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Today 10 years ago I got a Firefox OS phone
(jemmy.jeena.net)
This is a most excellent place for technology news and articles.
Also Sailfish OS (though it's not fully open source), which I use.
I sincerely hoped Jolla would at least continue to make one technology demonstrator hardware model available for purchase by enthusiasts. The current situation where I have to buy a phone and then buy OS separately is not feasible for me.
I mean, the license cost me $50 (maybe €50, not sure). It's not that much, just pretend the phone cost $50/€50 more.
Jolla can also be purchased and used in very few countries. 4 according to their list. I don't mind paying for an OS and a phone, but their phone support is also only for very expensive Sony Xperia phones. So I can see why it is not feasible for a lot of people
If you mean the OS, it can be purchased in all of European Union plus some other countries. With VPN you can purchase it everywhere. Though I read that the Xperia phones don't have the necessary bands for USA.