I’m not that familiar with the “telco” part of communication services like Twilio. But since it’s the best in the business (I checked out the Gartner chart), I started doing some experiments with the SDK and the console. I was wondering about the total cost of ownership of a solution based on Twilio services and I need to understand some details.

My use case:

Mobile app (Twilio Voice SDK with a virtual phone number) –> mobile p Stn number

Mobile PSTN number –> Mobile app (Twilio Voice SDK virtual phone number)

From what I’ve read online and in the docs, this should be the cost:

Country: Italy

Inbound call: PSTN leg (free since it’s not on the pricing page) + VoIP leg ($ 0.004/min)

Outbound call: PSTN leg ($ 0.0445/min) + VoIP leg ($ 0.004/min)

Do I need to set up SIP routing and then apply the SIP cost?

There might be other costs involved, but for now I’m just interested in the communication side of things. This is a POC, but I’m expecting the volume to increase later on.

Any help you can give would be greatly appreciated.