Dillo supports number portability for Voice Out application. 

You can configure your Voice Out Senders on Dillo account by following these steps:

  1. Login on your Dillo console https://console.dillo.cloud/ 
  2. From the left side navigation bar, click Voice;
  3. Click Sender;
  4. Click on "+ Add a sender";
  5. Insert your Voice Out Sender with international prefix;
  6. Click on "Send Verification Code", you will recieve a Voice Call with your verification code;
  7. Insert Verification Code;
  8. Click on Save.

Noteif tou can't recieve Vocal Calls on that number or you aren't able to listen the Verification Code, you can Request Manual Verification.