Please Note: opting in above three options, if still the call recording is not working then it’s not the Application failure however, it’s the Android (childphone) limitation which is clearly mentioned on the Google Support page that APIs which enable call recording are being slowly deprecated and removed since several Android versions, to ensure user privacy and security, and also because call recording laws are so varied across regions that it becomes difficult to map all of it out. For more information please visit the Google android support page.