Activating an iPhone 5s with a prepaid sim card?

I bought from a friend an iPhone 5s 64gb, but since he factory reset the phone and took the sim card, I can't activate it. If I go to Bell Mobility store and buy a prepaid sim card (5$ it says on website), will I be able to activate it, or do I need a plan? Also, is there any way to bypass it?

You can buy the prepaid SIM and activate it.

Is your phone unlocked? Because your iPhone needs to be unlocked before you can use different carriers. But before unlocking your phone, you need to do a "jailbreak" on it.

Prepaid card? No. That's the whole point. They don't have contracts. Prepaid means you buy what you need and load it monthly. If there's no shady catches, then activation should work. Friends tossing around 64gb 5Ss just doesn't sound right. Best luck.