Will modifying QQ mobile phone binding send SMS to the original bound mobile phone?

You can't text. First of all, you should use the previously bound mobile phone to call the SIM card operator to unbind the "simplest manual cancellation service". If you don't want the mobile phone holder to know, you can remove the password or ID number of the SIM card that was previously bound to the mobile phone and call the operator with your mobile phone to help it cancel. You will be prompted to enter the password or ID number of the previously bound mobile phone. Now just bind it with the phone you want to bind.