[RonDutt]

High chance after a week or two you'll get a call from the TS agent telling you the request was denied (you're lucky if you get a call, I just had a voicemail magically appear). Sprint phones *ARE* blacklisted as far as I've been able to check...Now matter what tier of support, any mention of Sprint phone on Verizon and they hurry to get you off the phone. Argue and they nicely start repeating themselves over and over until you tire and hang up.

As for Alltel phones:
If the phone is compatible and no longer on service with Alltel, Verizon will add the ESN/MEID and activate it (via phone, can't be done OTA).
If the phone is Alltel and NOT compatible with Verizon, they will swap the phone for a close cousin.
If the phone is Alltel and still in service with Alltel (via contract), Verizon won't accept the phone or service and tell you to wait until May 3rd March 31st July 2nd etc etc. No tech seems to know an exact date, they all pull a random one out their asses. March/May 3rd seems to be a common one so that might be it.