[Q] AT&T M8 to Tmobile Viper ROM...Help topic

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Hey Guys,

I haven't posted in a long time but I have been unable to figure this out despite doing many searches etc. My M8 is from AT&T but has a T-Mobile SIM. My goal is to have Viper ROM with working Wifi & MMS because those have been the main problems.

- I have an AT&T M8 that could NOT send MMS but had working Wifi. I tried 20 dif APN settings and I'm convinced it will not work. The phone has/is...
Rooted
Bootloader unlocked
TWRP
S-ON
Android 4.4.2

I flashed Viper ROM and MMS started working but I lost Wifi. I flashed back to Stock AT&T ROM. I (now) know I need to be running 4.4.3 to have working Wifi with Viper. I 'THINK' I need to do the following...

a) gain S-OFF (Sunshine)
b) run T-mobile RUU to Stock then get Tmobile OTA update to 4.4.3
c) flash Viper Rom

Is this correct? If not, what would I be doing wrong?




xda-developers


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