Can I update my iPhone 4S without using any cellular data?

I'm almost over my limit and I really want to update my phone to iOS 7.

No, you will need wi-fi connection or 3g/4g/LTE

Don't do it. Wait till you have Wi-Fi because my iphone 4s took about 4 hours to update…
ios7 isn't worth it anyways, it just kills your battery fast and is kinda complicated

Wi-Fi