Buy European

A police department can't break into anything. They either use 3rd-party tools made by companies like Cellebrite or MSAB, or they send a device to e.g. the FBI (who might sometimes have custom tools, but most of the time they also just use some tool made by some forensics company like Cellebrite). The only reason why forensics companies don't offer SailfishOS exploits, is because it's way too obscure, and developing an exploit wouldn't be profitable by any means. That doesn't mean that SailfishOS is exploit-proof though. Defending against brute-force attacks requires a hardware secure element, like the Titan M2 or Apple Secure Enclave. Jolla phones simply don't have secure elements.

GrapheneOS is the only OS that's "Cellebrite-proof", as can be seen in leaked internal docs from Cellebrite.

SailfishOS is also paid and mostly proprietary. There's no reason to trust it more than proprietary Android or iOS. In fact, I'd prefer a modern iPhone (12 or later) with the Apple Secure Enclave over a equally proprietary, but less secure device that lacks a secure element. The UX is also a million times better. And yes, I have tried SailfishOS in the past, back when it only ran on Sony Xperia phones. It even was my daily driver for a couple of months.

Buy second-hand then. You get a cheaper phone and you don't give google a single cent. Win-Win.

The majority of people don't need so much security, for example I don't use SELinux even on desktop.

Privacy goes hand in hand with security. If you don't have strong security then you can't say that you have privacy. Governments and hackers will exploit your oversight to breach your device, rendering your distancing from Big Tech pointless.

I'm sorry but I won't give Google more money, I think they have enough billions of dollars already.

I understand and I feel the same way. It's ironic that in order to obtain the highest level of security and privacy you have to first degoogle and then go back to Google, but life is funny that way. If you are adamant about it, then I suggest you buy a refurbished Pixel.

I prefer to support business projects and developers who are for open source and the independence from the Big Tech

And I encourage you to do so! More than 90% of my apps on my mobile devices now come from either European devs or FOSS projects. Similar situation on my laptop as well that now runs Linux instead of ChromeOS.

However, I strongly urge you not to compromise your online security and privacy. Choosing a weak Android ROM as your OS is one way you can do that and it can have more negative effects on your life than just staying with your default Android. If you really feel the need to ditch Android immediately, then go for Calyx if you can, but try to switch to Graphene when you can. I also can't immediately switch, but I will probably choose Graphene when I'll be able to.

Harmony is closed source which is a massive red flag as even Android is open source. Definetly not a good alternative.

Fairphones aren't European-made. Manufactured by Arima in Suzhou, China.

EDIT: I wonder if the people downvoting my comment did so after the parent was edited to remove the statement that Fairphones are "European-made". Or if they just don't like the fact I mentioned, which can be confirmed on Fairphone's own website:

• https://www.fairphone.com/en/2019/12/30/meet-the-makers-the-people-behind-your-fairphone/