Verizon to upgrade all of its DROIDS to Android 2.2 at one time?This article contains unofficial information.
As for the date of this simultaneous upgrading, August 23rd has been mentioned as a possible launch date for the DROID 2 which is expected to launch with Froyo under the hood. That could be a good time to introduce the OS on all four of the high-end devices. Another possible date would be August 16th, when Adobe is supposed to have an Android-related press conference. Considering that Android 2.2 is a requirement for Flash 10.1, it would also seem to make sense for the upgrade to be launched at that time. A tipster for AndroidSPIN who claims to work for Verizon has said that the Android 2.2 upgrade would begin Friday, August 6th, and be completed by the 15thb of the month. He claims that Big Red would upgrade the DROID, DROID X and Droid Incredible all at the same time as the DROID 2 would ship with the newer OS.
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source: AndroidSPIN via AndroidandMe