1.Go ahead and select the desired old messages from the list, and click "Recover" to save them on your computer.
2.you can click on the "Messages" category on the left-hand side, and see a preview of specific text conversation on the right.
3.From the pop-up, choose Erase Now. Your iPhone will take a few minutes to erase all of data and restore to factory settings.
4.When you see the Apps & Data screen, Tap the first "Restore from iCloud Backup" option.
5.Repeat the same steps to turn off Messages in iCloud on your iPhone. When a notification pops up, select Disable and Download Messages.
6.Proceed to Choose backup screen, then choose the backup you want to restore from in iCloud.
7.Check the time stamp of latest backup. If it's made before you deleted the messages, you're lucky enough.
8.To retrieve old text messages from iPhone memory, connect your device to computer with a help of Lightning cable and launch the program. You will get a main screen shown below.
9.When that's finished, you're prompted to set up your iPhone. Follow the on-screen instructions until you get into Apps & Data screen.
10.Choose Restore Backup. This will restore all data in iTunes backup to the iPhone. Your old deleted messages should reappear in the normal text messages list.
11.The restore process begins. If there is a long string of text conversations included in the backup, it will take a few minutes to restore them back to your messaging list on iPhone.
12.Log into your iCloud and access the backup. Select an old backup you want to restore deleted texts list from.
13.Open iTunes, and click iPhone icon on the upper-left corner of the window. In Finder, select your phone from the left menu.
14.Once logged in, uncheck other types of items, click the blue iCloud Backup, followed by Start.
15.The program will start searching for backup(s) you created in iCloud server and finally list them on the window, like the image below.
16.When it's done, click the "Messages" category located on the left menu. You can preview any backed up message conversation by click the specific name before the phone number.
17.Click Standard backup. Or select Encrypted backup if you want to keep the data secure.
18.When you see the device icon appear in the top left corner, click it. In Finder, select your device name under Location on the left side menu.
19.Sit back and wait for the tool to scan your entire device. Once done, it will sort all files into categories on the left panel, and give you an overview of the how much data is there.
20.Confirm the action by logging with your Apple ID. A few minutes later, you will be greeted with a HELLO screen prompting you to set it up as a new device.
21.Select the device icon on the top left when it's detected in iTunes. In Finder, Select your phone name under Location on the left sidebar.
22.Launch iTunes and connect your device to the computer. If you're running a Mac with Catalina 10.15 version or above, open Finder app.
23.Connect your phone to computer, and open iTunes. If you've upgrade your Mac to 10.15 macOS Catalina or newer, open Finder.
24.To restore messages and attachments, click "Messages" category and "Messages Attachments" category on the left and then select the messages threads you need back.
25.When ask you to sign in to iCloud, type in with your Apple ID and password.
26.Sign into your iCloud account with Apple ID and password. The program won't save any of your information.
27.Wait for the sync to run. Uploading your old texts to iCloud takes a few time to complete, so you have to stay signed-in to your iCloud account the whole time.
28.Click "Start Scan" to take a deep scan on the device. Be patient, as the whole process might take a while. Once the scan is end, you will get an overview window, indicating how many of data files it found.