* AT&T provided the fastest data downloads, averaging 348 kbps; its average upload speed was 68 kbps. However, AT&T also reported the highest rate of data connection failures: 16% of connection attempts failed. AT&T's average signal was 81% of full bars.
* Sprint's signal was the strongest, 96% of full bars, and its data service averaged 231 kbps when downloading, 68 kbps when uploading. Sprint's data connection failure rate was 9%, slightly higher than its typically reported failure rate.
* T-Mobile reported the fewest number of data connection failures, 3%. Its data service averaged 237 kbps when downloading. Its service was fastest when uploading data, averaging 126 kbps. T-Mobile's signal strength averaged 72% of full bars.
* Verizon reported significantly more data connection failures than usual: 11% of connection attempts failed. Furthermore, Verizon's transmission speeds were not in line with its typical performance, averaging 97 kbps when downloading data; its upload speeds averaged 58 kbps Verizon's average signal strength was 54% of full bars.
