Rogers & Fido customers received some good news this week when it was
announced that their tethering policy, expected to be phased out on May 3rd, would be extended indefinitely. Customers with a data plan of 1GB or more will be able to share the internet connection on their smartphone with their laptop.

Tethering on a BlackBerry Smartphone
Rogers has a great step by step guide on how to enable tethering for your BlackBerry Smartphone
here.
Tethering on an iPhone 3G or 3GS
Apple has a great step by step guide on how to enable tethering for your iPhone 3G or 3GS that can be found
here.