I certainly agree this is a problem with AT&T, but if they're throttling all Tesla data, why are 3G cars unaffected?
Also, I think it seems kinda strange to buy cellular bandwidth "by the year" so to speak. If anything, it would be a yearly contract with a monthly cap.
I also believe we can apply Hanlon's Razor to this problem: (see:
Hanlon's razor - Wikipedia)
"Never attribute to malice that which is adequately explained by stupidity."
Or as another TMC member taught me the British/Aussie version:
"Cock-up before conspiracy"
By that I mean that it's not an intentional thing by Tesla or AT&T (i.e. bandwidth limits), but it will turn out to be some sort of mis-configuration in the LTE firmware in either the AT&T cell towers or in our cars.
Which come to think of it, are Canadian owners with LTE experiencing the same problems, or is it US only? If it's US only, it's most definitely an AT&T problem.