PS Vita Wi-fi and tethering

Solution 1:

Using my phone as a wifi-hotspot had enabled me to access everything I've tried so far, which includes the store, friends, chat, trophies, and online scoreboards in-game.

I've yet to try a multiplayer game through it, but will test it later.

Using:

• Samsung Galaxy Nexus
• PS Vita Wifi
• Tesco Mobile contract sim (UK)

Solution 2:

While I haven't got a PSVita to test, I have used a multitude of WiFi devices (PSP, computers, iPads) with my Androids WiFi-tethering without any problem.

Since the phone will present itself as a regular WiFi hotspot, the only potential problem source is your provider (that may, or may not, block certain services).