I got a new iphone 5s no service?

So all my other phones work my old iphone 4 my ipod my parents iphones… All but mine which i just got today i looked at the sim and its not that i've reset it a few times turned on and off a few times and still no service no bars at all i went outside and walked around and still no service i can have internet but not bars we payed for it but i don't know why its not working help me its really annoying

You should contact apple, or your carrier, did you put the SIM card for activation for the iPhone?