is that what you are using now avro? the warp?

At this time, the best phone that Public Mobile has is the ZTE N860 Warp. It's a big phone with a 4.3" screen and a Qualcomm ARMv7 CPU running at 1GHz. I have this one and it is fantastic. Second to that would be (IMO) the ZTE N762 and third would be the UMX MAX. There are all smartphones and it depends on your budget. The N762 is the cheapest (currently $79, on sale for $59) and it's a great one if you've never had a smartphone before. It was my first and I still love it. Having said that, if you can afford the N860, go for it, it's worth it.

you could check out all Public Mobile phones specs and reviews, it might help to make a decision.