I had (broke it last night) a Sprint TP on Alltel during the merger. I tried to worked with Tech support to see if I can used the EVO circuit, I can only use 1x for Data (this was stated in a previous Post issue.)
Getting to your Posting, I dropped my phone and got it replaced with the Verizon XV6850 version
, and what I was told about data and features is, since I was still on an Alltel version of the Friends and Family that not all features in the service areas would work. This maybe your answer but I am not sure.
All I can tell you is to contact Tech support and Tier 3-4 support will return your call and try to upload a service pack to your phone. This conversion isn't going as they planned, as there having issues with phones and rolling services.