Compare that with all the graph AT&T released last week, however, charting weekly rates throughout Q1 2019. For most of the quarter, matters are still neck and neck, but the rates of AT&T shoot up. Was AT&T’s network? Since Ookla clarifies, no.
It is a part of an upward trend for AT&T, that has spent the previous year with dramatically slower speeds than competitors T-Mobile and Verizon, for a very simple reason: the business was far slower to embrace the more recent LTE technology (things like MIMO — several antennas arrays — and carrier aggregation) than its competitors were. As AT&T’s network caught up, so did its speed tests, to the point where items are once again neck and neck, as seen in Ookla’s graph.
Now, it is true that AT&T failed to have the quickest mean broadband rates that are mobile in America in Q1 2019.

But there’s just one problem: as Ookla has taken the opportunity to point out in a blog post, AT&T’s claim isn’t nearly as resounding of a success as the firm has announced.

Yes, AT&T’s community has been getting better, and is slightly faster as a whole now. Nevertheless, as the announcement of AT&T would suggest it is not nearly as dramatic of a rise, and once numbers start to normalize things will continue to look moving forward. And no amount of 5G E marketing hype will be able to change this.

Image: AT&T (through Engadget)
AT&T’s chart lacks an X-axis, but this apparently is monitoring speeds per week by Q1 2019

To put it differently, iPhone customers on AT&T got the upgrade, saw the icon, did speed tests to see what sort of speeds they were getting, which added a whole group of new, quicker speed evaluation information that juiced AT&T’s amounts for the final week of Q1. And, being Ookla notes, because 70% of AT&T’s clients are iPhone users — compared to 49 percent on T-Mobile and 62 percent on Verizon — which bulge from iOS users attempting to figure out whether 5G E was really quicker than the LTE they had the day before (spoiler: it’s not) was even more important.
Instead, the business notes that”At the final week of Q1, we observed an increase in faster evaluations taken on AT&T’s network. Upon analysis, we found that this connected with the launch of iOS 12.2 and the roll from AT&T’s 5G E icon” And as Ookla told The Verge past week, the increased variety of speed tests came especially following the launch of iOS 12.2 (which included AT&T’s 5G E star ) and especially from iPhone XR, XS Max, XS, X, 8, and 8 Plus devices (the mobiles that now display 5G E support on AT&T).