Maybe someone has an idea of why/how my iPhone is unlocked. I picked up an iPhone for cheap on eBay (UK) with a broken home button. As it turns out, it has a number of broken buttons and is a US model. The buyer stopped responding, so I went to the Apple store to get required paperwork for Paypal to refund. So, it turns out the phone is still locked to a US network, but my 3 sim works in perfectly fine, I made calls with no problems. The iPhone is on 6.1.4 so that rules a jailbreak out. I'm not using a piggy back-sim. The phone has been opened by the looks of it (perhaps previous owner opened it since he couldn't get button fixed under warranty in the UK). Thoughts anyone?