Step1: Move messages back to native inbox

1. Open App.
2. Press and hold on conversation or contact.
3. Select “Move Messages Back to Native“

It will give option to move all private messages back to native inbox.

4. Repeat this step for each contact.

Note: MMS messages will not be moved back to the native inbox.

Step2: Import Contacts with messages to Calculator Pro+:

Install AdvanceSMS:

1. Install AdvanceSMS from here.
2. Open AdvanceSMS.
3. Set AdvanceSMS as your default messaging app.

Install Calculator Pro+:

1. Install Calculator Pro+ from here.
2. Open Calculator Pro+.
3. Tap on “Add contact“
4. Import contacts by Clicking “Contact” or “Messages“
   OR
   “Enter contact number manually”
5. Now “Save the contact“

Now all your messages will be hidden inside Calculator Pro+ from native inbox.

6. Repeat this step for each contact.