Fix Network Problems In Samsung Galaxy S2 Korean Version

Edited by Leomar Umpad, Lynn, Eng, Anonymous and 11 others

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If you are experiencing network problems with your phone, this VisiHow article may be able to help you. There are many reasons why you may be experiencing problems. This article will tackle possible causes for the problems, and offer fixes for these issues. A pictured guide has been included for your reference, so you will have be able to view the procedures for fixing the network problems in your Samsung Galaxy S2 Korean Version. '

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0 fix network problems in samsung galaxy S2 korean version.PNG

Though you can jump from one fix to any of the other suggested fixes on the diagram, it is advisable that you view them from the start and follow the arrows until you solve your network problems. This article will follow the diagram's flow since it was designed to start with the easiest fix and progress to the more complicated solutions. As a summary, the solutions are the following:

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Contents
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Fixing Network Problems in S2 Korean Version

  1. 1
    Check to see if your location has a good, stable signal.
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  2. 2
    Check to make sure the problem is not with your SIM card.
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  3. 3
    Check to see if there are issues or scheduled maintenance from your network provider.
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  4. 4
    Check to see if your phone is still under warranty.
     
    1. If it is still under warranty, do not make any changes or attempt repairs. This will void the warranty. Take your phone to a Samsung Service Center.
    2. If it is not under warranty, root your device, as the next fixes require a rooted phone. Rooting gives you access to the administrative commands and functions of your phone.
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  5. 5
    Perform a reset on your phone.
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  6. 6
    Check your phone's IMEI for problems on it.
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  7. 7
    Restore phone settings using a backup file (if available).
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  8. 8
    Reflash phone with a stock ROM.
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  9. 9
    Use the EFS Fix zip file to solve your network issues.
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  10. 10
    Manually perform an EFS fix on your S2 Korean Version.
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  11. 11
    Fix the RIL-Baseband compatibility issues of your phone.
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  12. 12
    If all else fails, have your device checked by a service center.
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Check to see if your location has a good, stable signal.

Wireless Signal's reception varies from location to location. This could be the reason you're experiencing network problems on your S2 Korean version. To determine if there is a problem with the location:

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  1. 1
    Check your phone's signal indicator to see if it is on a low signal icon.
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  2. 2
    Check with other people in the same location (with the same network as you), to see if they are experiencing the same problems.
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  3. 3
    Try moving to another location and then check to see if the issue has been resolved.
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  4. 4
    If your problem has been fixed with any of these solutions, you can start using your phone again.
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  5. 5
    If the problem has not been fixed by moving to another location, or other people in your location do not have the problem, then proceed with the next solution.
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Check to make sure the Problem is not with your SIM Card

Constantly removing and reinserting your SIM card may damage it. Follow the procedures below to see if there is a problem with your SIM Card:

  1. 1
    Remove the SIM card from your phone and insert it to another phone.
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  2. 2
    If the problem is evident on the other phone you're testing it on, then the problem is with your SIM card.
    Replace it and you should be able to fix the problem. You can retain your number by calling your network's customer service representatives and asking for a number retention service.
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  3. 3
    If the problem is just on your phone, and the other phone works fine with your SIM Card, you know it's not an issue with your SIM card.
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  4. 4
    Perform the next solution if this is the case.
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Check to see if there are issues or maintenance with the network provider.

There are times your network provider will perform maintenance and other actions that may affect network service. You may do any of the following to see if there is a network related issue within your area.

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  1. 1
    Check with other people in the same location (with the same network as you), to see if they are experiencing problems with their network signals too.
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  2. 2
    Call your network's customer care and ask if there are network-related activities in your area that might be causing the problems you are experiencing.
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  3. 3
    Check with the network's customer care to see if your phone or SIM card has been blocked from any network services.
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  4. 4
    If there are no service interruptions from your network provider, then proceed with the next solution.
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Check if your phone is still under warranty.

The next solutions will require you to have a rooted phone, so you should check to see if your phone is still under warranty, as rooting your phone will void its warranty.

  1. 1
    If your phone is still under warranty, have it checked and repaired by the service center.
    Usually, repairs of these kinds are free as long as you did not void your phone's warranty.
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  2. 2
    If the warranty of your phone has expired, you may consider rooting it.
    Full instructions on rooting your phone can be found in this VisiHow article.
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Update Samsung Galaxy S2 to Android 4.3 Jelly Bean

Perform a reset on your Samsung Galaxy S2 Korean version.

If you have installed an application recently or have deleted an important system file, you may want to perform a reset on your phone. A reset will restore your phone to its original settings. The process will also delete all of your phone's data so it is wise if you perform a backup procedure before proceeding.

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Back up your Samsung Galaxy S2's data.

  1. 1
    Go to your phone's Home Menu and tap the Application menu icon (lower-right portion of the touch screen.)
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  2. 2
    From the Applications folder, go to Settings (gear icon)
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  3. 3
    From Settings, tap on Accounts & Sync.
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  4. 4
    Tap "Add account" and enter your Google account username and password.
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  5. 5
    Go to Settings and tap on Privacy.
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  6. 6
    Put a check mark on "Back Up My Data" and "Automatic Restore".
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  7. 7
    Go to Settings and tap on Accounts and sync.
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  8. 8
    Choose what data you want to backup.
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  9. 9
    Backup will now start.
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  10. 10
    Done.
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Perform a Reset on Samsung S2

After making sure you have properly backed up your phone, you can now proceed with the reset procedures below:

  1. 1
    Go to your phone's Home Menu and tap the Application menu icon (lower-right portion of the touch screen.)
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  2. 2
    From the Applications folder, go to Settings (gear icon)
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  3. 3
    From Settings, tap on Backup and reset.
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  4. 4
    From there, tap on Factory data reset.
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  5. 5
    Tap on reset device and choose Delete all.
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  6. 6
    You are done resetting your phone.
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  7. 7
    Alternatively, you can dial *2767*3855$# to reset your phone easily.
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  8. 8
    Done.
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Now, check if the reset has corrected your network problems with your phone. If it hasn't solved the issue, then proceed with the next procedure.

Check your phone's IMEI (International Mobile Equipment Identity) for problems.

Sometimes network errors are caused by problems on your IMEI. Some phones whose IMEI has been altered may have occasional loss of network connectivity. To check your phone's IMEI, do this:

  1. 1
    Check for your phone's current IMEI by dialing *#06#.
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  2. 2
    You can also check your IMEI by going to Settings > About Phone > Status.
    Scroll your screen down until you will see the information.
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  3. 3
    Check if the same IMEI number is on the back of your phone.
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  4. 4
    If the IMEI of your phone does not match what is indicated on your phone's back; or your IMEI starts with 0000 or 0049, then you have a problem with your IMEI.
    Try either of these two solutions:  
    1. If available, restore your phone from a saved backup.
    2. If no backup is available, you can flash a stock ROM to your phone using ODIN. The section "Steps to Update Galaxy S2 to Jelly Bean 4.3" under the VisiHow article on how to Update Samsung Galaxy S2 to Android 4.3 Jelly Bean will guide you on how to use ODIN to flash a firmware (ROM).
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  5. 5
    If none of these suggestions work, you may proceed to the next steps.
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Use the EFS Fix zip file to solve your network issues.

You can use a file to fix your network issues by using ADB. To do it, follow the procedures below:

  1. 1
    Download and install Samsung Kies to your computer.
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  2. 2
    Download and install SDK installer on your PC.
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  3. 3
    Download the EFS Fix zip file here.
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  4. 4
    Unzip the EFS Fix zip file to your Desktop so you can easily locate it.
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  5. 5
    Turn off your phone and restart it into CWM recovery mode.
    To do it press and hold Power button + Volume Down + Home Menu until the phone starts.
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  6. 6
    Using your volume buttons for navigation and the Home button for confirmation, go to Mounts and storage and choose "mount /efs".
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  7. 7
    Connect your phone and your computer using a USB cable.
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  8. 8
    Open the CDM (command prompt) on your PC and go to the unzipped adb.
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  9. 9
    Type "adb devices" into command prompt so that your computer will detect your device.
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  10. 10
    Type "adb push keystr /efs/IMEI" to put the keystr file into the IMEI directory.
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  11. 11
    Reboot your phone and check if the problem has been fixed.
    You can also do this manually by following the procedure below.
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Manually Perform an EFS Fix on your S2 Korean Version.

If for some reason you are not able to perform the previous fix, you can do it manually by following these procedures:

  1. 1
    Download and install ES File Explorer on your phone.
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  2. 2
    Open ES File Explorer.
    Tap on the Menu button to open "Settings," and put a check mark on the root settings.
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  3. 3
    Using ES file Explorer, navigate to "/efs/IMEI"
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  4. 4
    Tap on "Menu" and create a file with the file name, "keystr"
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  5. 5
    Set permissions to "rwx-rwx-rwx."
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  6. 6
    Reboot your phone and check to see if the problem has been fixed.
    If it network issues remain, proceed with the next procedure.
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Fix the RIL-Baseband Compatibility Issues on your Phone

This is a very common issue if one modifies a Korean phone's firmware to… Remove SMS Limit in Samsung Galaxy S4 (Korean Version). A technician may flash the wrong baseband version, thus causing the network radio of the phone to function abnormally. To solve this:

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  1. 1
    Download and install GetRIL on your phone.
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  2. 2
    Open "GetRIL" and tap on the "Scan" button.
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  3. 3
    The application will scan for your Radio Interference Layer (RIL) and Baseband compatibility.
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  4. 4
    GetRIL will then tell you if your RIL and Basebands are compatible.
    0RIL match fix network problems in samsung galaxy S2 korean version resize.PNG
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  5. 5
    If they are not compatible, GetRIL will tell you what Baseband is compatible with your phone.
    0RIL Does not match fix network problems in samsung galaxy S2 korean version resize.PNG
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  6. 6
    Search and download for the recommended baseband and flash it via ODIN, using the procedures from the article on Update Samsung Galaxy S2 to Android 4.3 Jelly Bean.
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Galaxy S2 SIM Card not working: Hardware Solution

If you have tried all the possible software fixes on your Samsung Galaxy S2 and your phone still does not get a network signal, then it could be a hardware problem. You may need to perform any of the following on your phone to get a network signal and for it to read and recognize the inserted SIM card:

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  1. 1
    Make sure that your phone is not network-locked.
    If you got your phone as part of a plan from a network, chances are your phone could be carrier-locked. No matter what you do, if your phone is network-locked, you cannot use another SIM card in it unless it's a SIM card from the same network. You need to give a network-unlocking service to your phone so you can use a SIM card from other networks. There are a lot of trusted online unlocking services available that give you unlocking codes for a fee, but if possible, it's always advisable to get the unlocking service physically from a capable technician. Just make sure that you won't have problems with your contract with the service provider if you plan to use the unlocking service. See to it that you have reviewed the contract and the terms of service for using the phone.
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  2. 2
    Clean the terminals of the SIM slot reader of your phone.
    Check if the terminals of your phone are clean. As time goes by, especially if you are frequently in a dusty area, dirt can build up on your phone's SIM card terminals. This build-up of dirt can hinder the connection of the SIM card slot terminals and the SIM causing problems with SIM detection.
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  3. 3
    Clean the terminals of the SIM card.
    Similar to the SIM slot reader, build-up of dirt on the terminals of your SIM card can cause problems with the connection between the SIM slot and the SIM card. You can use a little pointed object to clean the dirt in between the linings but do so it gently so you won't damage the SIM card.
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Bring your device to a service center.

All areas have been fully covered. If you have tried each solution to no avail, then it is time to bring your Samsung Galaxy S2 Korean version to your authorized service center. This may be a hardware problem and the only fix for this may be to replace it with a new network radio. There are several things you can do to fix software related issue, but if the problem is with the hardware, let the service center handle it.

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Questions and Answers

My Samsung S2 SHW-M250S SIM not working. How to jumper SIM socket?

My Samsung S2 SHW-M250S SIM not working. How to jumper SIM socket ?

Do not try those alternative fixes to problems, as it may make your problem worse. If you have a problem with your SIM slot, do not try installing jumper on it just to make the phone recognize your SIM card.

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Check to see if the problem is with the SIM card or your SIM slot. Insert a different SIM to your SIM slot. If your phone recognizes the newly inserted SIM, then the problem is with your SIM card. Replace your SIM card with a new one. If you want to retain your old number, you can call the customer service representative to ask for a procedure for number retention due to damaged SIM card.

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If the problem remains even if you are using another SIM, and you have inserted your SIM card to another phone without any problem, then the problem is with your phone or the SIM slot on it. In this case, bring your device to a qualified technician and have it checked.

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Network issue after update Samsung?

I have Samsung S2 Korean. I convert it to gt i9100 now there is no network

There is a problem with your base-band compatibility. This is a very common for Korean phones that were converted to recognize local SIM card. You can check on this section on how to Fix Network Problems In Samsung Galaxy S2 Korean Version to get the solution for your problem.

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You can recover the network by following the steps below:

1. Go to settings

2. Update device

3. Tap on the update url

This is going to update the network profile for your device.

See more questions like this: Network problem for Samsung Galaxy S2

Need to know the IMEI number on SHW-M250S S2 phone.

Model: IMEI is not getting by dialing the *#06# and not printed IMEI on sticker under the battery.

There is a very good chance your device is not an authentic Galaxy S2. There are a lot of cloned Galaxy phones available. There are many discussions on how to know a fake Galaxy S2 phone and your phone has the indicator that it is fake. Dialing *#06# will return the device's IMEI for all Samsung Galaxy phones so if your phone does not display the IMEI, then it may be a fake one. You can also use Kies to identify your device. Download Samsung Kies to your computer and connect your phone to your computer via USB cable. If Samsung Kies does not detect your phone, then your device is not the genuine one.

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One way that you can receive the IMEI number of your device is to contact your carrier's customer service so they can give you the specific details of your device.

See more questions like this: S2 Korean phone radio not work?

How to fix my Samsung i9100 when both the base-band and IMEI says unknown.

How to fix my Samsung i9100 where both the base-band and IMEI says unknown

In order to get this situation corrected, you need to contact your carrier's customer service number, so you will be able to get the information you need. The device will need to either be reconfigured over the network, or you need to take your device to your carrier's customer service.

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To fix this problem on your phone, please do the following:

  • If the problem is still there after updating your phone, please follow the instructions on "Use the EFS Fix zip file to solve your network issues."
  • If the problem is still not fixed, follow the instructions on "Fix the RIL-Baseband compatibility issues of your phone"
  • If all else fails, please bring your phone to Samsung repair center.

How to fix my Galaxy S2 shw-m250k v4.0.4?

Problem is no baseband version no IMEI no signal. Please help

It looks like you were trying to flash a custom ROM and the process messed up your phone's baseband and IMEI info. You can use ODIN software and try to flash back a stock ROM to restore your baseband and IMEI.

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To do this, you will need the ODIN software for your PC. Download the latest version here:

http://www.android.gs/download-odin-1-85/

You'll also need Samsung's USB mobile drivers, found here:

http://developer.samsung.com/android/tools-sdks/Samsung-Android-USB-Driver-for-Windows

Lastly, you'll need the stock ROM image file for your SHW-M250K model.

With the files downloaded and setup, you'll need to connect your phone to the computer. Have the ODIN software open, and boot the phone into download mode by pressing/holding power, volume down and home buttons together. When connected to your computer, the com port window should be lit - if the USB drivers were installed correctly. Use the pda button to browse for the stock ROM file you downloaded and hit Start to flash the firmware.

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See more questions like this: Fix my S2 GT-i9100 phone Baseband version

How to upgrade it to normal version of S2. I do not understand it.

I do not understand it because it was so tough to configure

The best way to get your device back to its original settings and version, is to perform a Hard Reset on the device. Based on your question you have not provided what you have altered on your device in order for me to help you to re configure without having to perform a Hard Reset.

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You can upgrade to your normal version by either completing a factory data reset on your device or by going to Settings>>>About Device>>Update Firmware, which will take you back to the version that is recommended for your device.

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My Galaxy S2 m250k Korean Version even though full signal bars it says not registered on network.

My Galaxy S2 m250k Korean Version says it's not registered on network, even though it shows full signal bars.

This means your device has been knocked off of the network that you are currently connected to. To fix this situation, you can do the following below:

1. Go to settings. 2. Go to update device. 3. Select the update PRL and Profile option to register your device back to your network.

You can try and perform a Hard Reset on your S2 Korean version by:

  • Back up files by downloading Samsung Kies:

http://www.samsung.com/ph/support/usefulsoftware/KIES/JSP

  • Go to your dialer app.
  • Dial the following:

  • 2767*3855#

  • Phone will reboot.
  • Phone will be restored to factory settings.
  • Plug the phone to your computer.
  • Run the Kies program.
  • Go to the back up restore tab.
  • Choose restore.

NOTE: Remove SIM card and SD card before performing Hard Reset

If the procedure above does not change the signal issue, I suggest you seek a technician's help who knows a thing or two about rooting and customized ROMs for your S2. In your case, you may need to root your phone and change the firmware by changing the ROM.

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See more questions like this: Why it doesn't show signal in SII HD LTE Korean version?

Signal in Samsung Mobile not working. I purchased from Korea and using in India.

Hi. I purchased SHW-M250S (Samsung Galaxy S2) from Korea. It was working fine in India since last year. But suddenly, few days back, I lost the signal with a error message "Registration Failed(13)" Now there is a circle with a diagonal line in place of network. Only for 5-10 minutes I got the signal in a day. Also when I am going to network settings it is giving the message, "Insert USIM to access network services" I am in great need. Please help!

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Reboot the phone, re-insert the SIM card and make sure that the carrier is on roaming (if the carrier is not local). If all else fails, do a Hard Reset by dialing: *2767*3855# (please remove SIM cards and SD card, also do a Back Up using Samsung Kies) This procedure will delete all apps and data on your phone. If the issue persists, please send your phone to an accredited service center to get it fixed.

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Hi my mobile is without network. I need new IMEI in my phone.

My mobile model GT-i9100 MADE IN Korea BY Samsung

The IMEI number is the number associated with the device. You cannot simply purchase or request a new IMEI number being that the number is attached to that particular device, not just a number that can be given out. Contact your carrier's service customer service in order to have your network services restored.

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Hi. Is there a big difference between Korean Version and other Samsung Galaxy phones?

I'm talking about board components and problem solutions.

There's not really much of a difference, except that you can expect better service if it's not Korean version. If in case you encounter any technical glitches or anything like that, you may have to pay if it's Korean version. Unlike the other types, you are covered by an international warranty, which means that you can have it repaired even when you are not in the place where you bought it.

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I cannot register network in S2. How can I?

I cannot register network in S2. When I do it manually, it says unable to connect. What can I do

You have to check whether your S2 is actually locked to a particular network. For example, if you bought your device from the office of a network following certain promotional packages there, it is highly possible that your phone is locked to use with only that network. If you use another one, it won't be allowed. Therefore, check whether your device has this kind of restrictions.

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No signal and no IMEI on my phone. Please help me?

Phone is Samsung Galaxy S2 gt-i9100.it is unlocked, but no signal and no IMEI

This is a problem that began in most Samsung Galaxy S2 phones which is dubbed, "Airplane Mode Bug" which is triggered when trying to change networks from 2G to 3G. To fix this, you just have to go to "Applications" and then disable or switch off "Dialer".

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Internet not working on Samsung Galaxy S4.

I am using Samsung GT-i9500 Galaxy S4 version. But this is a clone phone. I am from Maldives. There is no problem in the network. But I couldn't connect to the internet. Can you please solve this issue?

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If the internet is not working on your device, then you are going to need to perform the following steps before you contact your carrier to help you with your Internet settings through the network.

-Go to settings.

-Go connections.

-Go to mobile network data and disable this option.

-Go back the enable the settings.

This will give you a simple reset on your device so that you will be able to reset to fix your problem. If this does not work then you are going to need to contact your carrier to that they can reset your settings on your browser and internet on your device.

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How did it happen that my message limit changed to only 90 characters? I cannot send a longer message because of this limitation.

When I reach the 90-character limit of the message, it automatically turns to MMS. That's why my message doesn't send. I tried to change the settings many times. I formatted the phone twice but it does not change anything. I don't know how, but it just happened.

Was this helpful? Yes | No | I need help

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

No signal on US Cellular SCH-R970?

First I lost my IMEI. Then I repaired it, but H/W version is unknown and there is No Signal.

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Made in Korea GT-I9100 SIM track open.

SIM track by jumper diagram. Any repair solution? Please help!

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

I'm from Bangladesh. I want to set the internet, but how?

3G internet. I tried many times to set internet, but not possible. Why?

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Where can I see the application when I am balancing the load?

Can't see where should I balance the load

VisiHow QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Hello. Can you suggest a proper solution for my problem?

Sir, I have a Samsung Galaxy S2, model number SHV-E110S Korean set and now I am in Nepal. I have a strange problem with it. First my SIM was damaged and I replaced it with a new SIM. After replacing the new one, a problem occurred that made the network fluctuate randomly. It fluctuates about every minute, and when I make a call, the signal goes out of service. One important thing is that only the replaced SIM has this problem. Another SIM works fine. What can I do, Sir? Please note that I have replaced 3 SIM having the same number but the problem is the same on all of them.

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Categories : Samsung Galaxy

Recent edits by: dhakal, shahin alam, Akram khan

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