Since Android 7 Fairphone OS just has the same recovery program as Fairphone Open OS.
It is called Team Win Recovery Project or, more commonly, TWRP.
Tapping the middle “home” icon at the bottom always brings you back to the main menu.
Tapping the list-like icon to the right displays the console. Can you see any error messages there (or post a photo)?
I don’t have any SD card 
I got this : "Unable to find the partition for path ‘/system’ "
I got this after installing the update and clicking on the reboot button. I dont know how to proceed from there. Anyone with some advice?
Thanks!
The problem seems to be the failed Zip signature verification.
Since I use LineageOS and more current TWRP versions from twrp.me, I can’t pinpoint what specifically is going on here.
“Zip signature verification failed!” is known to happen if you try to install something other than one of Fairphone’s OSes with their TWRP 3.1.1-0.
Solution would be to install a more current community TWRP … Fairphone 2 … but you are not trying to install something other than one of Fairphone’s OSes.
“Zip signature verification failed!” is more trivially caused by “Zip signature verification” being enabled in TWRP’s Settings (you can get there from the main menu).
But I just booted Fairphone’s TWRP 3.1.1-0, and this setting doesn’t seem to be enabled by default.
In my understanding TWRP can only verify Zip signatures of signed Zips it has the proper signature key to.
As I would suppose Fairphone’s update Zips would be properly signed, and as I would suppose Fairphone’s own TWRP would have Fairphone’s signature keys … I don’t know what exactly fails here.
If it was me, I would boot a signed, more current TWRP image without flashing it to the phone … see twrpwoflashing … and try to install the update file with that … “Install” in TWRP’s main menu, then navigate to /cache by tapping “(Up A Level)” and “cache”, and hope fp_update_gms_whatever.zip is still there to select.
But then again I’m a tinker kid with a backup of my data, and perhaps contactsupport is a better idea, they certainly know their own stuff better than me 
.
@Pons, maybe a bit more practical help. I think it is just a failed/corrupted download. If rebooting does not bring you back to a working phone (allowing you to download again), try a manual install of the OS: https://support.fairphone.com/hc/en-us/articles/207914363-Manually-install-Fairphone-OS-for-the-Fairphone-2
Very good. I just now read “The user data will not be erased.”
I thought manual installs would wipe the phone. Learned something again .
Thanks a lot, I will take a look at the presented possibilities!
It happened the same to me. I’ve followed this steps to get back to 19.02.1, I hope it helps you: https://support.fairphone.com/hc/en-us/articles/207914363
Where can the binary of version 19.05.3 for the manual install be found?
They only have the 19.02.1 version in the manual install page
That’s why I asked 
The FP-Open Files are already available, but with a different version number (19.05.2 instead of 19.05.3), cf…
https://code.fairphone.com/projects/fp-osos/user/fairphone-open-source-os-downloads.html
Another case of being stuck in recovery here. Error E1004. Trying the revert back to 19.02.1 now.
Revert to 19.02.1 worked. Will postpone the update until it’s safe to do.
For the Fairphone Open files they needed only 2 steps, whilst needing 3 steps for the ‘normal’ version.
Ahaaa, interesting… you learn something new every day
Any idea on that?
My phone froze in the “powered by Android” screen after rebooting the 19.5.3 update. I had to follow these steps: https://support.fairphone.com/hc/en-us/articles/207914363. It allowed me to restore the 19.2.1 OS version, the apps and Google data. You can download the 19.2.1 version from here: https://code.fairphone.com/projects/fp-osos/user/fairphone-open-source-os-downloads.html
It seems to be working fine, but I still haven’t updated it again to the latest version.
Honestly, I love the phone, but it has troubles almost with every update.
That’s part of the fun having a sustainable phone: you learn to understand the tech a bit better with every update
