Change Primary Email of Android Without Factory Reset

1. Download Root explorer from android market and install the app in your android mobile.

2. Go to menu and tap the root explorer icon to enter into it.
3. After you enter into root explorer find goto /data/system and search for accounts.db.

Root Explorer

4. After locating the file, delete and reboot your android phone.
5. That’s all your primary email address will be deleted. After reboot enter your new Gmail id and Password.
6. These are all the steps in changing your primary email address without factory reset.