: If the ROM doesn't include Google apps, repeat the install step with your GApps zip file.
: In the recovery menu, select Wipe and perform a "Factory Reset" or "Advanced Wipe" (System, Data, Cache, and Dalvik). Flash the ROM : Select Install . Navigate to and select your GZR.zip file. Swipe to confirm the flash. GZR.zip
: You must have a recovery environment like TWRP installed. : If the ROM doesn't include Google apps,