But what if you don't have a iTunes backup, well, don't worry, we can still restore lost iPhone messages with Amacsoft iOS Data Recovery. Now I'll guide you How to Resume iPhone Messages withou iTunes:

Step 1: Connect iPhone to computer and start the problemFirstly, connect iPhone to computer via USB cable, then start the Amacsoft iOS Data Recovery, there will be an interface ask you to start the scanning, you just need to click "StartScan".

When the scanning is finished, you'll see some detailed info of your device. Just like the image below shows.

Step 2: Preview messages and start recoveryAs you can see, all contents of your iPhone has been listed in the left. You just need to click "Messages" to preview all of your existing and deleted messages, and they will be distinguished in different colors. You just need to select and check those you want to recover, then click "Recover" to start the recovery.

OK! That's all! And the recovered messages will be saved as TXT format on your computer.