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Socoder -> Handheld Coding -> Can I hack it?

Tue, 24 Jan 2012, 10:23
jedimastersterli
Ok so I don't know how to program for smart phones, and don't really want to learn just now. I have enough trouble with PCs and mechanical actuators. I do want to know however if it's possible to take time from the cell phone emitter, and piggy back on the receiver.

I want to be able to use the emitter to send messages to another device which would be unintelligible to a cell tower, other phone, or really anything that wasn't programmed to receive them. If a million cell phones can run on the same frequency I don’t doubt it's possible, all you have to do is make a unique code for that application. The question is will the hardware in the phone let me do that or is it set in stone reserved for calls only. Also it would be great if i could examine received signal from another non phone device. I was thinking something like save incoming transmission, examine them against phone signal and if that doesn't work examine them against special signal and from there decide to interpret it as a call, or as input for an app.

If that doesn't work there’s always blue tooth, but using the phones powerful built in emitter would be preferable.

Tue, 24 Jan 2012, 11:20
shroom_monk
Is there any particular reason it has to be done on a phone? As far as I'm aware modifying a phone transmitter is far more difficult that building your own transmitter.

At any rate, it's worth pointing out that millions of mobile phones don't run on the same frequency - all the phones in one area all use different frequencies, so the mast closest to them can tell them apart. This is where the 'cell' in 'cellphone' comes from - the map is divided into cells, each with its own mast, and all the phones in a single cell use different frequencies. So it's not as easy as making 'a unique code for that application'.

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Keep It Simple, Shroom!
Tue, 24 Jan 2012, 13:13
spinal
I'm sure various government agencies would get involved if you started sending top secret data by piggybacking under the radar of the telephone companies.

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