Forum Discussion
Unlocked s21 Ultra showing as "Unknown Device" and not supporting 5G or Extended Range LTE on My Mobile account
I just bought an unlocked S21 Ultra directly from Samsung. It works great, including the tmobile voicemail app and RCS through the Google messages app. It says I'm connected to 5G on the phone, and...
On my phone, I can initiate a SIM Lock (haven't. cuz the T-Mobile is in slot 1), which is at a phone level, so the SIM can't be used in another phone or a 2nd SIM slot with a different EMEI No.
However, T-Mobile has applied a network SIM Lock on the SIM/EMEI in my slot 1. I have a DSDS Dual Nano-SIM phone.
The fix is a bit complicated, since I am somewhat on T-Moblie, but not Identifiable in their DB.
Very similar to my NMS acct issue where the IT staffer had access, and could add/delete/modify devices in the NMS, but from the GUI app, you couldn't find them at all.
T-Mobile needs to update their DB. They're a global carrier, and have the resources to pull it off.
