Call recording is possible in the default phone app (it appears as a button in the in-call UI), depending on the user country. Full details are available here: java/com/android/dialer/callrecord/res/xml/call_record_states.xml · v7.1 · os / public / lineage / packages_apps_Dialer · GitLab
This was implemented in older aosp versions, then removed, and re-added in lineage, without changing these rules. We are actually discussing internally in iodé to enable this feature to everyone. I personally believe that users shall not ignore laws of their country, and they are solely responsible for how they use their phone.
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