I see from your profile that you have the 9500 storm.
I can tell you when I had my Storm 9530 on T-mobile the difference I had to watch out for was the EDGE turning to edge which some people do not know but edge is just for voice calls and EDGE is for voice+data.
If you go to manage connections and turn off your radio and then turn it back on it can sometimes kick it back on.
I had to do this once or twice a week with the storm's radio being unlocked and all.
ha sorry should have been more clear. Radio is the actual phone part of the device.
I was referring to turning all connections off & then clicking restoring the connections.
But glad you fixed it. It was a pain sometimes. & for the other guy no need to do a battery pull to fix this, sometime you just lose the EDGE connection and it needs to be restarted. Not the whole phone.
I had this problem one time when I first got my storm. I did the same thing disable all connections then enable them again havent had the problem since