You may not want to see the little preview of text messages that turn up on your home screen when a new text (SMS) message comes in. To turn this off, head to your iPhone settings and go to:
General -> Passcode Lock -> Show SMS Preview
Turning off 'Show SMS Preview' will disable the text message preview on your iPhone. You'll still get an alert that the message came in, including the sender's name/number, but none of the message will appear.








This is incorrect. I still see previews of text messages regardless of whether the "Show SMS Preview" is on or off. I can't stand this function. Can someone please help me fix this issue? thanks!
You have to enable Password Lock.