What should I do to get text back when accidentally deleted?

You can recover accidentally deleted texts using MobiKin Doctor for Android:

Install and open MobiKin Doctor for Android on your computer.

Connect your Android phone via USB and enable USB debugging.

Let the program scan your device for deleted messages.

Preview the recovered texts and select the ones you want.

Click Recover to save them back to your computer.

This method works even if the messages aren’t visible on your phone anymore.