Improved
Send a test message from the last step of a new campaign
The review step of a new campaign has a Test send button, so you can check the message on a real phone without saving a draft first.
To see a campaign message on a real phone, you had to save the campaign as a draft, open the draft, send the test, and come back to send.
The review step of a new campaign now has a Test send button next to Send now. It sends the message, with your variables filled in, to the number you enter. No draft is created.
The campaigns guide describes both places you can test from.