I have updated the modem.zip file to the latest modem firmware of Fairphone OS 17.08.1. This zip file also includes the official Fairphone splash image. In case you have installed a custom splash image, you might want to reflash it.
Download: modem-17.08.1.zip
SHA256: 3f9ac2aa8968f7249780573f9f05ba4c488537c910e4ae2cd8ccd792d49e7f01
After you have flashed the zip file, you should see the version 4436.1-FP2-0-05 under Settings -> About Phone -> Baseband Version.
Since those are binary blobs, I have no idea what has changed since the previous release. But comparing the image files, I can see that the following files were changed:
NON-HLOS.bin
rpm.mbn
sbl1.mbn
tz.mbn
The following files were not changed since previous release:
splash.img
emmc_appsboot.mbn
sdi.mbn
Alternatively, you can flash the latest modem firmware using fastboot. You can get the firmware images from the official Fairphone OS downloads page (scroll down to binary images). Don’t flash system.img, boot.img and recovery.img obviously.