Both sides of every call. No root.

Yes, where the phone’s audio hardware hands both sides over — which it did on every phone above. The Self-test tells you for yours in about a second. In a messenger call each side has a channel of its own, you on the left and the other person on the right; a phone call has them so where the phone keeps the two apart, as the Honor does, and on others — a Pixel, by one report — both channels carry the same mix. On speakerphone, a messenger call’s other person is heard on your side too: your side is the plain microphone, without the call app’s echo cancellation. A call that still comes out with one side — over Wi-Fi Calling, say — is worth an issue on GitHub: tap Copy a report in Diagnostics right after it and paste that in.

Yes, calls and meetings, both sides, on Android 14 or newer — once you switch Google Meet on under Messenger calls. Like the messengers, it is off until you do. Meet puts its calls through Android’s own call service, and up to 0.21 JemRec took them for phone calls and recorded every one, meetings included. Now a call is a phone call only when Android says the phone itself is in one.

On the two phones it has been tried on, yes. No app can play sound into a call, so the recorder does it as the shell: on the Honor through an output Android calls in-call music, on a Galaxy S23 over Wi-Fi Calling through Android's call-screening route; not every phone has either. Before you switch the answering machine on, its Checks tell you in a second whether yours does, and a Test call settles it for that kind of call: 2G, VoLTE and Wi-Fi Calling differ. Your microphone is muted while the greeting plays and the message is left, so the caller hears your greeting and nothing of your room.

Only to start the recorder: that is the one step that needs Wireless debugging, which Android runs over Wi-Fi. Once started, the recorder carries on with Wi-Fi off, on mobile data, anywhere. A reboot stops it, and the next few seconds of Wi-Fi bring it back by themselves (see Get started, step 3). Unplugging the phone from a computer can stop it too (a charger does not); on Wi-Fi it is back within seconds, by itself. With the screen off, step 3 matters here as well: without it, an Honor’s battery manager kept the recorder down for about four minutes in two tests of three, and 8.5 minutes in another. Until then nothing is recorded — the header says so, a notification says the phone held JemRec back the moment it lets JemRec run again, and one says the recorder is down if it stays down two minutes. And if When JemRec is off is set to Turn all debugging off, turning JemRec back on needs Wi-Fi too. Settings → Start without Wi-Fi takes the Wi-Fi away from all of that until the phone restarts: it opens debugging port 5555, which the recorder can be started over with no network at all. After a restart, the first start needs Wi-Fi once, as before. The cost is the open port, on every network the phone joins whenever USB debugging is on — unless Turn all debugging off goes with JemRec.

Play removed call recorders in 2022 by forbidding the Accessibility API for recording, and no policy change since has re-opened the door. That is a distribution decision, not a technical one — the app itself never needed Play, and F-Droid asks only that a build be free software and reproducible from its source, which this one is. It never will be on Play.

It depends on where you and the other person are: some places need one party’s consent, some everyone’s, some a spoken notice. That is your responsibility; JemRec records what you tell it to and warns nobody on your behalf.

In the phone’s standard Recordings/JemRec folder (or the folder you chose), as Opus files any music app can play; Share can also convert one to .m4a for iPhones and Macs. They are yours rather than the app’s, so they stay when JemRec is uninstalled — delete them first if you want them gone. Deleted ones wait in Recently deleted for 30 days. Installed again, JemRec shows them as they were, once you let it read them (it asks): each recording carries its own marks — a message, kept, who a messenger call was with — inside the file.

Your phone refuses JemRec the one setting setup grants it until a switch of the phone’s own is set, and the card names it. On an OPPO, OnePlus or realme phone it is Disable system optimization, the last switch in Developer options’ Apps section (Disable permission monitoring on older ones; where it says just Permission monitoring, turn that off instead); some show it only in English, so if it is not there, set the phone’s language to English, turn it on and set the language back. On a Xiaomi it is USB debugging (Security settings). Then tap Try again. Setup does not finish without that setting: it is what lets JemRec turn Wireless debugging back on after a restart. Leave it that way afterwards: the recorder needs it too, to turn debugging off when JemRec is uninstalled. Reported from two OnePlus phones (issues #61 and #64); we have none to try it on.

Choose in Settings → When JemRec is off what goes off with JemRec, then turn JemRec off — with the record button or the Quick Settings tile — before you open the bank. Hide Developer options switches Developer options and Wireless debugging off; USB debugging stays on, so JemRec keeps its recorder and turns back on instantly, anywhere. Turn all debugging off switches USB debugging off too, and the recorder with it: turning JemRec back on then needs Wi-Fi and takes about 15 seconds, the answering machine is off until then, and away from Wi-Fi JemRec asks first — unless Start without Wi-Fi is on (Settings → Debugging): then it comes back anywhere, on mobile data or none, until the phone restarts. Try the first; if your bank still refuses, the second. With Start without Wi-Fi on, the first leaves debugging port 5555 open while JemRec is off, which a bank may look for too; the second closes it. Turning JemRec back on puts back what it switched off. Our own banks open with debugging on, so we could not test one that refuses — if yours needed the second choice, or neither worked, say so in issue #37.

Uninstall JemRec first. If the recorder is running, it notices the uninstall within a few minutes, turns both debugging switches off and exits — on an OPPO, OnePlus or realme phone only while its Disable system optimization switch is set as setup asked, or they stay on for you to turn off. Either way, once JemRec is gone nothing turns them back on. To have it off only while JemRec is off, see the question above.