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).

While spam call blocking sounds like a Pixel-exclusive, it turns out that any Android phone can achieve similar results with ...

Both iPhone and Android make it easy to connect to extension numbers using the built-in Phone dialer app. On both iPhone and ...

While most of us opt for texting or email to keep in touch with friends, family, and colleagues, sometimes there's just no substitute for picking up the phone and hearing the person's voice on the ...

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 ...