Phone Hotspot blocked?

[Tpar]

Unfortunately, a 3G or 4G Phone connection may or may not work. I've not had the problem personally, and I have connected successfully via a Netzero hotspot, but the Netzero hotspot is not available in all areas of the country, and is definitely not available far away from civilization.

You might look at your tracert, as was suggested above. I do know, from anecdotal evidence, that after the switch to the new servers, some people who could connect at 4G through their phone were not able to, but were able to successfully connect using 3G.