I bricked my XA2 Plus too H4493, dual sim 64 Gb.
“Update unsuccessfull”, automatically reboots, then now stuck at sony logo.
Try to use fastboot (as a message on together jolla website suggests on previous similar issues for XA2), driver installation is not working properly (Android device recognized with a “!”, like the tutorial suggests, then when manually installing Xperia X driver, at the very end, after a so called successfull installation, the device still is recognized as an android device (but then with a “?” on the logo, and a message in the device properties telling something like this device seems not to need any driver)… So it seems that fastboot is no more an option for me.
I did not try on a macos or Linux computer, but tried on two windows 10 computer, and device plugged on USB3 and the on USB2 ports.
Tried Emma tools. Device is recognized (there may be hope?), but H4493 seem to be a non supported device (!) So I am stuck too.
Tried Xperia companion. Device is recognized as unlocked, so no dice.
I never owned an android device (I mean, I have no experience on it, especially on rom flash or so. The only time I did that was for sailfish OS, and I just follow the instructions) so I am quite hopeless for now. Any suggestion? Other than buy another phone of course?
Edit: Ah, I forgot to say. No patch installed. A few apps from openrepos, but nothing known to create such mess.
Edit 2: Tried to install XA2 Plus driver on a third PC, with windows 10 pro 1904 (the two first have version 2004). Driver is working properly (maybe something to do with 2004 windows version; the first computer I tried was the one I used to flash my phone years ago and nothing really change on it except windows version), so I am back to sailfish 3.3. Will try now to update to 3.4 in a vanilla state, without installing anything, since I still own a jolla C and can use it for now. Hope it will work properly!