hence free phone calls for many people until the phone systems changed. the most popular device to modify was a radioshack tone dialer, a simple solder of a 6.5536 mhz crystal was all it took and ...

Credit: Mashable While the app is only available for iOS devices at this time, the company is working to bring the app to Android phones as well. Besides its burgers and shakes, Shake Shack is ...

RadioShack does not sell the pocket phone dialer anymore, but they do sell a DTMF chip (an NTE1690) that can do column D (the interesting bits that make all the phreakers happy).