Mobile router

I've been checking online if there is a mobile router compatible with my P990i Sony Ericsson phone but haven't got any luck. As far as I know, mobile routers work with WiFi enabled cellphones. And since P990i has wireless capability, I thought of researching about it out of curiosity.

I don't use my cellphone a lot though. I only play with it when I am bored and got nothing left to do. Hahaha!