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Call denied - how to call Phones with Sinch?

I am new to Sinch and just trying out the PSTN example.

However, I can only place a call to the Mobile Number I used to register and nothing else.

Error:

Calling (OTHER NUMBER)
Answered at: Tue Dec 04 2018 09:22:46 GMT+0800 (Singapore Standard Time)
Ended: Tue Dec 04 2018 09:22:52 GMT+0800 (Singapore Standard Time)
Duration (s): 5.574
End cause: DENIED

Whereas this page tells that the new account can call any number:

enter image description here

Solution

  • The solution is to top-up account balance using Paypal or Credit Card and calls will be allowed. Apparently, the free $2 USD doesn't work.