They aren't breakneck speeds or anything like that, but I have no problems watching netflix or youtube with no buffering with the 4g. I'm not sure if my speeds are any different as I don't usually have full 4g signal, but the speeds I usually get are about 2 mbps down and 1 mbps up on a speedtest. I use the hotspot option built into my phone right now to get online as I just moved and haven't had Internet installed here yet (which is funny cuz you would think I could get it right away as I work for the company), so the only way I can get online at the moment is through my phone. Now I have no problems with having to wait for pages to load for a long time or anything unless there is a ton of information on them like a lot of pictures or videos or things like that, but I'm pretty happy with the speeds that I get out of it. I'm even able to stream netflix through my TV if I set the phone in the right spot. However, if I'm streaming to my TV or my computer, the other one can't stream as well, it's pretty well doing everything it can to keep up with one device, but I almost never see it buffer and the couple of times is has, was for like 2 or 3 seconds.