I just got one of these basically free from AT&T that I plan to use only for hotspotting, my main device is an S21+.
I have sm-a125u, the only firmware I can find online for ATT is sm-a125u1
What's the difference? Is it the same? Can I flash it? Or can I just flash any other carrier's firmware instead?
I'm not even going to use this thing for anything other than a hotspot, I just want to root it so I can hotspot while tricking the carrier into thinking it's just mobile data use (since I'm on Unlimited Elite plan).
I don't have the OEM Unlock option in my dev settings, tried the time/date trick. So I read somewhere that I needed to flash an Android 10 firmware to it to get that option back, then go ahead and root, then update back to A11, if that's even possible. I don't care about the firmware being a different carrier's as long as mobile data will still work on ATT's network for hotspotting.