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Mon, Dec 20, 2021 12:44 AM

Support for Sony Xperia 1 (mk I) on 5G network

I notice that the most recent version of AT&T's "supported devices" document (December 15, 2021) includes an entry for 
  > Xperia 1* (J8170)
where the asterisk indicates that a software update is supposedly required for this device.

What kind of software update is this referring to? Where is that software update supposed to originate from? Sony?
What about other Xperia 1 (mk I) models? J9110?

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