Log in to your Crackberry Appstore account (BlackBerry Apps My Account - Crackberry BlackBerry Apps Store, or just click My Account on the AppStore page and it will go to the same place).
Once you're logged in, click on My Profile. Phone number is at the bottom of your profile. Change it, click Update, and go start buying stuff.
i didnt find it or i am doing something wrong someone walk me thru it please
Using your bb browser go to wap.crackberry.com � select APPS � select My Account � Enter your login information and Login � on the top page of your account select Change � then fill out the info required and select Submit.
Then you'll have to wait for email confirmation as soon as your device I'd pin changes.
Posted from my CrackBerry at wapforums.crackberry.com