Clear wire device do not have speed caps..
Clear wires sub modems have a speed cap of 6 down 1 up.
Clear wire sub mobile devices have a cap of 4 down 1 up.
When your phone acts as a modem speeds up to 6 down and 1 up
As the build out progresses signal will become more widely available. They are doing equipment and eventually early next year software up grades.
It will be 6 more months before you see decent coverage, next summer before its work talking about
The new markets have it the best, NY, LA, FL, Tenn etc. They have newer equipment and some minor tweaks, additional microwave for back haul, Better fiber etc
Older markets will have to be gradually upgraded..