How to buy SMS Credits ?
Enable Free Messaging
1. Open Calculator Pro+.
2.Go to settings
3. Click on “Enable Free Messaging”
4. Enter your phone number & verify it.
Buy SMS Credits
1. Open Calculator Pro+.
2. Click on top-left corner and open the sliding menu as the display in below screenshot.
3. Click on "Payment" option.
4. Click on "TOP-UP BALANCE" and complete payment procedure.