Unlock Android Pattern/Pin Lock in Emergency mode

1-First of all, you need to switch off your android device and keep it for some time.

2- After switching of your android device, press your up ↑ volume button and Press It down.
3- Now press the power button and hold it too along with the volume up button.
4- It will start a secret terminal interface.
5- Then press to use home button for scroll volume up and down.
6- Then you will get to the choose option Delete All User Data.
7- Now in this way, your android lock pattern is unlocked now problem is solved.
Your device will take some time but after it will restart and you will find out your android device has been unlocked.

Use Samsung's 'Find My Mobile' Service

If you have a Samsung device, a similar service called Find My Mobile should be the first thing you try. Start by heading to this link from any web browser, then log into your Samsung account. If you never set up a Samsung account, this method will not work, unfortunately. Also, some carriers, like Sprint, lock out this service, which is something to keep in find.

Once you've logged into your Samsung account, click the "Lock my screen" button in the left-hand pane. From here, enter a new PIN in the first field, then click the "Lock" button near the bottom of the screen. Within a minute or two, your lock screen password should be changed to the PIN you just entered, which you can use to unlock your device.

Top screen locks apps

There are lots of screen lock apps are available at google play.But some apps have amazing features.So below there are some lits of screen lock apps.

 1. Time lock

Main functions of this application

Lock 
Lock your screen lock as long as you selected.you can make call during the lock
Countdown
Simple countdown timer
Perfect for every location

2. Lock lock

This is a lock which is not exactly a lock screen. Isn’t irony it? But this lock screen is much more fun than any lock screen could be. It is recommended to try this lock screen app if the user wants to have some fun but the fun along with the friends and not alone.The idea of the app is so simple. Install this app on the user’s device along with their friends and form a group. The people in the group will have the same lock screen as it could be compared with a whiteboard. So, now the user can just draw and done. That is going to be updated with others members of the group, who will soon see it when they pick their devices.