Setting up a password on your iOS device is important if you keep a lot of personal information on your device. If you loose your iPhone, whoever picks it up has access to all that information. Also helps against your little brother picking up your device and changing your Facebook status.
Setting up a passcode on your iPad, iPhone or iPod is very simple. Open settings on your iOS device -> General -> Passcode Lock -> “Turn Passcode On”. It will ask you to input a 4 digit code. Once that’s done your iOS device is password protected. End of tutorial. Nah, just kidding, there are a few other options we can go through once you’ve enabled the password.
You can set it to require a password after a certain amount of time if you like. It can be set to require the password immediately after locking (turning off) the screen, or in increments up to 4 hours after the screen goes off or left untouched.
Also even when your iOS device is locked, by default it is still set up to allow Siri and Picture Frame. So your little brother could still tell Siri to change to change your Facebook status even if it is passcode protected. If you’d like to disable this you can just turn it off. To turn it off go to Settings -> General ->Passcode Lock, and select which app you’d like access to while the device is locked. On an iPhone there is also an option to turn off Passbook and “Reply with Message” from the Lock Screen.
Another feature for anyone that has a lot of confidential information on their device, is to have all the data erased if more than 10 failed attempts are made in succession. If you have everything backed up to iCloud or iTunes you can always restore it.
If you’d like more security than entering a 4 digit code there is also an option to enter a full password with letters. To enable it simple turn off “Simple Password” and you’ll be asked to enter a new password.