Hi, I'm trying to develop an app to download all voip calls content to my laptop.
Unfortunately, to access my production data I have to prove that app works fine on sandbox, but in sandbox it is tricky to make voip calls and recordings.
I can't make a call in my sandbox account, I tried to call myself or call some free numbers in USA, but anytime there is the reason for errors:
1) The number you dialed has either been disconnected or is not a valid phone number. Please check the number and try again.
2) There was not enough Calling Credit on your account to complete this call
Could you please advice how to generate one voip call recording with some real sound for at least 2-5 seconds? (just for testing) Is there any way to publish the app to production without "testing in sandbox" if I can't generate the required data in sandbox?
