Irving, TX, between 114, 161, and MacArthur.
In the mornings before lunch, I can usually get about 5Mbps download speeds as reported by Ookla Speedtest. By 10:30-11AM, it will drop to less than 1Mbps. I've even seen 0.1Mbps. Sometimes it recovers up to 5Mbps by 3PM, sometimes not. During lunch, there are times I can't get websites to work, and just forget about youtube.
3 of the 4 people on my lunch eating crew are on VZW, and they're having the same issues. The one guy on AT&T routinely gets north of 15Mbps, even during lunch.
Sounds like whatever circuits we're on in the area are oversubscribed. Rebooted my phone? I was doing it almost everyday. I even did a hard factory reset a couple of weeks ago just in case something was messing with my performance. It has been this way for probably 2+ years, I just never knew how/where to report, so here I am.
Phone is a Galaxy S3