If I remember correctly, the cellular chip is also closed source on the BraXPhone. This was one of the criticisms that I heard.

I also used rooting at the beginning (Android 4.0 to 7.0) but realized that it is a little bit of a security problem, so I later used cfw without rooting the device. But root was a lot of fun, like cpu scheduler tweaks, apk patches or system mods. TWRP simple backups and restores. System Application removal (daim Facebook App…… 2014 users will remember)

This was the only reason I liked Android over iOS: the CFW community. I’ve been running some sort of CFW since Android 4.0. Now, the charm has gone. GrapheneOS, SailfishOS, e/OS, LineageOS, iode OS, and even CyanogenMod – I’ve used them all. Each one has its own target group and use case. I hope it turns into the better one again. It’s like forcing a PC to only run the OS it’s delivered with.

I also asked some creators, but they can’t because of the Google partnership Programm, it prohibits reupload on other platforms

Oh and the i2c etc stuff, I connected ESP32 and other microcontrollers over USB.

I have an old pentium laptop N3520 with 4GB DDR3. I removed everything and put it in a receiver box 1U size. It consumes so little energy that it can run 5-7 hours from its battery (I call it build in USV). Last time I measured 3-7w. Also passiv cooled , no noise. Another machine I use , is with a i7 4770 with 16GB for Proxmox, 7-20w , peak is much higher but rarely used , only on boot and vm startup.

The GrapheneOS dev is looking into that. We can just wait and see. Or help if we have the skillset

https://bsky.app/profile/grapheneos.org/post/3lrekg74mjc22

Because Android AOSP gets cutting down by Google. They remove more features year by year and make them proprietary.

Is there even one Mobile OS with full functionality that is 100% FOSS? Functionality implies NFC and Banking DRM Content watching Third party app install Phone Calls The default functionalities.

True. The entire OS is not FOSS https://docs.sailfishos.org/Services/Development/Sailfish_OS_Source/

SailfishOS

SailfishOS can do that. They have a sandbox for android that you should not really notice as a end user.

SailfishOS (on Sony Xperia 10) and UbuntuTouch exist. Also the PinePhone but that is low low end.