SGP311 4.2.2 [ROOTED] - CONFIRMED!!!
1. Starting point: Stock ROM 10.1.C.0.370
2. Rooted device using DooMLoRD Easy-Rooting-Toolkit
3. Installed SuperSU into /system - this took several attempts
4. Applied Sony update via OTA 10.3.1.C.0.136
5. Device has now 4.2.2 ROOTED!!! 8-D
And I also made a backup of my TA partition after step 2, just in case![]()
Followed everything here. Root wiped out upon OTA install.