Using your BlackBerry smartphone as a tethered modem is a great way to get connected to the Internet when you don't have access to another network. But it requires the right equipment, and the right data plan.
Before you get started, you should check that your phone can be used as a tethered modem. BlackBerry's Website has a list of supported phones.
If you don't see your phone on the list, check with your carrier to see if the functionality is supported.
And, before you do anything, you should check the details of your phone's data plan. When using your BlackBerry as a tethered modem, you'll be transferring lots of data, so you'll need an appropriate plan. And remember, even if you have an unlimited data plan, it still may not support tethered modem use. You may need a specialized plan from your carrier. Check with your carrier to see if this is the case; it's better to know ahead of time, so you don't get socked with a huge bill later on.