I picked up a Samsung Galaxy 21 left without paying
How did you get away with stealing the Samsung phone?
I cut the wires of the alarm system of the shop and the CCTV.
Taking cell phones from a store is not legal and your theft of the Samsung Galaxy phone was wrong. Take the phone back and pay for it.
I can make fun of the guy since he didn't catch me.
You are lucky that you got away with it, but you should return the phone. Phone manufacturers can brick the phone so that it is not usable and you can have the phone traced to you.