As for your case, make sure that
However, If you have set the backup of your Viber message then you can restore the messages from the backup.
Below find out how to create backup:
- Go to More Screen.
- Click Settings. Choose Viber Backup.
- Click on Back up.
Now, find out how to restore
- Go to Viber Backup tab.
- Check available backup. Click on Restore.
- Select RESTORE NOW.