cell phone programming

Need programming that will temporary disable cell phones anntenna when our external device (with your code) is attached to cell phone's data port. Cell antenna is returned to normal usage when external device is detached from data port. Need programming on two cell phone models to do demonstration to investors: "smart" phone (like Blackberry 7100t, Siemens SX66 or anything else you may already have programmed) and "dumb" phone (Motorola StarTAC or anything else you may already have programmed). Program must not disable cell phone's firmware: the PDA features, contacts etc must still be working.