About noon every day (including weekends), my 4g slows to a crawl. Speedtest routinely gives <1Mbps download. Right now I'm at 0.73. Strange thing is upload tends to stay higher, 2 to 3Mbps (sometimes less than one but more typically in the 2's). Again, it's only between noon-7pm-ish.  Nights and mornings are more what I would expect (10 to 17Mbps).

This just started when I moved to Fairfax, VA. Right now I'm fairly frustrated with Verizon's service.