Changed my mind. I decided to install Sailfish on the Sony Xperia 10 III.
It was plain sailing. 
I guess, things only become difficult when things go wrong, and things went very smoothly.
In brief, I unlocked the bootloader, and downloaded Android 12 from Sony. I flashed that to the Xperia (11 wasn't available). I performed all the usual 'phone stuff, which worked. I then flashed the 'phone with Sailfish using fastboot.
The same things are still working.
@OpenComputeDesign @s31bz @light @admitsWrongIfProven
good feedback! i think #furiphone has support for #android apps (#waydroid iirc?) and back in the day so did #jolla / #sailfish - i think you can get those on a #sony these days
also i've run android-x86 in vm and its alright but idk what those apps are gonna try. supposedly only finance apps are allowed by google to check for a rooted phone but ... who knows https://peabee.substack.com/p/everyone-knows-what-apps-you-use
Er der nogen her som har erfaring med
hvilken #Linuxphone kan håndtere vores elskede
#MitID #MobilePay apps .. ?
Det er tid at gå (tilbage) til #linux på #mobil - men de to apps er ligesom #cantDoWithout ...
tak!
Time to #free the #mobilephone too.
Therefore, collecting possible alternatives here,
for me and others -
and grateful for additional pointers and experiences:
Special #denmark #Danmark twist: #MitID #MobilePay apps ..
(update: on dk mastodon, i hear #MobilePay runs on #Jolla)
#sailfish #postmarketOS #Pine #purism #librem5 #liberty #jolla #linuxmobile
https://linmob.net/categories/weekly-update/
The best way to check if your current network provider (carrier) supports your 'phone/OS is to check for provisioning.
1. open your dialler
2. type *#*#4636#*#*
3. check the config options are enabled for:
VoLTE provisioned
WiFi calling provisioned
Unfortunately, a further recommendation is to use the Sony flashing tool, Emma, to downgrade the Android version. Emma only runs on Windows. I don't have a Windows PC. So, I will either need to borrow a Windows PC, or try it with Virtualbox/Qemu.
I suspect borrowing a Windows PC might be the easiest route.
A new epic adventure is about to begin. My quest is to have a privacy-respecting, and functional, mobile 'phone that can also make calls using VoLTE and WiFi calling. My travelling companion will be Sailfish OS. I'm not expecting it to be an easy journey.
My first step was getting a compatible 'phone. Here it is, my Sony Xperia 10 III. The Xperia is currently running Android 13. I'm going to revert it back to Android 11, as per the recommendation in the Sailfish docs.
One of the things I ordered yesterday was a @jolla C2 phone.
It has 4G (No 5G), you have to pay €4.99 for updates after the first year, and it has no NFC
It's a pure Linux (#Sailfish) device from within the #EU. I loved my #Nokia N900 and N9 despite the small app ecosystem but the #Jolla has an Android VM to run many Android apps
Some of us need to prove how well this stuff works to be get mass adoption of alternative open technologies not subject to #enshittification
https://fosstodon.org/@hweimer@fediscience.org/113860334556241682
Updated #Sailfish to 5.0 on my #Xperia 10ii. Seems to work and now microG also. However the #Jeep app still doesn’t log in. It doesn’t crash anymore but then just states login error after giving credentials. The network is a bit iffy so will need to investigate further. Also #AuroraStore got an update but after hitting update it closes down on start.
Actual native things so far work, but I haven’t yet done broader testing. Still a nice environment.
Sailfish OS 5.0 für alle unterstützten Geräte freigegeben
https://linuxnews.de/sailfish-os-5-0-fuer-alle-unterstuetzten-geraete-freigegeben/ #jolla #sailfish #xperia #linux
Sailfish OS Linux for Phones Gets 5.0 'Tampella' Update https://www.howtogeek.com/sailfish-os-5-0-tampella-release/
#jolla #sailfish
Sailfish OS 5.0 is now available for all supported devices. The latest version of the Linux-based OS brings an update to the Gecko browser engine and Android app support has been updated from Android 11 to 13. WireGuard VPN is also now supported. https://buff.ly/434Yzrk #Sailfish #Jolla #SailfishOS
Just going to say it, Sailfish OS needs to be on more devices. Personally, I wish it were available in Southeast Asia.
Even on a PinePhone, missing port functionality and meager hardware, it is evidently a very good OS. It is (mostly) open-source, stewarded by a company based in Europe, has a rather slick UI, and has comparable security with the major mobile OSes.
To continue on the theme of car use with phones, I’d really be tempted to move away from dependency on American phone platforms, in the current climate. In other words most likely @jolla #Sailfish.
But lack of #Carplay would be a massive drawback I might not easily be OK with (this is why we need open standards). But also lack of Jeep app, EV charging apps (until we get ubiquitous acceptance of payment cards).
@Setok @tuomas_h It was better in the early days of Android, but now it is #enshittified too.
What we really need is #LinuxPhone or #SailFish or other #OpenSource phone OS.
I really need to spend more time investigating, but it's a rabbit hole I really don't have time for right now.
@tuomas_h there are so many more interesting #Android phones out there than #iPhones right now. And at much better prices. The only downside is the software. I tried several times with it, but I just utterly cannot get along with Google. You get the feeling they never seem to properly care about design. Not in their culture (you can see it everywhere with them).
I love the #Sailfish design but sadly I feel a cultural shift needs to happen there too for commercialisation.
Da mein #PinephonePro mittlerweile einigermaßen brauchbar funktioniert, ist das Pixel 3a XL nun wieder zum Experimentieren verfügbar 
Vermutlich werde ich bald einen Teil meiner Freizeit dem #Sailfish #HADK widmen, @jabgoe2089@hub.netzgemeinde.eu 
A
[SK] 