I have just received a Samsung galaxy fold5 through the post, however I imagine it's full of bloatware and I'm inexperienced with this type of device.
What is the first things that you would do to secure it?
Thank you π
I think you confuse security and privacy. Samsung are pretty secure from what I saw. They are not private at all however. You can debloat it with adb and maybe tools such as Universal Android Debloater.
One thing I noticed is I never updated the app icon customization section. You don't need Asapticons/Icon mixer. Themepark has an option to add custom icons now!
I can also post my De-Bloater config (root only)/list of apps (that can be used to disable them via ADB) I've removed when I update the post in a bit.
I'm still on Fold3/OneUI 5.1 but apps should be similar.
I use FOSS applications as much as I can and try to avoid all samsung and google apps. In addition to that I'm always on pi-hole network to block background network requests by Samsung/Google
Use ADB to remove Google and Samsung bloatware and tracking. Ask around for help.
You should be able to use Heimdall to unlock the bootloader, but there isn't currently a build of LineageOS or DivestOS for this phone, so unfortunately you cannot yet flash a custom ROM (AFAIK). However, rooting should work if you need this (although it can hurt your security a bit).
I'd recommend removing Google Play Services and replacing it with microG, although this may be complicated.
The best solution, however, is probably to exchange the phone for a more versatile model, such as a Google Pixel or a Fairphone.
Uninstall or disable as much default apps as you can
Install Simple Mobile Tools or other opensource alternative from F-Droid
Install everything else you need
Use openaource apps from fdroid, or if you really have to then use Aurora store. For office use collabora office, for youtube newpipe, video vlc, etc. NEVER LOG IN TO GOOGLE/SAMSUNG ACCOUNT ON ANY APP except Aurora store. For any other recommendation/alternative just aak me.
@chaosppe speaking from my personal setup, I'd do all of these but personally my way to prevent as much data harvesting from Samsung phones I also installed Netguard and set only a handful of apps and exclude the rest (even system one) to stop all these Samsung apps from transmitting all types of data (Yes I know this may be somewhat extreme and I know the limitations of Netguard), but hey it's just my recommendation but maybe you can take this as a possible starting ground