99.9% of the time the password is user defined. So for example, on 1 phone if it asks you for the password, type in 1111 (or whatever you want!!) and on the 2nd phone when it askes you type the same...
You unlock a mobile phone password by entering the correct password. Any other means constitutes cracking, and WikiAnswers will not give out information about that sort of activity. If you need to do...
Well, usually there is a little link beneath where you log into that says 'Forgot Password?' Click on that and you might have to answer a question that you may have chosen when creating that account...