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Interesting thread in the #SailfishOS forum where a user set up the following experiment:
They flashed an Xperia X phone with different OSes, left them idle without running any apps and then saw how often and where the OS is connecting to by default (tcpdumps).
Results:
- #Android 8.1 from vendor – an expected catastrophe: within one minute, it „connected everywhere“.
Read on for #UbuntuTouch, #SailfishOS, and #grapheneos
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https://forum.sailfishos.org/t/privacy-and-security-of-sailfishos/6028/42
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Further results:
- #UbuntuTouch – connections every several minutes to a few Canonical and ubports servers – probably tuneable, but behaving like this out of the box.
- #SailfishOS X – connects to some NTP servers, to ip4.jolla.com (detection of WIFI capture portals) and some AWS server, exchanges a few bytes and stops; repeats the same process after ~12 hours (probably network clock synchronization).
This is even less than #GrapheneOS‘ default connections.