[lacklustre484]

When you flash to the official ROM it wipes out the A-Key. You have to get a new one from VZW. Dial 611 on your phone (if it still goes to 611) and ask for level 2 tech support. Don't let those numb-nuts in level 1 tech support even try it. When you get to level 2 tech support tell them you upgraded to WM6.5 and lost your A Key and need a new one. It should be 26 digits. When they give it to you, go to the dialer on your phone and dial ##778 then press the call button. Navigate to the section that has the A-Key, hit edit, enter it, and save changes. Phone re-boots and can now authenticate on the network. May happen 2 or 3 times before it sticks for good. Be sure to dial *228 option 1 after it reboots for the first time. Verizon knows about this issue, but its not worth releasing another software patch to fix.