Tap on "Link a Device" and then choose "Link with phone number instead." You'll be prompted to enter your primary WhatsApp phone number (the one your account is registered on).

They need to open the linked devices screen and tap on the "Link with Phone" number option. Users who choose to go forward will be prompted to enter an 8-character code generated by WhatsApp Web.

Tap on Link a Device button. Tap on Link with phone number WhatsApp will prompt you to enter the code. To get this code, go to WhatsApp web and click “Link with phone number” option.

How to Get an ID & Phone Number From a Facebook Link. Facebook lets users create a unique ID or "username" that defines the Web addresses where Facebook profiles are located. Users can also enter ...

You can change your phone number on Uber by going into your app settings, though the process may vary slightly for your device.