Over the weekend, the folks over at Windows Phone New Zealand discovered the "Mango Friends and Family Bundle: Pre-Cleanup" -- the first in a series of two refreshes that promise to clear away any beta updates ahead of Mango's long-awaited rollout. At the time, it seemed like this tool would allow developers to upgrade to the RTM build of the OS, without rolling back to NoDo and losing all of their text messages or app data. Now, Redmond's own Brandon Watson has confirmed via Twitter that this is indeed the case, adding that the update (available in Zune) only offers support to devs who used the Windows Phone beta program. Still, that's pretty reassuring news for all those who jumped on the Mango train a little bit early.

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