What is a Soft Reset and what the Soft Reset does? The Soft Reset is the easiest reset to perform on a mobile phone.
To Soft Reset a phone is to simply power cycle the device, to power it off and then to power it back on.
The soft reset can actually solve many simple problems on mobile phones, especially when the phone has been on for a long period of time and has not been power cycled for a while.
1. Soft reset is really easy and can be done in less then a minute, first unlock your screen and hold down power button.
2. Wait untill you will see a menu like this one.
3. Now just tap on Reboot option and your phone will restart itself.
4. And this is it, your device should work less laggy after that.