Remove Google Account ZTE Maven Z812 AT&T

I would like to send a thank to my friend in USA. With his help, I can remove google account on ZTE Maven model Z812 from AT&T USA network. This phone are using Android 5.1 with google account requirement
We takes 10-15 minutes to finish
We deleted the old google account or gmail on ZTE Z812
We bypass the previous google account on ZTE AT&T Z812 completely

If you want to do, please contact us via:

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Thank you