How can you destroy a SIM card at home?

Answer 1

Just drop it in water. After that, put it in a plate inside a microwave oven. Use a glass of water near, to protect the oven. In 30 seconds the water inside the SIM card will vaporize, and it will be unusable, whitout a visible trace. I tested this method and it works fine!

Answer 2

cut it up?

Melt it? - tho I'd do it outside as i guess it will smell awful, and I wouldn't breathe in any smoke.

Answer 3

You can destroy a sim card without any physical damage by dipping the SIM Card in water. This will render the sim card unreadable, but won't cause physical damage.