Q&A from the article:

Fix Network Problems In Samsung Galaxy S2 Korean Version

Edited by Anonymous, snethemba, Eng, MBA and 1 other

Questions and Answers

My S2 has no service and I do not think my SIM card is damaged. What will I do to have service?

My S2 has no service and I do not think my SIM card is damaged. What will I do to have service. I have tried: I can't open my phone because I need SIM card but SIM card in not damaged.

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You can attempt to fix your phone by following one of the methods below. Please note that the menu options may be slightly different or you may require to enter different options. If you perform some of the service menu steps (some of those may or may not work for you), then you may void your warranty. Please do it only when you cannot visit a Samsung service center.

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Method 1.

  1. 1
    Open the Phone application, which has an icon of a receiver.
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  2. 2
    Dial *#*#4636#*#*.
    You might enter the service mode. If you cannot, try another method.
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  3. 3
    Tap on "Phone information".
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  4. 4
    Tap on "Run ping test".
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  5. 5
    Tap on "Turn Radio Off".
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  6. 6
    Restart the phone.
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Method 2.

  1. 1
    Open the Phone application, which has an icon of a receiver.
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  2. 2
    Dial *#0011#.
    You might enter the service mode. If you cannot, try another method.
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  3. 3
    Press the menu button.
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  4. 4
    Tap on "Back".
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  5. 5
    Press the menu button.
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  6. 6
    Tap on "Key Input".
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  7. 7
    Type "1" by tapping on the input field.
    You should enter the service menu.
    • If this did not work, restart the method and type "Q". Then, select "Key Input" again and type "0000". Wait for 15 seconds.
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  8. 8
    Press the menu button.
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  9. 9
    Tap on "Back".
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  10. 10
    Tap on your network mode.
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  11. 11
    Tap on "DEBUG SCREEN".
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  12. 12
    Tap on "PHONE CONTROL".
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  13. 13
    Tap on "NETWORK CONTROL".
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  14. 14
    Tap on "BAND SELECTION"
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  15. 15
    Tap on "Automatic" or other options, depending on whether your phone is still not recognized.
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Method 3.

  1. 1
    Press the home button.
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  2. 2
    Tap on "Apps".
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  3. 3
    Tap on "Settings".
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  4. 4
    Tap on "More settings".
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  5. 5
    Tap on "Mobile networks".
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  6. 6
    Tap on "Network operators".
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  7. 7
    Tap on your carrier on the list.
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  8. 8
    Restart your phone.
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Method 4.

  1. 1
    Press the home button.
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  2. 2
    Tap on "Apps".
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  3. 3
    Tap on "Settings".
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  4. 4
    Tap on "More settings".
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  5. 5
    Tap on "Mobile network".
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  6. 6
    Press and hold the power and home buttons together until your device turns off.
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  7. 7
    Remove the battery once the device is offline.
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  8. 8
    Press the home and power buttons 10 times simultaneously.
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  9. 9
    Press and hold the power and home buttons for two minutes.
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  10. 10
    Insert your battery.
    Do not close the cover.
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  11. 11
    While your phone is on, remove and insert the SIM card three times.
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  12. 12
    When you see the message that asks you to restart your phone, do it.
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Method 5. Just in case, check IMEI by dialling *#06#. It should not be 0. Warning: changing IMEI can be illegal in some areas (even if you try to restore it to the right code). Please consult your local laws.

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  1. 1
    If it is 0, then type *#197328640# or *#*#197328640#*#*.
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  2. 2
    Tap on "Common".
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  3. 3
    Tap on "(FTM)".
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  4. 4
    Disable "FTM" if it is on.
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  5. 5
    Press the menu key.
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  6. 6
    Select "Key Input".
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  7. 7
    Type "2".
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  8. 8
    Remove your battery and SIM card for two minutes
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  9. 9
    Place only your battery back into your phone.
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  10. 10
    Turn the phone on.
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  11. 11
    Dial *#197328640#.
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  12. 12
    Tap on "Debug Screen"
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  13. 13
    Tap on "Phone control".
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  14. 14
    Tap on "NAS control",
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  15. 15
    Tap on "RRC (HSDPA)".
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  16. 16
    Tap on "RRC revision".
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  17. 17
    Tap on one of the revisions that is for your phone, for example "HSDPA only".
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  18. 18
    Turn off your phone again,
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  19. 19
    Reinsert the SIM card.
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  20. 20
    Turn the phone on.
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Method 6.

  1. 1
    Press the home button.
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  2. 2
    Tap on "Apps".
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  3. 3
    Tap on "Settings".
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  4. 4
    Tap on "More settings".
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  5. 5
    Tap on "Mobile networks".
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  6. 6
    Tap on "Network Mode".
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  7. 7
    Tap on one option after another and reboot your phone to see if it works for you.
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M250 says no SIM card & no network when SIM card is available?

Sometimes it works perfectly, but sometimes it says no SIM card, baseband unknown & IMEI null. I convert it to international version myself, but still the same problem. Please help. Sorry for my bad English.. I have tried: Converted to international version. I think it was caused by: I can't guess.

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Fix Network Problems In Samsung Galaxy S2 Korean Version

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Categories : Samsung Galaxy

Recent edits by: MBA, Eng, snethemba

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