According to RootMetrics, Verizon is still the most reliable network in the US. This study actually covers the second half of last year, and is based on millions of tests conducted by RootMetrics at the city, state and national levels. This essentially means that the study should be pretty accurate, which is why it's held in such high regard, for the most part. Well, it seems like Verizon's LTE-Advanced service which they kicked off back in the summer of 2016 did them some good, as it did boost their performance by increasing the network's download speeds.
That being said, Verizon managed to score 93.9 on RootMetrics' national rankings chart, while AT&T is not far behind, as it managed to hit 90.5 out of 100. Sprint managed to claim the third place on a national level by scoring 84.7, while T-Mobile is placed for with a score of 81.2. Interestingly enough, Verizon takes the cake in pretty much every category according to RootMetrics, not only did they claim the overall win, but are ranked no.1 in reliability, speed, data, call and text rankings as well. AT&T is placed second in most of those categories as well, though Sprint did manage to trump AT&T in the call category, as it claimed no.2 spot with a score of 86.4, while AT&T scored 84.6. Interestingly enough, this is also a category in which T-Mobile isn't exactly on par with Verizon, Sprint and AT&T, those networks scored 90.1, 86.4 and 84.6 in the call category according to RootMetrics, while T-Mobile managed to hit only 67.2.
So, all in all, Verizon is still the number 1 carrier in the US according to RootMetrics, while AT&T is close second, as it did really well in pretty much every category. Sprint and T-Mobile also did quite well and managed to keep up, though T-Mobile did drop the ball in the call department compared to the other three carriers, at least according to the source. RootMetrics performed almost 3.7 million tests, they drove almost 250,000 miles and stepped into over 4,000 indoor locations in order to test US networks, in case you were wondering. If you'd like to take a look at RootMetrics' full report, follow the source link down below.