Link aus dem Sony eSupport Forum. Eventuell hilft es dir.
https://us.en.kb.sony.com/app...

I also thought that you could install apps. But it doesn't work with this firmware. And unfortunately I haven't found a way to "adjust" these stupid region code restrictions.
But! The little thing is really fun. And with the pre-installed app "Opera TV" you can get a lot of streaming content. Some of it is "free" (media libraries), but much of it has to be paid for with a subscription.
But the best thing is that my entire music collection and all the cat videos from my NAS come onto the big screen. :-)
So I like the little box. Only the regional restriction has to go!

I have the same problem... You've got to be kidding, a handful of apps, 90% unusable, but DAZN, Amazon Video etc. are missing. Actually a reason to return the device.