Using cell phone as modem, where to find phone number of ISP

Hi,

I’m trying to use my cell phone (through Metro PCS) as a modem for my laptop.

However, I’m having trouble finding the phone number of my ISP. (Am I supposed to use my actually phone number?) My user name would be my phone number @metropcs.com and my password would be what I use to access my account online, right?

I tried looking for the info on my phone, but can’t find it. Does anyone know anything about all this? I do have both my phone and computers paired up and connected to each other through bluetooth. So that’s a good start, eh?

Thanks!

Jen