Webex App | Make work calls using Call Back
Call Back lets you make a call using another number like a local land line or your      mobile, so you can avoid using the internet or racking up costs from making a long-distance      call. Your work number gets used as the caller ID so people can easily identify you. 
Before you begin
| 1 | From your mobile app, tap your profile picture, go to Settings, tap Calling, then tap Manage My Numbers and enable your call back number. | 
| 2 | Tap  | 
| 3 | Make your call from Webex App. | 
| 4 | When your call back number starts to ring, answer the call. Your phone then rings the person you're trying to reach. | 
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 in the top left corner and then select that same number from the list.
 in the top left corner and then select that same number from the list.