I’ve no idea on the relockable bootloader support with self signed keys. Though I do remember reading at some point from some lad ranting about why it’s a bad idea to relock, and seemed to make sense, so I didn’t look further into the matter. The post was on the… ehm… other website.
Aye, they have unlockable bootloaders and sony also provides instructions and firmware needed to build your own AOSP if that’s your pleasure. I just went the lineageOS way.
That’s a damn shame. I really liked their phones, their only downside, I think, was the crap support - they only give 2 years of updates. But with lineage that is no longer an issue.
Have you looked at what sony has to offer? They latest xperia had a headphone jack, sd card and I believe lineageOS support.
i installed lineageOS on an xperia 5 ii, so older model, and seems to be going strong. got latest update 1 week ago.
I mean, you already have 12 phalanges on one hand (3 each, from 4 fingers) and you can use your thumb as an indicator.