Looks like Verizon getting their 4G out as well their just using LTE instead of Wimax. Which in the long run there a good chance they might be back wards compatible. Then it will come back down go with the carrier that has the phone you like and which one as the best monthly price for you.
Verizon's LTE 4G Expansion Plans: One-Third of Americans Covered This Year - lte - Gizmodo
Verizon's LTE 4G Expansion Plans: One-Third of Americans Covered This Year - lte - Gizmodo