When you're not using the LYF mobile phone, press the Power key button to lock the phone. Locking the phone puts the display to sleep, saves the battery, and prevents anything from happening if you touch the screen. You can still get phone calls, text messages, alarms, and notifications. You can also listen to music and adjust the volume.
On WIND, the Power key button is the third button on the right side (below Volume keys) :
1. To turn Phone on: Press and hold the Power key button until the LYF logo appears.
2. To unlock Phone: Press either the Power key or Home button to unlock the device.
3. To turn Phone off: Press and hold the Power key button.
4.To reboot Phone : Long Press 10-12 Sec to reboot handset
Phone locks automatically if you don't touch the screen for 1 min. To adjust the timing, go to Settings. Under "DEVICE", select "Display" > "Sleep".
If you don't use these buttons often, they may shrink to dots or fade away, depending on the current app. To bring them back, touch their location on your device.