Unlocking iphone 4s At&t more than ones?

Well i purchased a unlock service system on eBay but the seller has not responded so i want to take it to someone else but will it affect the phone because i'm getting it unlocked from some one else when the other person has the same IMEI too will this lock the phone or harm it. To clarify is it possible to get it unlocked twice or will it just not get unlocked the second time.

It won't matter. If you need it unlocked i can for $10

Take it to the apple store they will unlock it and update it as far as it will go, then you can set your security code.

Once unlocked, it won't get locked back if you're doing factory unlocking and not software unlocking.

Make sure you get an iPhone Factory Unlock and not the software unlock. So that it'll be permanently unlock.