1.Make sure you have twrp installed 2.Make sure you have latest modem and bootloader installed from latest Stock Rom 3.Make sure your phone is fully charged to 100% 4.Download the ROM and transfer to your phone (ExtSD is suggested) 5.Boot the phone into Recovery Mode 6.Do a FULL wipe: Dalvik Cache, Cache, Data, Systemeven if coming from a port rom 7.Flash The RomThe first boot may take 15 min