Wrong AT&T does not have 4G even their LTE is still considered by the industry to be 3.99G.I don't either, T-Mobile doesn't even have 4g.more like faux G.
AT&T has 4g but not tmobile
Fact 1: t-mobile HSPA is twice as fast as AT&T. Averaging 6.30Mbps
Fact 2: t-mobile HSPA+ is twice as fast as AT&T. Averaging 10Mbps
Fact 3: t-mobile (3G AWS) is as high as 34Mbps
I can go on if u like.