If your device has a built-in recorder (and are not using a Google dialer), you are able to use it to record your GSM/SIM calls.
To record your calls using the built-in call recorder, you will first need to enable it.
Open your phone dialer
Tap on the three lines or dots in the top right corner (on Samsung/Oppo/Realme) or in the bottom left corner (on Xiaomi).
Select "Settings."
Choose "Call Recording."
Enable "Record Calls Automatically."
Then you need to open up the Salestrail app on your phone:
tap on Recording Settings.
2. Enable call recordings
3. Select 'use built in call recorder'
4. You then will need to select the directory. If you are using a Samsung, please choose "Use default" as that is most likely the right one. If you are using any other brand, please choose "Select Directory".
5. Click on the button that says "Use this folder".
6. Allow Salestrail to access the files.
7. You are ready, when you see the folder path under Recording directory
8. Now you can go ahead and make a test call.
Note: If you wish to record your WhatsApp calls please check out this article: https://help.salestrail.io/en/articles/9991817-how-to-log-and-record-whatsapp-messenger-calls-and-whatsapp-business-calls-android-only
TIP: To ensure that calls are recorded without fail, both Salestrail app should be running in the background. Remove all battery restrictions and optimizations on your device to keep the app from being put to sleep.
Important:
Please keep in mind that it is your responsibility to adhere to your local laws and regulations pertaining to call recording. Additionally, in specific jurisdictions, obtaining explicit consent from all parties involved in the conversation may be a legal requirement.