The "Whose Mobile Number" field should be set to "Self" by default to streamline data entry. Users should have the option to change it if required.

Steps to Reproduce:

1. Navigate to the registration or relevant form.
2. Locate the "Whose Mobile Number" field.

Expected Result:

• The field should be pre-selected as "Self" by default.
• User should be able to modify the selection as needed.

Actual Result:

• The field is not set to "Self" by default. (Update if needed based on actual behavior)