How to retrieve deleted text messages from iPhone 6

If you have an iCloud or iTunes backup that contains ten deleted messages you can restore the entire device with that backup. Otherwise, there is nowhere to retrieve messages from.

Again, the only place to get them back from is to restore the entire device from an iCloud or iTunes backup.

Only if you have made a backup!

What about Apple 5 if you need to retrieve deleted text messages.

5, X and everything in between; same answer.