If you got your phone for little or no $$ by signing a 3 year term or some such thing, then paying it off is a great thing. Generally, those 3 year terms build in the price of the phone into that contract. So no, your bill will not be reduced, but you are now free to explore other options if you so choose, like other providers offering a better deal. That phone you have is locked to Telus, most likely, so if you change providers, it will need to be unlocked to use with anyone. Telus will do that, for a fee, as will other places. If you dont care about the latest phone, or stuff like that, I would suggest keeping your current phone and explore what plan with Telus suits you. Are you overpaying for services or minutes you never use? Once contract is done, you can scale back if you like, save a few bucks per month, getting a "lighter" service if it is warranted. Hope this helps.
Rick
"Egotism is the anesthetic that dulls the pain of stupidity" - Frank Leahy