LiveID phone can be changed without doing a full factory reset.
On the desktop:
- Go to the website http://account.live.com and login under the old account [email protected].
- Change your Windows Live ID (use any existing account or create a new one [email protected]).
- Save the changes and login under the new account [email protected].
On the device:
- Use the registry editor to the following modifications:
- Restart the phone.
All Windows Live ID changed without a full reset!
The ID change can be made using IDswitch
PS: This way you can change only the ID, not the region, because the Microsoft billing information entered during the initial registration.