You can lock text messages, as well as other personal data, on your iPhone without jailbreaking your phone and voiding your Apple warranty. The iPhone is shipped with the “Passcode” feature. When you enable this feature, you will need to enter the passcode to reset your phone, to wake the phone or to turn the phone back on after restarting. Be sure to remember your passcode because you will need to reset the phone to factory defaults if you forget it. Writer Bio
