I have two cell phones with two different providers. My work phone and service always works everywhere. In the exact same locations the Metropcs service fails on all fronts. Texting often gives "message sending failed". Calls get dropped often and reception is often poor.
It is almost impossible to get an international line. In two months, I have had to keep trying every few minutes for 15 to 20 minutes to get a line and even then you cannot be sure that your call will get through.