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...
It won't, unless it is a device purchased from T-Mobile. The device showing in your account doesn't matter. Samsung's U1 devices work exceptionally well with T-Mobile.
