How To Samsung M31 Hard Reset | pattern unlock | pin unlock |

1.  plug in your mobile to your computer
   

2. turn of mobile ( press volume down and power key at the same time )

    
    
   

3. press volume up and power key

   
   
   

    

    

    

    

4. continue pressing volume up button and power key
   

5. release the power key after appear Samsung logo 

6. you will see android recovery interface