While filling in your ad's info to publish it, before the "Submit your ad" button, it will ask you to fill in your contact number.
If you’d like to add or edit the number after publishing the ad:
- Choose the profile icon (From the top left corner).
- Click on My Ads.
- Chose the ad you want to edit.
- In contacts, click on Edit.
- add the contact number.
- To deactivate the previous number click on Whatsapp and Phone call under the number when they turn white/gray that means they are inactive.
When you finish, save the ad and it will update automatically to the users.