Hide an incoming phone number using a custom dialing feature

Question

I have a plan to make a dialing function to hide the caller ID. I have an application with a caller’s phone number built into the Dial button.

In the application, both parties (the caller and the recipient) can see their own numbers.

I use the following code to call by default:

Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:"+mNumberEditText.getText().toString())); startActivity(callIntent); 

My problem is to hide the number of sides. How to do it?