When you think of mobile Linux, most people would think of Android, followed by something like a PinePhone or Librem5. But, there is
another mobile Linux distro that is often neglected. KaiOS is a fork of the old Firefox OS, and it is one of the only non-Android Linux distros
that actually has commercial steam. I myself have recently switched to a KaiOS flip phone, and I am going give my honest review of this
unusual operating system.
Here is the guide I used. It does require you to get temporary root and work with the command line a little bit, but it is not super hard.
https://martinkaptein.com/blog/kai-os-remove-default-pre-installed-bloatware-apps/