This feature is useful when you switch between mobile numbers when travelling overseas.
Login to JESI.
Click on 'Users' from the left navigation menu.
Search for the user. You can search by first name, surname, email or phone number.
Click on the user profile.
Scroll down until you see 'contact details'.
Type in the second mobile number - click 'add mobile number'.
The second mobile number is now listed under 'contact details'.
Decide which mobile number you would like JESI communication to go to i.e. JESI SMS messages - click 'set as active'.