Fairphone 4 (fairphone-fp4)

Features
Flashing	Works
USB Networking	Works
Internal storage	Works
SD card	Works
Battery	Broken
Screen	Works
Touchscreen	Works
Multimedia
3D Acceleration	Works
Audio	Broken
Camera	Broken
Camera Flash	Works
Connectivity
WiFi	Works
Bluetooth	Works
GPS	Broken
NFC	Broken
Modem
Calls	Partial
SMS	Works
Mobile data	Broken
Miscellaneous
FDE	Works
USB OTG	Works
HDMI/DP	Broken
Sensors
Accelerometer	Works
Magnetometer	Works
Ambient Light	Works
Proximity	Works
Haptics	Works

Fairphone 4
	; Framebuffer console on mainline kernel
Manufacturer	Fairphone
Name	4
Codename	fairphone-fp4
Released	2021
Type	handset
Hardware
Chipset	Qualcomm Snapdragon 750G (SM7225)
CPU	Octa-core Kryo 570
GPU	Adreno 619
Display	1080x2340
Storage	128GB/256GB
Memory	6GB/8GB
Architecture	aarch64
Software
Original software	Android
Original version	11
postmarketOS
Category	community
Pre-built images	yes

Contributors

Z3ntu

Users owning this device

AnaxMorden (Notes: Using 8/256GB (Ubuntu Touch))
Apollo3zehn (Notes: /e/OS + Plasma Mobile)
Ayakael (Notes: Main phone, OryxOS))
BEEDELLROKEJULIANLOCKHART
Bitals (Notes: /E/OS)
Brittle
Cafehaine (Notes: Daily device)
Deathmist (Notes: Gray, 6/128 GB, UT 20.04 daily driver)
Electrodeyt (Notes: Gray, 6/128 GB, Ubuntu Touch daily driver)
GeraltvonNVIDIA (Notes: Ubuntu Touch 20.04 stable)
Grimler
Idi112 (Notes: Main phone, currently running Iodé (android))
Kasesag (Notes: Daily device.)
Peerke (Notes: Gnome mobile)
Pseudomind (Notes: pmOS phosh)
Uclydde
Z3ntu
⬡hexa

How to enter flash mode

For booting into fastboot, turn off the phone, hold volume down and plug in the USB cable.

Installation

Unlock the bootloader according to the official instructions.

UBports Installer

You can use UBports Installer v0.9.8 (or later) to flash a prebuilt image of postmarketOS onto your Fairphone 4. Just select postmarketOS in the OS selection and choose the desired UI and lean back!

postmarketOS web installer

You can use the postmarketOS web flasher to flash a prebuilt image of postmarketOS onto your Fairphone 4. Follow the instructions on the page.

Manually

You need to erase the dtbo partition for the current slot with fastboot erase dtbo, otherwise the device will not boot.

You can always restore the original dtbo partition by downloading and extracting the dtbo.img from the factory package and then flashing it via fastboot flash dtbo <path/to/dtbo.img>. This works similar for the boot partition.

The rest of the installation is standard, but because the device contains A/B slots, you must watch out for the correct slot being active.

The device does not contain a system as you might be used to, it contains one super partition which contains system/system_ext/product/vendor/odm partitions, in _a and _b variant each. This concept is called Dynamic Partitions.

You have a few possibilities to flash the postmarketOS rootfs:

userdata partition (> 100 GB space): pmbootstrap flasher flash_rootfs --partition userdata
super partition (6 GB space): pmbootstrap flasher flash_rootfs --partition super
Subpartition of super using fastbootd.
SD card: pmbootstrap install --sdcard /dev/$blk_dev

See also Dual Booting if you want to run postmarketOS in parallel with another operating system.

SD card notes

In case you want to flash to SD card on a different computer, do the following:

1. Edit $(pmbootstrap config aports)/device/community/device-fairphone-fp4/deviceinfo and change the value of deviceinfo_rootfs_image_sector_size to 512 (the SD card sector size)

2. Run pmbootstrap install --no-sparse (we do not need a sparse image for the SD card)

3. Copy the newly created $(pmbootstrap config work)/chroot_native/home/pmos/rootfs/fairphone-fp4.img to the other computer and flash it there with your preferred flashing tool.

Resources

Repairability and recyclers information on Fairphone 4 - Schematics and other information
Fairphone 4 - Kernel Source Code

Partition layout

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sda

Disk /dev/sda: 117.27 GiB, 125908811776 bytes, 30739456 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: CFAF47FD-955A-B7E5-3B44-7CB199157323

Device       Start      End  Sectors   Size Name
/dev/sda1        6       29       24    96K ALIGN_TO_128K_3
/dev/sda2       30       31        2     8K ssd
/dev/sda3       32     8223     8192    32M persist
/dev/sda4     8224     8479      256     1M misc
/dev/sda5     8480     8607      128   512K keystore
/dev/sda6     8608     8735      128   512K frp
/dev/sda7     8736    16383     7648  29.9M metadata
/dev/sda8    16384    67583    51200   200M oempersist
/dev/sda9    67584  2217164  2149581   8.2G rawdump
/dev/sda10 2217165  3790028  1572864     6G super
/dev/sda11 3790029 30739450 26949422 102.8G userdata

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sdb

Disk /dev/sdb: 8 MiB, 8388608 bytes, 2048 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: C294D7C7-0358-526E-7C3A-26D0921BB1F3

Device     Start   End Sectors  Size Name
/dev/sdb1      6   901     896  3.5M xbl_a
/dev/sdb2    902   933      32  128K xbl_config_a
/dev/sdb3    934  2042    1109  4.3M last_parti

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sdc

Disk /dev/sdc: 8 MiB, 8388608 bytes, 2048 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: 33EF572A-E407-059A-2A48-608D0AC95DF2

Device     Start   End Sectors  Size Name
/dev/sdc1      6   901     896  3.5M xbl_b
/dev/sdc2    902   933      32  128K xbl_config_b
/dev/sdc3    934  2042    1109  4.3M last_parti

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sdd

Disk /dev/sdd: 128 MiB, 134217728 bytes, 32768 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: 7E252AAA-82B5-5A26-C6B5-D7DD4C57C080

Device     Start   End Sectors   Size Name
/dev/sdd1      6    31      26   104K ALIGN_TO_128K_1
/dev/sdd2     32    63      32   128K cdt
/dev/sdd3     64   319     256     1M ddr
/dev/sdd4    320 32762   32443 126.7M last_parti

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sde

Disk /dev/sde: 1.64 GiB, 1744830464 bytes, 425984 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: E7841167-3D00-D421-8846-7B7A871AB8A1

Device      Start    End Sectors   Size Name
/dev/sde1       6     31      26   104K ALIGN_TO_128K_4
/dev/sde2      32    159     128   512K aop_a
/dev/sde3     160   1183    1024     4M tz_a
/dev/sde4    1184   1191       8    32K multiimgoem_a
/dev/sde5    1192   1319     128   512K hyp_a
/dev/sde6    1320  51239   49920   195M modem_a
/dev/sde7   51240  51751     512     2M bluetooth_a
/dev/sde8   51752  52775    1024     4M mdtpsecapp_a
/dev/sde9   52776  60967    8192    32M mdtp_a
/dev/sde10  60968  61223     256     1M abl_a
/dev/sde11  61224  77607   16384    64M dsp_a
/dev/sde12  77608  77735     128   512K keymaster_a
/dev/sde13  77736 102311   24576    96M boot_a
/dev/sde14 102312 102343      32   128K devcfg_a
/dev/sde15 102344 102363      20    80K qupfw_a
/dev/sde16 102364 126939   24576    96M recovery_a
/dev/sde17 126940 126955      16    64K vbmeta_system_a
/dev/sde18 126956 126971      16    64K vbmeta_a
/dev/sde19 126972 133115    6144    24M dtbo_a
/dev/sde20 133116 133627     512     2M imagefv_a
/dev/sde21 133628 134139     512     2M uefisecapp_a
/dev/sde22 134140 177659   43520   170M core_nhlos_a
/dev/sde23 177660 177691      32   128K featenabler_a
/dev/sde24 177692 178331     640   2.5M fsgbk_a
/dev/sde25 178332 182427    4096    16M questdatafv
/dev/sde26 182428 182555     128   512K aop_b
/dev/sde27 182556 183579    1024     4M tz_b
/dev/sde28 183580 183587       8    32K multiimgoem_b
/dev/sde29 183588 183715     128   512K hyp_b
/dev/sde30 183716 233635   49920   195M modem_b
/dev/sde31 233636 234147     512     2M bluetooth_b
/dev/sde32 234148 235171    1024     4M mdtpsecapp_b
/dev/sde33 235172 243363    8192    32M mdtp_b
/dev/sde34 243364 243619     256     1M abl_b
/dev/sde35 243620 260003   16384    64M dsp_b
/dev/sde36 260004 260131     128   512K keymaster_b
/dev/sde37 260132 284707   24576    96M boot_b
/dev/sde38 284708 284739      32   128K devcfg_b
/dev/sde39 284740 284759      20    80K qupfw_b
/dev/sde40 284760 309335   24576    96M recovery_b
/dev/sde41 309336 309351      16    64K vbmeta_system_b
/dev/sde42 309352 309367      16    64K vbmeta_b
/dev/sde43 309368 315511    6144    24M dtbo_b
/dev/sde44 315512 315543      32   128K featenabler_b
/dev/sde45 315544 316055     512     2M imagefv_b
/dev/sde46 316056 316567     512     2M uefisecapp_b
/dev/sde47 316568 360087   43520   170M core_nhlos_b
/dev/sde48 360088 360727     640   2.5M fsgbk_b
/dev/sde49 360728 360728       1     4K devinfo
/dev/sde50 360729 360984     256     1M dip
/dev/sde51 360985 361048      64   256K apdp
/dev/sde52 361049 363096    2048     8M spunvm
/dev/sde53 363097 371452    8356  32.7M splash
/dev/sde54 371453 371453       1     4K limits
/dev/sde55 371454 371454       1     4K limits-cdsp
/dev/sde56 371455 371710     256     1M toolsfv
/dev/sde57 371711 373758    2048     8M logfs
/dev/sde58 373759 374270     512     2M cateloader
/dev/sde59 374271 390654   16384    64M logdump
/dev/sde60 390655 390686      32   128K storsec
/dev/sde61 390687 390814     128   512K uefivarstore
/dev/sde62 390815 390821       7    28K secdata
/dev/sde63 390822 390949     128   512K catefv
/dev/sde64 390950 391205     256     1M catecontentfv
/dev/sde65 391206 392229    1024     4M oembin
/dev/sde66 392230 392261      32   128K swversion
/dev/sde67 392262 425978   33717 131.7M last_parti

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sdf

Disk /dev/sdf: 128 MiB, 134217728 bytes, 32768 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes
Disklabel type: gpt
Disk identifier: 807C60B8-2098-B26C-7DC6-B11C3B173565

Device     Start   End Sectors  Size Name
/dev/sdf1      6    31      26  104K ALIGN_TO_128K_2
/dev/sdf2     32   287     256    1M traceability
/dev/sdf3    288   319      32  128K fpconfig_persist
/dev/sdf4    320   351      32  128K fpconfig
/dev/sdf5    352   991     640  2.5M fsg
/dev/sdf6    992  1023      32  128K fsc
/dev/sdf7   1024  2559    1536    6M tunning
/dev/sdf8   2560  4095    1536    6M modemst1
/dev/sdf9   4096  5631    1536    6M modemst2
/dev/sdf10  5632 32762   27131  106M last_parti

fairphone-fp4:~# fdisk -l -o Device,Start,End,Sectors,Size,Name /dev/sdg

Disk /dev/sdg: 12 MiB, 12582912 bytes, 3072 sectors
Disk model: KM2V8001CM-B707 
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 524288 bytes