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Technology changes with each passing day, people buy new phones much more frequently. Not because their phones are broken, but they just dont want to fall behind with fashion. What an out of date 3G phone can do? Locked in the Safety deposit box or throw it away? How about reuse some of its function!
Exploit the basic function of a 3G phone, image and voice record, to a housing monitor. Phone cam will supply power to the 3G phone, keep the phone recording image and voice, save data in the device SD card. Once there is something happened, user can have additional protection. Not only prolong 3G phones life, but also cost down the housing safety system.
National Taiwan University of