It looks like a handful of users of the ChevronWP7 unlock tool, a piece of software that lets you side-load apps to Windows Phone 7, are experiencing their phones re-locking over the air by Microsoft. Here’s what some XDA users are saying…
yeah, the same thing happened to me.
When i clicked the program on my phone. I got a message from MS asking me to uninstall, because the program has been revoked.
same here, tried to start TA maps and MS forced me to uninstall it.
Connected the phone and ran ChevronWP: it’s locked again!
maybe MS pulled the kill switch an re-locked the phones?
yup , I got the same to ,you can unlock it again and then it is working again
It turns out that you can simply unlock your phone again to undo the re-locking. We’re not 100% sure if Microsoft is indeed remotely locking these phones, or if the users are running into some security feature of Windows Phone 7 that prevents tampering with core software.