Rogers Pay as you go
 

For pay as you go, do they use the same sim cards or you have to buy a complete different phone and sim card?

I believe there is a way for you to use an existing simcard? and you can use an existing phone as well.

u can just use the same sim/phone if u just migrate to pay as u go...but its the same tech so the sim cards are just the same type of sim cards

u can use the same phone number and sim but there is a fee to do so and only customer service can do it.

but for pay as you go do not use a different type of simcards and you do not need a pay as you go phone...those are just there for pay as you go customers who don't wanna get the contract phones at retail price.