1) Gelly creams Or Oil
2) Victims smartphone
3) Celophine / wool
Step 1: Collect or Try to have an access to the victim Android smartphone!
Step 2: Take a clean stainless cotton or fabric and use it to wipe the victim smartphone screen properly & gently
Step 3: Now take another sample of the cotton wool and dip it/ feel it with the oily cream/ Gelly (very little sample)
Step 4: Now gently use it to wipe or clean the entire surface of the screen ( make sure it's not too oily / much).
Step 5: after unlocking, simply take a very deep/good look at the screen surface.... You'll see the pattern fully drawn.