I was able to test for a few moments the other day and had my friend test a hotspot on his Galaxy SIII on T-Maobile and I was able to sign in PSN,
Yeah I think it's my phone. Not sure what other settings there are. Settings > Wireless & Networks > Tethering & portable hotspot. If I go to setup settings it just shows Network SSID and Security is set to WPA2 PSK. Is that what yous is set to Necremis?