Q&A from the article:

Fix Networking Problem with Korean Version of S4

Edited by passionut, Anonymous, Calob Horton, Eng and 7 others

Questions and Answers

Cannot connect to 3G network on Samsung Galaxy S4 China version?

The SIM card has been verified as a 3G type, and I have manually searched for a 3G network but it seems to be unable to connect with 3G. In its settings there are options for GSM/WCDMA but even when selected, it reverts back to GSM-only. I can then only get EDGE signal on the phone. Help!

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If you are in an area with poor reception, you may only receive EDGE signal. However, if you're in an area that you know has good reception, you can follow the steps below.

Switch between the different network options available on your device until you find one that works. If none of them work, call your carrier and ask for a new SIM card. The one you have may be faulty, which would prevent you from connecting to your carrier's 3G network. If the new SIM card doesn't work, you will need to call Samsung to schedule a repair.

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Invalid IMEI, no network service, My mobile is clone Samsung S5?

My husband bought a clone Samsung Galaxy S5 then I accidentally reset it, after boot there is no signal appearing and an invalid IMEI appeared

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From your dial pad input 3646633#*#*. Follow the steps in this Youtube Tutorial or Youtube Tutorial. You will want to click Write IMEI from the menu that pops up and then reboot your phone.

Samsung Galaxy S5 has refused to change network mode?

i.e from GSM to WCDMA or GSM / WCDMA auto

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  1. 1
    Dial from the dial pad in the number sequence ( *#*#4636#*#*).
    Leave out the parenthesis.
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  2. 2
    Select phone information.
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  3. 3
    Scroll down to find Set preferred network type.
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  4. 4
    Click on the drop down menu to select the option you want either WCDMA preferred or WCDMA only and vice versa for GSM.
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Then:

  1. 1
    Go into Settings.
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  2. 2
    Choose SIM Management.
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  3. 3
    Click Network Preferred and tap on your cell phone carrier name.
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How can I change the network mode of iPhone 5S clone?

How can I change, I do my best to change but it is normally back to the same network.

Restart your phone after you make the Network Change. If it is set to the previous selection again then go into LTE and drop it to the lowest setting. Restart your phone again.

The above questions are from the following wiki...
Fix Networking Problem with Korean Version of S4

More questions and answers

How to change TD-SCDMA/GSM to WCDMA Huawei Y511-T00?

I am form Myanmar Rakhine state Ann township. I use my Huawei Y511-T00 in

ooredoo 3G Network. I cannot use it. How to fix it?

Go back into your Network Mode Settings and reset the Huawei back to WCDMA. You may find it under Dual Card Standby. Then restart your phone. You may have to put the phone into Recovery Mode and Wipe Cache Partition before the phone will let you manually switch to the WCDMA. Your phone is a dual SIM so make sure the SIM are both cleaned and working properly. You can take them out and wipe them off.

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See more questions like this: My phone has options for GSM, WCDMA and LTE but only GSM and WCDMA are supported, LTE does not select?

How can I connect a Samsung S3 mini China to the network after Factory Reset?

My Samsung S3 mini China reads invalid IMEI and does not connect to the network

You can see in the top answer that you dial a sequence of numbers and then click Write IMEI to fix your problem. Once you have restarted your phone it should work properly.

I can't open network mode setting?

I can't change my network mode because I can't open the network mode setting

Transfer your data to the PC and hard reset your phone. You should be able to access the network mode after the hard reset because that reconfigures your network options. If not, long press on the Network Mode to see if you can force it to open. Try some of the dialpad codes in the VisiHow article on this page or Why i can't change the network mode is a questions and answers page that has some extra troubleshooting suggestions.

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I can't access 3G network on my Samsung S4 and I have checked the settings and my carrier, all are OK. I only get 2G. Whenever I switch to 3G, a triangle sign comes up on top most left corner on the screen?

Samsung S4 3G network issues, kindly help

Settings>mobile networks>network operators and select automatically the preferred network. OR Settings> connections> more networks> mobile networks> network mode and manually change the setting to WDCMA or vice versa.

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Trying to figure out why my GS4 is only connecting to EDGE?

I am trying to figure out why my GS4 is only connecting to EDGE. It was fine when it was new and then it stopped at some stage.

You may have inadvertently changed something in the Network settings. Go back in and select EDGE only. See if your phone will accept the option. If it does not then hard reset your phone. Back it up first using Samsung Kies.

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When I try to select auto-connect between GSM/WCDAM it automatically reverts to GSM?

The phone is a Korean version and its internet connectivity is so slow and frustrating?

Manual connect instead of Auto Connect. Reconfigure your APN settings if you still can't get your phone to keep your manual selections.

Hello, Samsung S4 Korean version, flash Lollipop version, problem with 3G net not supported, please help me?

Hello, Samsung S4 Korean version, flash Lollipop version, problem with 3G net not supported, please help me

Put your phone into Recovery Mode and Wipe Cache Partition. There may have been some cache from the previous OS stopping you from keeping your 3G.

How do I change it from Edge to 4G?

My phone is Redmi 1s and you can use 4G in China but when I came to my own country, I bought a new SIM card, it can only use Edge, how do I change it. I have tried: I tried factory reset, taking out my SIM card a lot of times, shutting and opening my phone. I think it was caused by: I check the internet and it said that it is because it is banned when you go to other country

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Categories : USE SAMSUNG GALAXY S4

Recent edits by: Maria, Menzovic, parvaneh

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