1. ManDroid7's Avatar
    I currently own a Galaxy S4 SHG-M919. I know that the SIM is fine because it's new and I already tried on another phone. The problem is that if this is not a hardware issue, I have no idea how to get it to read it. I appreciate any input that you may give me. Thanks in advance!
    11-30-2015 03:28 PM
  2. B. Diddy's Avatar
    Are you sure that particular S4 model is compatible with the carrier that the SIM belongs to?
    12-01-2015 05:00 PM
  3. ManDroid7's Avatar
    Yes. T-Mobile sent it to me and it had been working for a while before it just didn't detect it anymore..
    12-01-2015 07:03 PM
  4. B. Diddy's Avatar
    If you go to Settings>Mobile Networks​, can you find an option for Preferred Network Provider and see if the wrong one is selected?
    12-01-2015 09:49 PM
  5. ManDroid7's Avatar
    You know, that's one of the first things I did. I contacted T-Mobile and they asked me to do just that. The problem is that I kept on getting the same error message:Why is my Samsung Galaxy S4 not reading my SIM card?-screenshot_2015-12-01-21-12-47-1.png
    12-01-2015 11:16 PM
  6. B. Diddy's Avatar
    Try using a can of compressed air to blow out the SIM slot, in case there's some junk stuck in there.
    12-02-2015 01:14 AM
  7. ManDroid7's Avatar
    I'll do that. I haven't tried that yet. I'll let you know what happens. Thanks!
    12-02-2015 08:25 AM
  8. ManDroid7's Avatar
    Well, I did get a can of compressed air and tried to clean the slot like crazy. It didn't work.... Is there a way to diagnose the SIM connections by trying to downloading something into the SD card. Let me know please...
    12-02-2015 12:52 PM
  9. B. Diddy's Avatar
    Any recent system updates? If so, did this start soon after the update?

    You might want to try reinstalling the firmware using Samsung Kies, Smart Switch, or Odin. http://forums.androidcentral.com/amb...interface.html
    12-02-2015 02:47 PM
  10. ManDroid7's Avatar
    I'm gonna do it. That may just be the one thing that I haven't tried, redoing this with the right software. We'll be in touch. Thanks!
    12-02-2015 03:52 PM
  11. ManDroid7's Avatar
    In order to use Odin, I need to re-root my phone. Is that correct????
    12-03-2015 06:02 PM
  12. B. Diddy's Avatar
    I don't think so. Mind you, I don't have direct experience with Odin, but from what I've read and discussed with my colleagues here on AC, I'm pretty sure it doesn't require rooting.
    12-04-2015 01:35 AM
  13. ManDroid7's Avatar
    I apologize for confusing you when I asked you "in order to use Odin". I may already found out the problem. My IMEI needs to be restored. I went to settings and found this.
    You got any ideas on how to fix this?
    12-04-2015 11:08 AM
  14. B. Diddy's Avatar
    What does it say? That the IMEI is null? Sorry, but I'm not sure how to restore it if it got corrupted somehow. You could try here: [GUIDE] Restore You IMEI And Fix Corrupted E… | Android Development and Hacking
    12-04-2015 03:01 PM
  15. ManDroid7's Avatar
    Thanks for this link Diddy! I'm gonna look it over and read it carefully. I mean, I'm really deep into this anyhow. I might as well try it and see it I can make it work. Sorry that I barely got back, but I'm in the middle of some work myself. I WILL let you know what becomes of all this. I appreciate your help!!!
    B. Diddy and Steeltoe like this.
    12-04-2015 04:09 PM
  16. Steeltoe's Avatar
    Thanks for your help Diddy. I all worked out in the end with your help!
    12-20-2015 01:50 PM

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