Does the iphones screen still work without a sim card?

I found an old iphone and it has no sim card. But the screen doesn't work? Is that because it has no sim card? If not how can i get the screen to work?

The i phone does work with out one i'm currently using a iphone 4 with no sim it just is like a i touch at this point

Yea, but without a sim card, it's pretty much an iPod Touch and solely operates on Wi-Fi

Of course not beacause of the sim card, the screen just broken I guess