Yesterday we saw the developer release of "Mango" for Windows Phone 7. The method requires a $99 AppHub subscription and for you to make a backup of your phone before the flash. It also voids your warranty.

Today, of course, people have already figured out ways around having a developer unlocked phone to flash Mango to it. We want to stress a couple of things first though:

  • This voids your warranty
  • You can't upgrade to the final Mango from this build, so you MUST back up
  • If you loose your backup, your phone is permanently in preview-Mango mode--no going back, no going forward
  • If this flash doesn't work and you brick your phone, it's your fault. Remember, even the offiical method has some issues (see here).

The first method comes by way of WPSauce. In essence, it requires three steps:

  1. Reverting back to 7004 or 7008 (aka pre-NoDo) by using your backup in Zune
  2. Using ChevronWP7 to unlock your phone
  3. Downloading and installing the official Mango update tools

We won't link to the files here, but safe to say you can do a little sleuthing around to find them yourself. This method at least will create a backup of your device (which you should also backup) and allow you to go forward once the real Mango update comes out this fall. Of all the ways, this is the safest (though still risky).

The second method comes via Windows Phone Hacker. It does not require you to revert back nor have a developer unlocked device. It basically will "...provision your device to receive beta updates. It requires the Windows Phone Support Tools to be installed, and your device needs to be updated to NoDo or beyond". Note: it does not create a backup, but you can do it yourself.

Once again, we caution you to hold off on doing this, at least for a few days. Wait till others have tried it, wait till Microsoft responds, wait till we know more about what is happening here. The second method is certainly the most risky and no one wants to hear your story about how your phone broke because you did this, so patience is a virtue here.

Source: WPSauce, Windows Phone Hacker