ive not had a problem with them. but for some insight from a us cellular store manager.
check a couple of things,
programming being the hardest, if you need help with this pm me, also this should be your last step.
but check your internet settings when connecting.
if you dont have your
MSID@uscc.net as your username and your password being your MSID only, you probably will have data connection issues. its usually not done by default, but it will likely solve your problems.
if you dial ##778 it will be on there. im running mighty mikes rom and its been a dream. never had a problem with stock rom either. im dancing between permanently keeping SPB mobile shell and not. but all in all its working just fine. not a single problem.