fp6-img/README.md

# fp6-img

Flashable [postmarketOS](https://postmarketos.org/) images for the
**Fairphone 6/6+**, built nightly from the
[Catcrafts milos-linux](https://forgejo.catcrafts.net/Catcrafts/milos-linux)
`combined-stable` kernel branch, with
[imsd](https://forgejo.catcrafts.net/Catcrafts/imsd) (userspace VoLTE)
preinstalled.

Maintained by [Jorijn van der Graaf](https://catcrafts.net/about)
(TheMightyCat) at [Catcrafts](https://catcrafts.net/).

## What works

Everything on the `combined-stable` branch: display, touch, wifi, cellular
data, NFC (reader), speaker audio, microphone, IMU, magnetometer, barometer,
ambient light/proximity plus VoLTE calls (both directions) through imsd.

## Flashing

Download `fp6-img.tar.xz` from the latest release and unlock the bootloader
([Fairphone's official process](https://support.fairphone.com/hc/en-us/articles/10492476238737)).

**Install**: with the phone in fastboot mode,

```sh
tar xf fp6-img.tar.xz
cd fp6-img
./install.sh
```

`install.sh` erases dtbo, flashes the rootfs, **RAM-boots** the kernel, writes the boot partition from
inside Linux where the bootloader's NV-wipe cannot see it, then reads the modem
NV back and reports the result. The bootloader never writes `boot`.

Default login: `user` / `147147` (same as official postmarketOS images —
change it). **Never re-lock the bootloader** with a custom image installed.

## VoLTE configuration

imsd is installed but needs your carrier's P-CSCF address:

```sh
# /etc/imsd.env
PCSCF=<your carrier's P-CSCF IPv6 address>
```

Find it in a stock-firmware capture or your carrier's IMS documentation, then
`systemctl restart imsd` (the service is enabled at boot and waits for this
file to exist). See the
[imsd README](https://forgejo.catcrafts.net/Catcrafts/imsd) for the full
variable reference and carrier assumptions.