Cintreuk

You may find that no matter how many Windows Live ID accounts you link, you can never change the first ID that you activated the phone with. This ID is used to keep track of Marketplace purposes etc.

If for some reason you want to change the main ID(to avoid getting XBL bans etc), the only official way would be to go to settings and reset the phone, which will wipe ALL data and restart the whole activation process. This is troublesome as all your save game data will be lost.

However there is a way around this, but you will need a dev-unlocked device. Please see Jailbreaking section for details.


On the handset:
1) Using a registry editor(such as WP7 root tools), change these values:

[HKCUSoftwareMicrosoftActiveSyncPartners{B2830 118-7BC6-4A74-8C9A-3D8B9CEF88E0}]
"Email"=your_new_id@hotmail.com
"User"=your_new_id@hotmail.com
[HKCUSoftwareMicrosoftIdentityCRLEnvironmentPr oduction]
"DefaultID"=your_new_id@hotmail.com

2) Reboot phone
Now youre on your new LiveID email without factory reset!



Known Issues
There is an issue when updating apps/games. When you try to update, an error message will pop up, saying that its not in your purchase history and you have to purchase it again. If its a free app go straight ahead and "purchase" it again! If its a paid app, well then youre out of luck, sorry about that.
Hope many will find this guide useful.