I am daily driving my PinePhone Pro running manjaro (Plasma Mobile) for about a year now. I can say, it is definitely daily driveable with some exeptions/limitations:

• The Battery life is horrible, like 3 h max usage from a battery. But since the batteries are cheap and can easily be swapped, I just have 4 of them to get through the day
• The camera is working in the sense, that it can make pictures. If you want nice pictures, bring a separate camera
• From time to time, cellular network connectivity drops out for short moments

Other than that it is pretty much functioning as a real phone. Of curse there are not that many apps. Telegram works natively and flawless, but whatsapp needs to be used via Whatsapp Web. For syncing all my documents and files I use nextcloud which works without any problems (once set up)

There is also the non Pro Version of the PinePhone, which is much slower, but has a better camera software and longer battery life (and is cheaper)

Because phone manufacturers don't open source their firmware, you probably won't be able to get Linux on an off-the-shelf phone. (Please someone correct me if I'm wrong).

Your best bet, if you want to go down thus route, is to get the PinePhone Pro. ~~It's relatively affordable.~~

Before you try anything, think hard about your relationship with your phone and what you expect from it. Does work require you have an app installed? What kind of apps do you use regularly? You won't have things like: CVS for meds, AA for flying, Steam for 2fa, Signal, Telegram, google maps, etc. Some you might be able to use their webapps, but the browser might be a bit sluggish because it's the full desktop version. Firefox isnt fully mobile friendly. Battery life won't be what you're used to. Linux on the phone is just like your regular Linux, so you'll have the stuff your used to from there, and you'll having calling, sms, mms, and voicemail.

I have the PinePhone and the Librem 5, but I still use my android.

You have to find a phone that is compatible with open source Linux Phone OS. Most of the OS websites give a listing of what phone make/model works. FYI, almost all the Google Pixel phones work.

Here are a few I am keeping an eye on when my Pixel 4a/5G stops getting updates from Google...this year. /

LineageOS/ GrapheneOS/ CalyxOS/ e.foundation/

Youtube videos and other websites are good sources on how to install, etc.

GNU/Linux on Phones are far from Android, but we slowly getting there. So if you want a better experience, just buy a phone that can run a community Android distribution like LineageOS.

But if you are an advanced user and really want to use GNU/Linux on your phone, then I would recommend buying a PinePhone Pro + Pine keyboard (there is a bundle on their website). The keyboard is needed because it extends the battery life (without it the battery life is horrible) and compensates good swipe touch keyboard typing (we currently don't have a touch keyboard with swipe feature). I daily drive this phone on ArchLinux with Plasma Mobile and I satisfied with the result.

The Pixel line of phones does allow the user to unlock its bootloader (unless it is carrier locked) and is supported by options such as GrapheneOS and CalyxOS.

I'm running GrapheneOS on my Pixel 6a, and I'm very happy with it. I'll continue to use it until a viable Linux alternative presents itself.

pinephone. but i just use it for fiddling around as too much stuff does not work.

I'm currently using a PinePhone Pro as my daily driver and if you want something to play around with that's definitely an option (though the PinePhone is probably a little more stable and less tinkery).

If you care less about it being a "free" phone built specifically for Linux and just want something that works, then rooting some older phone with good support will probably provide a better experience.

Why would you want a Linux phone. Linux, especially on phones is insecure! Go with an Android phone

Phones that run mainline Linux are seldom. The only ones that come to my mind are PinePhone Pro (outdated hardware, 400 bucks) and Librem 5 (also outdated hardware, incredibly expensive 1300$ !). If you are serious get the PinePhone Pro. But expect pitfalls because you can't just run Android apps.

Nextcloud is still the best option for self hosted cloud services.

I'm waiting for my preordered shiftphone 8 to be released. They promised to cooperate with custom rom devs and improve the experience compared to their current model the Shift6mq which already can run postmarketos.

Also Nextcloud is a fantastic alternative to google/microsoft/apple cloud.

Android runs on a unix kernel.

I personally think an open source android rom is a good middle ground between running a full linux OS and google's Android.

I don't know what roms are good right now though.

I would probably go for a fairphone and install the non google rom: https://support.fairphone.com/hc/en-us/articles/9979154556817-Google-free-Android

Or check if your current phone is supported by any open source Rom.

In any case you will most likely have a lot less apps since you would have only access to non google play services apps. There is a fairly decent choice of apps on F-Droid but your experience will remain limited.