It works in Telegram and Viber.
When creating the button, you need to select "Request the phone number."

When the button is clicked, a window will open asking to confirm the number transfer:

If the client approves the phone number request, their number is sent to the bot as a standard message.
The phone number will be automatically saved in the variable
phone.
How to create "Call" button
Currently, it works only on Facebook.
- When creating the button, choose the "Call (Facebook only)" function from the list.
- Fill in all the required fields that appear.
