[header] How to make a phone camera into night vision [title] Get your hands on an old mobile phone. [step] Remember, this hack isn't really reversible so don't do this on a camera you want to use in the future. [title] Open up the phone with a screwdriver and find the camera. 
[title] The camera will have an unscrew-able lid where the lens is. [step] Unscrew it and remove the plastic containing the lens.