Hi Erika, Thanks for your help. I did manage to answer a call for Zendesk Talk using my mobile phone - it was when I was in the UK and both numbers Zendesk Talk and my mobile phone are British. Now...
I configured my phone with Zendesk Talk but it still doesn't work. When someone calls and I pick up the phone the message is 'this is a call from Zendesk Talk' and then it turns off. How to solve it?