when your phone is blocked...need help

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http://androidforums.com – Hello This is my problem: My brother's phone (Barcelona) is to much times wrong deblockd. So he need to fill in his gmail account and password. The problem is he don't know his pass or gmail account. What I remember is that he needed to fill in a secundair e-mail adress. And that is me... My question is now How can i know his password and gmail account? his phone: Barcelona android: 2.2 Thanks :) Ruben (General)