The people who really need HIGH speed are the gamers, which certainly is not me. But, I use the Internet for my tax consulting/compliance business, so our AT&T connection is 1 gigabyte, which, I believe, equates to 1,000 versus your 390. If I was willing to pay big bucks, I think AT&T has a plan that will go up to 5 gigabytes.
The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence