What type of plan is it to use internet anywhere you go?

I'm a super noob sorry!

I'm on Rogers Canada and I want a plan that can make me use internet anywhere I go without Wi-Fi in the city. I own a iPhone 4s if you need to know that. Also please put the price/link in your answer

With any iPone you have to have a data plan if it is active, the price and plan depends on you local carrier