To update your registered Mobile Number on the DA app, please follow these steps:
1. Open the DA app
2. Click 'More' and select 'View Profile'
3. Click 'Contact Details'
4. Key-in the new mobile number
You'll receive an OTP at your registered email address first. After verifying this, a second OTP will be sent to your new mobile number. Once you enter this second OTP, your mobile number will be successfully updated.
However, please reach out to our Customer Support here, if you need any further assistance.