AT&T user here was on the "4G" network with the 4s... was happy overall having broadband speeds on the go, however I use tethering with my MBP so it's always been a relief to get back home on the 30MBps connection. NOT ANYMORE!!! wow... this LTE stuff is just amazing. Getting 24/15 average up north of San Diego. The lag is hardly noticable now. Happy to pay for technology that works great.