You can do Nokia Lumia 800 jailbreak legally, the unlock works very well. You will use your Windows Live ID for unlocking your Lumia 800 and this full jailbreak solution is supported by Microsoft. Follow the step given on the ChevronWP7 lab website for completing the unlock process for the Windows mobile.
If this is your first time you need to sign in with an existing Live ID and register for a ChevronWP7 profile. If you don’t have Live ID you may create on msn.com.
Click on Link below to open Chevron Lab website to start unlock Lumia 800.
Visit THIS LINK for more information on availability of unlock tokens.
Enjoy the unlocked Nokia Lumia 800.