Sorry if this has been answered already but I did a search and found nothing...as the "X" is over the search button and won't let me....lol
If you receive a text or call and it's on your lockscreen as a notification, all you have to do is tap and hold it, drag down to the bottom till the clear box fully appears and let go. Then tap the actual notification at the top and it will take you directly to the person in the messaging app or to the person who called so you can call them back.
I found this by accident and it's a crappy way to access this but it works.
If you receive a text or call and it's on your lockscreen as a notification, all you have to do is tap and hold it, drag down to the bottom till the clear box fully appears and let go. Then tap the actual notification at the top and it will take you directly to the person in the messaging app or to the person who called so you can call them back.
I found this by accident and it's a crappy way to access this but it works.