Change main Google account login address When I activated my first Android phone, the Galaxy Note, last week it forced me to create a Gmail account for it.

Seeing no other way out, I did as I was told.

However, seeing yet another google mail address pop up was quite annoying, so I decided to try to get rid of it.

I managed to remove Gmail from my account permanently, and go back to my normal e-mail address to login to Google, but my Android device isn't following. It still has the gmail address set as login.

Is there a way to just change the login address? The account behind it is the same.
If you aren't rooted, you've to do factory data reset to change your primary Gmail acccount. (Settings > Privacy > Factory data reset.)

If you are rooted then you can use a file manager program to rename  /data/system/accounts.db file and restart the phone.

You can find the detail steps with illustration here.