Twilio does not work!! Please Help!

Twilio does not work!! Please Help!

  

I'm trying to work with Twilio in a Mobile application, I've already made the Twilio Connector configuration, but I do not know how to make it work. I have the number that Twilio provides, but when I try to call a cell phone number, it throws an error. There is something else that I have to configure and I did the step by step. By the way, I'm trying to call a Colombian cell phone number and I already have a Colombian number on Twilio.

I do not need a International permission because the number that I have is from Colombia.


not sure but try to get rid of the international number +571  or +57.