Step 1: Download the custom ROM copied to an external SD card root directory
Step 2: the shutdown state. While holding down:
            – Power button + volume button up, to enter the recovery mode.
            – Wipe Data / Factory Reset -> delete all user data
            – Wipe Cache Partition -> Wipe cache
            – Advanced -> Wipe Dalvik Cache
Step 3: Return to recovery main interface Install zip from sdcard -> choose zip from sdcard -> Select your ROM
Step 4: Brush complete, restart the phone – Patience required – first boot takes a while