Can you unlock an iphone 4s without service?

My mom recently got me an iphone free from her job ( much to my disdain). I bricked my galaxy s2 so beggars can't be choosers. Anyway the phone is locked to att and the former owner of the phone has discontinued their service. Since my family doesn't have service with Att oustide of internet I don't think I can unlock it via them. Can I unlock my iphone without service from att via a third party?

Yes you can unlock the iPhone. If you need help send me an email.
gemcity@rocketmail.com thanks

Yup you can.here is one third party http://www.simpleunlocking.com/apple-iphone-4s/rs16wp9/ where you can get your iPhone 4s unlocked using remote unlocking service…