How to resolve sign in problem with adding account on android.

Requirements: 

A rooted android device

Root browser apk

And a working data connection

First you will install root browser and grant root access.

1:Next you'll locate the system folder, then you'll find the folder named (etc,  click on it and find the file named hosts open it using its text editor.

2:Delete it's entire content and save.

3:Exit the app and the go back to your settings and click on add Google account and proceed.