Hey i have a question regarding network unlocking a iPhone... I picked up a A1661 iPhone 7 Plus off of marketplace for a client looking for their first ever iPhone and it was sold as "unlocked", but after trying my Verizon sim in it, it never gets past the activation screen with error says sim not supported, and looking under settings - general, it shows as sim locked. How do i go about unlocking a A1661 Iphone 7+ that was originally on AT&T. I tried the AT&T unlocking website, and it comes back as being on another persons account, and to unlock it they must remove it from the AT&T account. I called AT&T and because i do not know who's account or phone number its under they cant do anything for me. I made the assumption that since its a A1661, its automatically unlocked, and i did not look for sim lock when buying it. oops. I did try my back up AT&T sim in the 7 Plus, and it works perfectly, even though its a MVNO of AT&T, but the client has Verizon, so that will not do much good haha. Are these unlock websites any good? such as Sim-unlock.net? Should i even try, or start over from the beginning with another device, maybe one that's newer? I did update it to iOS 15 for 14.7, and it runs pretty well, but i cant imagine apple supporting it for much longer. Thank for your input.