Q: I am with a major carrier, why haven’t I received a confirmation sms?
A: Major wireless companies are always looking to expand their networks. Buy-outs and mergers of and with smaller companies very commonly has your major carrier brand attached to slower, older equipment. While they’re selling you AT&T 4G speed you may be receiving the old Cingular 3G service. This is really a whole other discussion but the common reason for connection problems. This is resolved in the same fashion as the question above.