Im currently on T mobile and have been for 18 months now - changing in a few weeks to another network.
I seem to have trouble getting a signal in certain places. rang t-mobile and was told to change me settings from 2g to 3g. helpful maybe if i knew what he was talking about. I went to my settings as explained but it only came up with the networks - not what signal i could get.
So got fed up with only getting limited signal for emergency use only and have changed networks from june