I last updated using the in-built system update function (a long time ago!)
Rooted/not rooted: not rooted
Build number: W_Phone-15.00.2004.111-20200403
Android version: 8.1.0
I've checked the website (bios and firmware),
and I think this is the most recent available version even for manual update.
(most recent version I found on the website: Version [8917/ Go] WW-15.00.2004.111 869.81 MB 2020/04/21), but if anyone has any other suggestions on how I might be able to update, please let me know!
Solved! Go to Solution.