mobile as antenna repeater

Is it possible to use a mobile cell as antenna repeater?
is there any app to use old phone as antenna repeater?
Thanks

GSM uses dedicated uplink and downlink channels. A mobile phone isn't allowed to send on a downlink channel to connect to another phone, neither this operation will be supported by it's internal software.

In so far the answer is a clear no.

If you can connect to another phone directly, without going through the tower, then the whole economy will collapse!

Such things cannot be allowed at all. It is sinful to think of such things.

But the real truth is that the hardware is already there.

Beyond economic and moral categories, peer-to-peer operation is simply not provided by the system design. Other wireless standards like Tetra implement it.

Here is the solution

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Good joke. Looks like peer-to-peer but physically isn't.

Thanks
I think this is a good concept to " whole economy collapse".

FvM said:

GSM uses dedicated uplink and downlink channels. A mobile phone isn't allowed to send on a downlink channel to connect to another phone, neither this operation will be supported by it's internal software.

In so far the answer is a clear no.

Click to expand...

Hi! It implies that in TDD ( Time Division Duplex ) mobile systems , e.g. TD-CDMA , TD-SDMA ... a user may have a software that enables the mobile phone to use as antenna repeater?! Any idea?

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E Kafeman said:

Here is the solution

Click to expand...

Push-to-Talk uses GPRS or EDGE channels to send voice ( it is VoIP ) , and not a direct connection between two mobile sets.

Actually, it is not quite that clear cut.

Two, maybe three years ago I saw a demonstration at the CCCs annual conference of a mobile phone with slightly hacked radio section being used as the RF section of an OpenBTS base station....

So, yes, you probably could do it, but it goes some way past being just an app on an old phone (Think RF section surgery to allow TX on the downlink frequency, surgery to provide a sufficiently precise reference clock to the thing, GPS is **REALLY** picky about time and some major work to find an exploit in the radio firmware that could be used to take control, IIRC the best target for this was a particular old Motorola set).

It was an utterly moby hack, but not possibly the most practical thing....

Regards, Dan.

It was an utterly moby hack, but not possibly the most practical thing....

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That had been also my assumption, the chipset will basically allow it, but you need to rewrite the software from the scratch. Didn't consider the OP being able to do it.

Push-to-Talk uses GPRS or EDGE channels to send voice ( it is VoIP )

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Thanks for the clarification, some kind of early Whatsapp then.