The fingerprint reader issue is one of those long-standing problems that can make any Sony fan shrug. If you are only hearing about it now, it basically boils down to this - ever since the Xperia Z5 family, a number of Sony devices have featured a fingerprint reader, embedded in the power button on the side. However, those same devices ended up with a disabled reader on the US market. Now the brand new XZ Premium and XZs are also joining the same group and are said to omit the biometric security measure in the US as well. When previously asked to comment on the matter, the Japanese...
Source: http://www.gsmarena.com/turns_out_sony_cant_legally_enable_its_smartphone_fingerprint_readers_in_the_us-news-23704.php
