How to import devices of an existing Talk2M Free+ account into a Pro account?

ANSWER 

When dealing with several Talk2M Free+ accounts, you might want to import all the devices into a single Talk2M Pro account.

• Open the Account tab inside the Talk2M Pro account
• Click on Show advanced settings.
  There you’ll find a section called Import All Ewons from another account.
• Click the Import all Ewons Wizard button.