Thanks for the question. you can use this tips If you are having trouble with your Samsung phone and it is working slowly, freezing, or crashing, you may be interested in resetting the device. This will reboot it and allow for the phone to function normally, if the issue is not severe.

In This article I will tell you through how to reset your Samsung phone without deleting any of your data.

Reset Code for Samsung Phones

dial #*7728# if you’d like to reset one of Samsung’s legacy model phones  and for using your phone’s calling feature,

If you have a  recent Samsung model (e.g. a Monte, an Omnia, etc.), dial *2767*3855# to reset your phone.

How To Restore Samsung Device to Factory Settings

How to unlock or disable PIN/Password/Pattern of Samsung Galaxy J1 Mobile
Now please follow the instructions carefully for disabling the Screen Lock of Samsung Mobile?
Step 1: Go to your Home Screen
Step 2: From the Home screen, tap the Apps Key
Step 3: Go to Settings > Lock screen & Security.
Step 4: Tap Select PIN/Password/Pattern
Confirm your unlock information (if necessary).
Tap None.

Note: Always remember that you need to provide your current screen lock to unlock the screen or set new lock screen. (As for example, suppose your current screen lock is Pattern Lock and Now you want to set face Lock as your default screen lock. Then you need to unlock your Pattern Lock first. Finally, you can set a new screen lock. )

Read More: How to unlock or remove Samsung Galaxy Mobile’s pattern lock? 
Changing Your Samsung Mobile Screen Lock

If you find that simply resetting your phone does not work for you, you may need to move on to perform a hard reset on your device. This will remove all of your personal information, but it may also clear up any system issues that you might have.  For more information about how to hard reset your Samsung device, please visit: Samsung Hard Reset Codes and info