How much would it cost to unlock iphone 4s or 5?

I kind of don't want to do it myself because i'm afraid i'll mess something up or i don't know. I just want to know the price if i went to a phone store to do it? Or wherever with a professional. If its too expensive, i'll just do it myself, but i'm just wondering.

If you want to unlock your iphone to use any service provider that is super easy just go to ebay and buy an unlock service for your iphone. Then conect your iphone to itunes restore and when it finish it will be unlocked simple as that. I recommend ebay because is really cheap for example if your iphone is at&t it will cost as low as 4 dollars to unlock that phone.

You are right about the fact that unlocking an iPhone our self would result in some other mess that would cost more. I unlocked my AT&T network locked iPhone 5 using remote unlocking service from http://www.theunlockarena.com/apple-iphone-5/rs16wp9/ This method of unlocking was safe, simple, affordable and quick. This method of unlocking doesn't require a jailbreak too. You too can try with this method to unlock your iPhone 4S or iPhone 5. The unlocking cost would differ according to the network to which it has been locked to.So, You can visit the side to get a clear idea.