At a different previous job, when AT&T and Cingular were merging and TMobile was the other big customer (company provided US GSM services), TMobile had the repu

At a different previous job, when AT&T and Cingular were merging and TMobile was the other big customer (company provided US GSM services), TMobile had the reputation of being the professional ones. When the carrier I was talking about earlier was taken over, I saw a somewhat poorly organized IT merger, but nothing that detracted from that reputation. The original interactions were on the GSM network side, while the takeover occurred while I was in the application development/e-commerce side of the purchased company. Consumer Reports agrees with my personal experience with each company, and as a customer of Verizon.