Mobile number change

one of my friends is sifted to abroad and he needs to change his mobile no is that the possiable link abroad mobile number to his Zerodha account.
and he has tried to change it online but the online process only accepting India mobile numbers.

You can submit an Account modification form and get it updated manually, But CDSL and Exchange do not provide the SMS facility to an overseas number. Hence, I recommend that you should get an Indian mobile number.

But it is not indian so I think it is not possible to send sms in abroad now I got my answer by the way thank-you for your reply