Samsung Galaxy Tab A 7.0 (2016) 8 ГБ черный (SM-T 280 NZKASER) 用户手册

Basics

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A PIN consists of numbers only. Enter at least four numbers, and then enter the password 
again to verify it.

A password consists of characters and numbers. Enter at least four characters including 
numbers and symbols, and then enter the password again to verify it.

When you receive new notifications, indicator icons appear on the status bar. To see more 
information about the icons, open the notification panel and view the details.
To open the notification panel, drag the status bar downwards. To close the notification panel, 
swipe upwards on the screen.