Sends "I'm driving....." SMS to calls that you reject. Message can be customized.
Sends the auto reply only when you are connected to a Bluetooth device, which naturally needs to be your car's Bluetooth.
Just select your car's Bluetooth device in Block 3. You may also edit the auto SMS text in Block 4 to suit your requirements.
For dual SIM, select subscription in Blocks 2 and 4.
Happy and safe driving!