Are you using a ZTE Z899VL? If yes, are you looking for a way to remove Google account? If yes is your answer again, you are in the right page. You are in the page where you can bypass FRP on your device. To use your tablet again, follow my coherent instructions.
I tried all methods that i know but they dont work. Even I could access my phone settings, I can not disable service google play. We usually use youtube application for bypassing FRP on the most devices. Android operating system developers stopped some methods that we depend on to remove Google account such as talkback, hush SMS and SD Card.I personally found out a new method to remove FRP; after several attempts to bypass Google account on zte z899vl , I finally could find this refuge (solution).
follow these instructions:
download this tool from here . put your phone in recovery mode, connet your phone to the computer, select slideload, now launch the application that you have dwnloaded. select the model you have and click on frp reset.