We make door locks which has a receiver it can be locked or opened via receiving a password as long sequence of numbers when transmitted to it from the cellular phone where each lock when it is sold a plastic card comes with it containing password when we scratch and reveal the password and we input it in the cellular phone and save it, then the door lock will open when we press a button on the cellular phone and will be locked when we press the button again, as well the cars come with a plastic card and the same is done as explained before so by the cellular phones we can lock and unlock the car, the same can be done for the garage gate and office doors, ATM card will be replaced by a password saved in the cellular phone as explained above.