Having unlock code on our iPhone it is something very important, we carry a lot of data that in case of losing our device or that it is stolen could bring us real headaches, the bad thing is that sometimes it is a little annoying be entering the code over and over again.
With Auto Protect this will not happen to you again, because prevent it from asking you for the unlock code whenever you are on a known WiFi network (you configure it in settings). In this way when you are at home or at work you will not have to be entering the unlock code, and it will only ask you when you are on the street.
You can download it free on Cydia, You will find it in the ModMyi repo. You need to have done the jailbreak on your device.