I have the EVO 4g, and the 4g is somewhere between worthless, and a handicap. If I leave it on, it sucks down the battery VERY quickly, and turning it on and off gets old quick. I can do everything I need it for with 3g. I have not jail broken it as I don't need tethering. 3g EVDO works just fine. I do know about the 5gig cap on 3g, where as 4g does not have a cap. I got it for the 1ghz, Android, and 4.3 screen to replace my palm pre. The 4g-wimax chip also does the wifi, and has a max power usage of 350ma. Wimax on a phone just can not go through buildings well enough to be a turn it on and forget it without killing a battery. Now at home I have a larger more powerful Wimax modem for home use, and I have 5 hardware computers, along with 10 or so VM's all sharing a single 3Mpbs/1Mbps Wimax connection, and other then ping times in the 100-350ms range, it works just fine.