I have an AT&T Note. Both phones of course get AT&T's "4G." With both of these phones I have regular issues of data slowing to upwards of 3000ms Ping, speeds around 10-150kbps download, and 10-50kbps upload. How is this possible? It's driving me nuts, because when the damn thing works, it flies, but when it doesn't the speeds are so slow it is pretty much unusable.
EDIT: Also, on my phone the ping is always around 190ish when working well, whereas his is usually around 95. We do not live in an LTE area.