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.
This is a very late response but I think most new users (especially people in the US) experience this problem when they first sign up for Twilio. I did recently, so I thought I'd share how to fix it.
Twilio requires that you whitelist specific countries in the Voice Geographic Permissions settings (there is also a counterpart for SMS).
It is a fairly straightforward process:
1. Login to twilio.com2. Click the ellipsis button (...) to expand the navigation menu on the left-hand side3. Select Programmable Voice in the Cloud Communications section4. Click Calls in the submenu5. Click Geo Permissions * If the layout changes, you can also just type in "Geographic Permissions" in the quick search in the top right-hard corner of the screen6. Select the countries that you want to set as "low risk" (i.e. enable calling/sending SMS messages for)7. Click the Save button