Is there an iPhone 5S unlock (IMEI or carrier, I don't care which) that I can get done in less than a couple hours? It's an AT&T iPhone running iOS 7.0.4. I haven't had much luck finding anything so far. Also, I'm using a Mac.
In less than a couple hours? Doubtful. The fastest I've ever gotten one is six hours, and that was back when it was still legal to privately unlock phones that are still under contract. If AT&T subsidized this 5s, you'd have to find a vendor on eBay that's willing to unlock it illegally. If you paid full cost or have fulfilled your contract (bought another phone through AT&T since the 5s and paid full cost for it), AT&T will unlock it, but it's a slower process than eBay. If you cancel your account and pay your ETF, AT&T will unlock it for you. Are you switching to T-Mobile or selling it/trading it?