Thanks! I downloaded ac display. Works for my needs!You can try an SMS app that has a pop-up over lockscreen feature, such as ChompSMS and/or NILS, which will put notifications and previews over your lockscreen.
You actually don't need a separate app. If you go to the settings in the stock messaging app, under notifications there is an option to set it as a pop-up instead of the 2nd screen.
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