1 Download LG UP from here: http://forum.xda-developers.com/show...99&postcount=2 2 Flash the kdz from puerto rico from here: http://storagecow.eu/Xda/LG%20G4/H81...10PR10a_04.kdz 3 flash the kdz and In Developer Options enable USB Debugging4 root with this http://forum.xda-developers.com/att-...810pr-t3168322 5 download flashfire from the appstore and make a backup of bootloader, baseband.6 download LG flash tool 2014 from here http://forum.xda-developers.com/g4/g...8/post60718499 7 download this kdz and flash it with LG FLASH TOOL 2014 http://storagecow.eu/Xda/LG%20G4/T-M...H81110H_00.kdz 8 reflash the kdz with LG UP (in this secuence)9 root with this tutorial using the T-Mobile H811 10H Version http://forum.xda-developers.com/g4/o...ot-lg-t3164765 10 In Developer Options enable USB Debugging and oem unlock11 download flashfire from the appstore and flash TWRP fom here https://www.androidfilehost.com/?fid=24269982087020079 12 you're done just do some research and download cyanogen 12.1 for h811Just got this link for cyano 12.1ps: i have my backup but i cant get signal and ril if i flash H810pr i get signal again if anyone can help us with that