You really do not want to connect to the internet through your phone unless you have a data plan. But I doubt you can connect in tethered mode if you have not arranged to do so. A software "hack" to your phone may change that ... so ....

For Verizion ...

The data is charged per 1K if you do not have a plan (0.15/K if I recall). So it gets VERY expensive!

You can only use the internet connection with your phone software if you don't have the data plan (and even if you do).

Connecting through your phone with another device cost $15 over and above the monthly data plan charge. They call it a "fee", but it is every month, not a one time deal.

The data plan + tethering is over priced (if you ask me ), but I pay it because I need it (probably will change carriers when my time is up). It is also far less expensive than any other choice I have.

Ken