To update your Fairphone 4 (FP4), always use the regular procedure.
If you encounter an issue, you can follow this article to perform a manual update installation of Fairphone OS on FP4 using a computer.
This article will also help you to revert to Fairphone OS if you installed a different Operative System (OS)

Preliminary steps

1. Before you start with any procedure, make a backup of your data. If you do not, you might lose your files like photos, music, contacts, etc.
   
2. Unlock the bootloader of your FP4. Those instructions cover Fairphone OS. If you have installed a different OS on your Fairphone, the instructions might be slightly different. In this case, you will have to look for the instructions yourself.
3. Remove SIM cards and SD cards before you proceed. When you have completed the procedure, you can insert them again.
4. Download onto your computer
   
   

   -Fairphone OS for FP4 (Android 11)-
   

   filename: FP4-FP3W-factory.zip
   version: FP3W.A.128.20220516
   md5sum: 78e868dbb781b85643f3f0c083af7c53
   sha256sum: 5b1d2857153b7d8d76c15d584b8851f6ce7d00491aa2a510d8916c929156f6c5
   Not sure what these are for? Click here to learn more.

- IMPORTANT -

• If your current Fairphone OS version is higher than the one provided, you might lose all data. To boot your device, you may be forced to do a factory reset. Make sure you back up your data.
• Instructions apply to the Chrome Browser
  You can use any browser, but some steps may be different

Requirements:

• Access to a computer
• USB-C certified data cable
• Your Fairphone 4

Instructions

1. Complete the preliminary steps above!
2. Charge your Fairphone above 80%
3. Power off your FP4 and once it's off, connect the USB-C cable.
4. Boot your device into Fastboot mode.
   Press and hold the volume down button (up to five seconds)
   The device will display the following screen:
   
5. Check that the red line at the bottom states the message:
   DEVICE STATE - Unlocked

Depending on which computer you are using, you will have to follow a different procedure. To proceed, select below which computer you are using.

• Windows 10 (recommended)
• macOS X 10.1x +
• LinuxUbuntu-based 18.x +