TAS-106 - Operation is not allowed

Unfortunately, with the device id limitation, this API can be used mainly to answer incoming calls to a desk/hard phone only.

But if you want to try out with the RC app. here is a workaround solution.

Manually make an outbound call from your RC app to any phone number and answer the call. Then read the user active calls with the view=Detailed and parse the "from" object from the response to detect the device id. The device id will remain the same until you change your internet connection.

E.g. response

{
  uri: 'https://platform.ringcentral.com/restapi/v1.0/account/80964XXX/extension/6228832XXX/call-log/YILblmt5jMJPzUA?view=Detailed',
  id: 'YILblmt5jMJPzUA',
  sessionId: '1166748370016',
  startTime: '2023-11-02T14:03:54.000Z',
  duration: 104,
  durationMs: 104000,
  type: 'Voice',
  internalType: 'LongDistance',
  direction: 'Outbound',
  action: 'VoIP Call',
  result: 'Call connected',
  to: {
      ...
  },
  from: {
    name: 'Paco Vu',
    extensionNumber: '11119',
    device: {
      uri: 'https://platform.ringcentral.com/restapi/v1.0/account/80964xxx/device/802404970016',
      id: '802404970016'
    }
  },
...