Your device must have an unlocked bootloader to accept custom software.
If you are building a custom ROM from source, you can bake GApps directly into the system image. Download Blobs gapps android 51
Once the installation successfully finishes, tap . The first boot can take anywhere from 5 to 15 minutes as Android configures the new system files and initializes Google Play Services. Troubleshooting Common GApps Issues on Android 5.1 Your device must have an unlocked bootloader to