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I am trying to install Sailfish on a new Xperia XA2 Ultra, as per Jolla website. With phone connected to PC, blue light on, Windows 10 cmd window: fastboot -i 0x0fce oem unlock 0x(...unlock code...) ..(with correct unlock code)..When I press enter, I get: < waiting for any device > ..indefinitely. No error messages.

Using Windows Powershell (as per Jolla), I did get error - the objection was to all of the 16-character unlock code: "The term '...unlock code...' is not recognised.."

Yes sa0114adb.inf installed as driver, Yes Device Manager shows "Sony sa0114 ADB Interface Driver", though with yellow warning triangle (as warned about in Jolla instructions), Yes the XA2 has Android 8.0.0 , not 9. No I have not, yet, found existing answer on this Jolla forum.

From the internet "adb" in general, to fastboot an Android phone, there is advice to use a different driver, but sa0114adb.inf is the only Sailfish one for XA2 Ultra. All other USB devices disconnected, no change.

So I seem to have run out of variables to apply to this fastboot. Please, can anyone help? ..