Btw, I got an unlocked note 8(sm- n950u1), with at&t sim card. Initially, I flashed with ...s3BRA8 w/ at&t variant, still wifi calling and video calling are not working. Tried doing carrier switching, no problem from step 1-10, however steps 11 - 27, right after step, my phone went recovery but does not have the option of resetting, and doing step 11, (adb already set up & on the right folder), its says my phone not listed or is not authorized, so it stuck on the boot, no option to slide the vol up/down, so I have to turn off, put it on downloading mode, wherein I go straight to step to step 28(flashing carrier firmware).
Other problems encountered: phone went to factory binary homescreen, (at least 15- 30 min waiting)but it did not load up to IME, to dial the code step 22. So, I have to skip to step 28, because it stock to boot/recovery.
So now, my note 8, which is on 7.1.1(android ver), N950U model, NMF26X.N950USQS3BA8.
Problems so far encounter w/ the phone: no video calling, no wifi calling, group sms incoming text partial or not receiving text from from iphone/android user.
Last, I think my unlocked phone does not have the right recovery mode, because there's no option of resetting, power off, reboot, mounting the phone so I can connect to adb.
Any help, will greatly appreciated