If i use headphones at my iphone 5s will it damage the phone?

If i use headphones at my iphone 5s will it damage the phone? - 1

Yes, you can use regular headphones instead of earbuds. The phone's built to handle it.

No, it will not damage the phone as long as the end of the wire is 3.5mm

Not usually, as long as they have a standard mini-jack.