If your device has a built-in call recorder, which is usually the case on devices in India, Indonesia and Russia, you might be able to use the device's built in recorder as a recording source and Salestrail will just pick up the recording and store ot on the Salestrail app and in the dashboard.
To determine whether you can use your built-in recorder as a recording source, you first need to determine whether your phone uses it's native dialer or a Google dialer. If your phone has a native dialer, you will be able to use the inbuilt recorder as the source for Salestrail, but if your device has a Google dialer, you will not. This is due to the fact that the call recording storage isn't accessible on phones with Google dialers.
To determine whether your device has a Google dialer, please follow the steps in this article: http://help.salestrail.io/en/articles/10002225-how-do-i-know-if-my-phone-has-a-google-dialer
Phones using a native dialer
If your phone has it's own native dialer (not a Google dialer) please follow the steps in this article to set up call recording on your device: https://help.salestrail.io/en/articles/10002260-call-recording-via-the-built-in-recorder
or watch this video. https://calls.salestrail.io/BuiltInRecorderVideo
Phones using the Google dialer
If your phone has a Google dialer, please follow the steps in this article to set up call recording on your device: https://help.salestrail.io/en/articles/9258756-how-to-record-your-calls-using-the-salestrail-recorder-apk
If you are unsure of whether you have a built-in recorder on your device, please check this article: https://help.salestrail.io/en/articles/10002181-setting-up-call-recording-on-a-device-that-has-a-built-in-call-recorder