MetropleX And your RF research/evidence for this claim is provided where? (Not iPhones, Pixels)
Find My Device on Pixels work similar to Find My on iOS. It has specialized hardware that keeps communication via BLE even when the Pixel is off
The new Find My Device app uses a network of millions of Android devices to locate your phone, tablets, trackers, Pixel Buds, and more.
https://store.google.com/intl/en/ideas/articles/find-my-pixel-device/
avaluedcustomer So basically none of the phones whether it is running grapheneOS, iOS or an OEM android variant display any cellular activity in airplane mode.
Thank you for the PDF! Yet it remains a question what happens when the phone is turned off. It's a fact that both Pixel and iPhone emit Bluetooth for Find My functionality, the report says:
An Apple support page2 states that “Turning on Airplane
Mode turns off all radios except for Bluetooth”. We could not
find any corresponding clear statement for Android.
I'm confused. They didn't detect any 2.4Ghz signals even though Apple directly states they should have. From the report you can infer that airplane mode gives more isolation than turning the phone off, however the research gave 5 minutes for each test, it simply might've been too short timeframe.