I just received an Xperia X Performance bought from B&H Photo. I knew beforehand that the fingerprint sensor is disabled on the US version of the phone because of reasons, but I read on the Z5 forums that it can be enabled by flashing a firmware from another region.
So... I went on and tried with the Customized NL firmware and voila. It just works. I used FlashTool and XperiFirm to get the firmware. Easy peasy, it's not even necessary to unlock the bootloader.
So... I went on and tried with the Customized NL firmware and voila. It just works. I used FlashTool and XperiFirm to get the firmware. Easy peasy, it's not even necessary to unlock the bootloader.