QUOTE(fruitie @ Sep 27 2012, 06:34 PM)
Already asked this morning, cannot.
I tried myself as well, cannot.
My friend just called, can't find my username when she tries to login my Google account on her S3.
So, I'll register one specially for apps only.
Added on September 27, 2012, 6:57 pmBy the way guys, my friend tried using my Gmail to login into her S3, got the below error. Then, I registered new Gmail account also shows the same error. Can you guys tell us what is going wrong here?


your friend is doing it the wrong way. He/She should not go and change user name. Of course this error will come out as you already register the name, you friend sure cannot change his/her username to the same. Instead, add an account to his/her Google Play Store by Menu>>Add Account. Then sign in with your account. I think no need to register Credit Card info at this moment.
I think you should follow this:
1. Setup a new google account (actually your existing one should work fine if you friend is doing it the wrong way as i mentioned above).
2. Sign in your friend's S3 Google Play account with your account, you need to give her your username and password. Not changing her/his username.
3. Now go download some free apps.
4. Then remove the account from her/his Google Play Store.
5. Change your Gmail password.
6. From now on, you should be able to buy it from PC web browser after set up Google Wallet.
Hope this helps.

Added on September 27, 2012, 7:31 pmQUOTE(benny888 @ Sep 27 2012, 07:17 PM)
Only one user name per phone can download apps. Your friend must factory reset her phone so that it can download apps under your gmail id
Your proposed name already taken up by others
can lah, uncle Benny, my wife's S3 has 2 accounts set up at Google Play Store - mine with Google Wallet setup and hers without any CC info. Just need to switch account when you want to download any apps.
This post has been edited by Cynox: Sep 27 2012, 09:46 PM