I have a Treo 650 with full Vision. Just got the 700p and Blazer seems a lot faster. Am I using Power Vision/EVDO? (I live in a major metro area). Do I need to call Sprint and upgrade to "Power Vision?" Am I getting it now already, or do I need to upgrade? If I upgrade, will everything be even faster? I don't think I care about TV, etc. -- just Blazer.