Android How to get Phone number from the Dual sim phone

Question

Hello friends in my app i want to show user to their sim phone number but with in dual sim mobile is not give any type number i much googling but not get exact.please help meto get phone number from dual sim. Note following is not working on dual sim to get number:

       String phonenumber = telephonymanager.getLine1Number();

Answer 1

telephonymanager.getLine1Number() does not guarantee to return the Sim number, as the phone number is not physically stored on all Sim cards.

A better alternative is to ask the user for the phone number once, and confirm the same by sending a message to that number.

Here is a better explanation for the same.