Build your Campaign same as you would any other Search Campaign. 

Except – Under Ads Set-Up click on the Call Only tab.

Create your Call Ads.
Click Preview to review.
If all looks good, Save your Campaign.
When ready to export over to AdWords Editor – click Build. 

Copy and paste your files into AdWords Editor. 

When copy and pasting your Call Only ads make sure that you paste them under Ads>Call Only Ads.

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