I have an iPhone 5s that I'd like to sell, so I can buy the iPhone 6s mini in a few weeks or so. (in the mean time I'll be using my iPhone 4) The problem is, that there's a SIM-lock on my phone, making it difficult to sell it abroad, over eBay. Unlocking it costs so much that it isn't worth it for this phone, so I was looking for cheap solutions to unlock it. Sadly, there doesn't seem to be any, and everyone is asking pretty much for this. So in that shop I was told that I could jailbreak the phone, and that this way, it would be unlocked, and then, to not sell it as a jailbreak, I could simply restore the original OS on it. This way, I would have an unlocked, not-jailbroken phone to sell. Is that true? Does it really work like that?