Google Play

On your Android Phone or Tablet: 

1. Open Google Play app.
2. Go to Menu, tap on Payment methods.
3. Under Add payment method, select Enable Mobily billing.

On your Android Phone or Tablet: 

1. Open Google Play app.
2. Go to Menu, tap on Payment methods, then More payment settings.
3. Under the payment method you want to remove, tap Remove.

Android Operating Systems.