Is it possible to take a v710 that was a Verizon phone and have your Alltel number transfered into and it work properly? I was told that you could not go from Alltel to Verizon because Verizon actually uses some of their towers and as soon as it picked up one of Alltel's towers it would put their programming back into. I overheard a Verizon sales guy tell this to an existing Alltel customer. Wonder if that is true?