unlock a second-hand iPhone

Hi, I just share three methods to unlock a  second-hand iPhone without passcode. Hope you can like it!
 Nowadays, many people like to buy a second-hand iPhone because it is a nice way to save money. But sometimes the previous owner still has the passcode on the device. If you want to use it, you need to unlock it first. For this issue, three methods will teach you how to do.
One is to put iPhone into recovery mode and then restore it with iTunes. It is an official way to solve this issue.
Another is to use iCloud to unlock iPhone. But this way is conditional. You need to enable Find My iPhone in advance.
The last is to ask an iOS passcode cracker for help. There are a variety of professional unlocking tools in the network market. You can select one that works for you well.
May this be helpful to you all!