I have a U301 3G/4G card. When it starts up there is no problem, connects to 3G. When I switch to 4G, it goes through initialization, searches for a network, I get 3 or 4 bars, it starts connecting and then it says WiMax Radio Turned Off. Has anyone else had a similar problem. The 3G works great even after this, it switches back to 3G and no problems.
U301 does not like 4G very well, based on the few times I've been in a 4G area. It kind of works for 3G though; and much better than the U300. Much, much better. Trade in the U300, which if like the one I had, is barely functional.