9900 on TMobile with BES Enterprise data plan. Tethering works with USB cable. I cannot get the hotspot to work. I am running v220.127.116.111 / 18.104.22.1684. I try to connect with my iPad and it says "Unable to join the network 'SSID'" Windows laptop does the same thing. Tried it with WPA2, WPA/WPA2 and none. The laptop will almost connect with none, but not quite.