Send SMS with trial twilio account

Question

I want to try to send SMS to a cellphone in Austria. I have set up a free trial Twilio account to do so. however, my Twilio account seems not to be capable of doing so. but I think it should be possible to send SMS with the trial account?

This is a screenshot of my Twilio number where you can see that it's not capable of messaging:

this is the exception i get when running my python-code which tries to send the SMS:

twilio.rest.exceptions.TwilioRestException: HTTP 400 error: 21606: The From phone number +43720881723 is not a valid, SMS-capable inbound phone number or short code for your account. 

any idea on how I can get this running? in other words: how can I activate SMS-capability for my free Twilio account? if this is possible, what are the limitations, i.e., how many free SMS messages can I send?

thanks!

Answer 1

To send SMS with trial twilio account TEST ACCOUNT SID and TEST AUTHTOKEN which is placed inside Phone Number > Tools > Test Credentials rather than ACCOUNT SID and AUTHTOKEN given by Console Dashboard > Account Summary.

Because ACCOUNT SID and AUTHTOKEN is bind after you buy the twilio number and TEST ACCOUNT SID and TEST AUTHTOKEN is bind with +15005550006.