When you registered your app with your account name, mobile user name and password it will lock the app to your account and nobody else can use your account. To move your account to a new phone unregister from your current phone and register with the same account information on your new phone. If for an account "Allow un-registration" is ticked the mobile user can un-register without a Username and Password, if un-registration is not ticked the mobile user needs the Username and Password of the account to un-register.
To unregister go to the settings tab and select Unregister, fill in the Username and Password if requested and click Confirm unregister. When successfully unregistered you can install the app and register on the new phone. All data on your old phone will be sent to the new phone!
Unregister without Username and Password
To Unregister without an Username and Password click the Confirm Unregister button.
Unregister with Username and Password
Fill in the Username and Password and click the Confirm Unregister button.