I know there are several threads about this, but I'm wondering if anyone can share information about using any third-party unlocking services when still under a monthly installation plan (not contract). I'm on AT&T Next and don't want to pay off the phone to be eligible for an unlock because it's the free line on a "buy one get one free" promo. I have upcoming travel and would be happy to use a third-party service, but sometimes the wording isn't clear and they don't specifically state what happens for phones under a carrier installment plan. Note that I have no issues with a blacklisted phone or iCloud locked phone, just a carrier lock. Thank you!