Was Alltel, now verizon, what do I flash?

[Sting32]

The tittle of this question is short, but I havent seen the answer yet.

I am an Alltel customer, well I was until dec 15, when verizon changed my voicemail and relocated the local stores (which still are 60 miles away) and put up Verizon signs on them.

My Pro is an Alltel branded phone, it works like crap now. Should I relock it and send it in for repairs? OR SHOULD I be flashing as if I were a Verizon person nowdays?

I mean it seems logical to now flash as if verizon, but I just am not sure yet.

Thanks guys