Fairphone 4 install e/os

NasiGoreng · April 27, 2026, 2:02pm

Hi,

I have a fp3 with eos. I can get a fp4 but with android. How hard it is to switch fp4 to e/os?

Thx in advance!

Lidwien · April 27, 2026, 2:20pm

Have a read at the install page for Fairphone 4 at Murena e/os.

piero-e · April 27, 2026, 2:52pm

it is basically 3 copy/paste actions,

A safe guide to install /e/OS on your Fairphone

feel free to ask for some help.

NasiGoreng · April 27, 2026, 5:19pm

Thx in advance. Will get my fp4 in the next days.

oli.sax · April 28, 2026, 2:24pm

Be extra careful if you want to relock bootloader (it’s described in the guide), or keep it unlocked

NasiGoreng · April 28, 2026, 3:00pm

Yeah, I read all about it. I have no problem to leave bootloader unlocked. Does PayPal, banking and 2faktor auth app work?

If I need to lock it, is it possible? As far as I understand it should be no problem when using official image.

What method should I use, web install or via adb (Linux). Adb stuff is ready and worked

piero-e · April 28, 2026, 3:16pm

depends on bank.. [LIST] Banking Apps on /e/OS - Lists - /e/OS community

web install work in some cases, but often faill…
adb is only usefull for updating already installed /e/OS, for new install, you need to use fastboot.

you need to take care about the registred “android security update”.

NasiGoreng · April 30, 2026, 10:43am

Hi,

I got the phone now. It has a15 with sec update from 26 Jan 2026 on it.

Does that mean I can’t relock the bootloader?

It seams my needed apps can live with open bootloader…

piero-e · April 30, 2026, 2:16pm

yes.

NasiGoreng · April 30, 2026, 4:32pm

I’ve done the install. sec update old was from jan 2026, in e/os lates version it was from april 2026. locking the bootloader worked. I used the guide mentioned above! thx a lot!

now I have fun with moving my stuff to the new phone.

I didn’t know a good way to install my apps, so I wrote a quick an dirty shell script

#!/usr/bin/env bash

SRC=“”   # FP3
DST=“”        # FP4

adb -s “$SRC” shell pm list packages -3 | sed ‘s/package://’ | sort > fp3_apps.txt
adb -s “$DST” shell pm list packages -3 | sed ‘s/package://’ | sort > fp4_apps.txt

comm -23 fp3_apps.txt fp4_apps.txt > missing_apps.txt

COUNT=$(wc -l < missing_apps.txt)
echo “$COUNT Apps missing on FP4”

[ “$COUNT” -eq 0 ] && exit 0
fi

for pkg in $(cat  missing_apps.txt)
do
  echo “=> $pkg”
  dialog --yesno “install $pkg?” 10 30 || continue
  adb -s “$DST” shell am start -a android.intent.action.VIEW -d “market://details?id=$pkg”
  sleep 2
  dialog --msgbox “$pkg install done?” 10 70
done