Activating An iPhone 4s With No Sim Card?

So I bought an iPhone 4s from my friend and its restored to factory settings. The problem is it has no sim card in it and I can't get passed the activation screen without a sim card. I heard you can just borrow someone else's sim card, put it in mine, and get passed the screen and then give it back to them after, is this true? But any information will help a lot, please.

I think that is possible, you just won't be able to use it's cellular functions (make calls, use cellular data etc. ) but you should be able to use it via Wi-Fi.

Yes that will work