1. Moonman5185's Avatar
    My wife and I got new S21 5g phones when we were with T mobile and ended up redeeming an incentive to bring your own device to Verizon. The phones are unlocked and have a Verizon sim card. Since switching the video calling and wifi calling phone functions are not working, but they did work when on T mobile. When I restart the phone the T mobile banner still is displayed. Both Samsung and Verizon tech support seem stumped. I've reset the network without change. Any ideas how to make the phone forget it's T mobile beginnings and recover these features?
    09-26-2021 07:23 AM
  2. buzzy3970's Avatar
    You will need to flash the software on your phone to either unlocked or Verizon. There's a stickie on how to do that in the top of this forum subject.
    mustang7757 likes this.
    09-26-2021 09:19 AM
  3. Kizzy Catwoman's Avatar
    @mustang7757 can also help with this.
    mustang7757 likes this.
    09-26-2021 09:34 AM
  4. mustang7757's Avatar
    Yes we have a sticky on this , your device is Tmobile version but sim unlocked or Unlocked ?
    09-26-2021 10:44 AM
  5. Moonman5185's Avatar
    Thanks for the help! The device was unlocked after it was paid off at t mobile and the Verizon sim is in the phone and active on the network. I'll look at the sticky and see if I can figure out more.
    09-26-2021 11:06 AM
  6. mustang7757's Avatar
    Thanks for the help! The device was unlocked after it was paid off at t mobile and the Verizon sim is in the phone and active on the network. I'll look at the sticky and see if I can figure out more.
    No problem , if you need further help just tag me @mustang7757 I would flash to unlocked firmware.
    Laura Knotek likes this.
    09-26-2021 05:14 PM
  7. TheAngryToaster's Avatar
    Thanks for the help! The device was unlocked after it was paid off at t mobile and the Verizon sim is in the phone and active on the network. I'll look at the sticky and see if I can figure out more.
    Question when you activated the phone on Verizon did you just slap the Sim in it?

    I am thinking that you may need to do a factory reset. Set the phone up as new with the Verizon Sim in from the very start and see if that kicks everything on so to speak.
    09-26-2021 08:36 PM
  8. buzzy3970's Avatar
    Question when you activated the phone on Verizon did you just slap the Sim in it?

    I am thinking that you may need to do a factory reset. Set the phone up as new with the Verizon Sim in from the very start and see if that kicks everything on so to speak.
    It won't. The phone will need to be flashed. Speaking from personal experience as I'm using a T-mobile S21 Ultra on Verizon.
    09-26-2021 09:46 PM
  9. buzzy3970's Avatar
    Another thing you can do OP is download the Android 12 beta. With the beta it will actually change your firmware to give you the Verizon features you're hoping to gain.
    09-26-2021 09:54 PM
  10. mustang7757's Avatar
    Yeah i think they will be better off on unlocked firmware
    buzzy3970 likes this.
    09-26-2021 10:28 PM
  11. Moonman5185's Avatar
    Yeah i think they will be better off on unlocked firmware
    @mustang7757. Thank for the tips so far. I've tried to flash using 2 versions of odin and the u1 software but it keeps failing. Any ideas?Missing features on S21 after switch from T mob to VZW-screenshot-34-.jpgMissing features on S21 after switch from T mob to VZW-screenshot-35-.jpg
    10-04-2021 11:42 AM
  12. mustang7757's Avatar
    Make sure your in download mode , try different ports on your computer
    10-04-2021 11:48 AM
  13. Moonman5185's Avatar
    Make sure your in download mode , try different ports on your computer
    Yes, I'm in download mode on the phone and only have 2 usb's com 4 and com 5. Both are recognized but same result. ?
    10-04-2021 12:10 PM
  14. mustang7757's Avatar
    Yes, I'm in download mode on the phone and only have 2 usb's com 4 and com 5. Both are recognized but same result. ?
    The patched odin thats 3.13 ? I believe latest is 3.14.1
    10-04-2021 12:11 PM
  15. Moonman5185's Avatar
    The patched odin thats 3.13 ? I believe latest is 3.14.1
    Yes, 3.14.1 says SHA256 is invalid. So I tried 13.3 with the patch since that was supposed to fix that
    10-04-2021 12:20 PM
  16. mustang7757's Avatar
    And your not touching anything in odin option list ?

    Try different cables also
    10-04-2021 12:22 PM
  17. Moonman5185's Avatar
    And your not touching anything in odin option list ?

    Try different cables also
    One step closer with a new cable, using odin 3.14.4 still has the sha256 error. Using the older version with the 3b patch now says "setting up connection" and never changes.
    10-04-2021 12:42 PM
  18. mustang7757's Avatar
    One step closer with a new cable, using odin 3.14.4 still has the sha256 error. Using the older version with the 3b patch now says "setting up connection" and never changes.
    Wait it out for settings up connection
    10-04-2021 12:43 PM
  19. Moonman5185's Avatar
    Wait it out for settings up connection
    Still no luck. Out of time for today but I'm going to try a different laptop and start from scratch tomorrow, hopefully with better luck. Cheers and thanks!
    mustang7757 likes this.
    10-04-2021 02:32 PM
  20. mustang7757's Avatar
    Still no luck. Out of time for today but I'm going to try a different laptop and start from scratch tomorrow, hopefully with better luck. Cheers and thanks!
    Okay that sounds good try another laptop
    10-04-2021 02:33 PM

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