http://developers.de/blogs/damir_dobric/archive/2011/02/02/how-to-change-identity-information-on-windows-phone-device.aspxIf you have a registry editor for Windows Phone, you can use it to change identity information. Following keys are currently available under hive HKEY_LOCAL_MACHINE: Desc , FriendlyName , Name , OrigName and UsernameenCommunityServer 2008 SP1 (Build: 30619.63)