Old Xperia Smartphones are capable of wake up the screen with two taps on the screen. Other comapanies like One plus provide gesture support in sleep mode. New Xperia phone, specially Xperia XZ1 series and XZ Premium lacks atleast two taps wake up. Super fast fingerprint sensor unlock the screen as soon as we press the power button, very hard to check time etc. Please bring back two tap wake up.