I was always under the impression that the phones which contacted each
other directly did so through the network, but since it was all on the
same network they didn't charge you for it.  They simply billed it as
walkie-talkie type communication, but you still had to be within the gsm
area so the network could get you going.

What is the distance limit between two gsm phones that talk to each
other?  Do you suppose that they talk directly when they are close, and
indirectly (network) when they are not?

-Adam

John Walshe wrote:

>Hi Guys,
>    Does anyone know of a way to use a GSM phone in a "walkie-talkie" type
>of configuration without using any cellular networks. I have two that were
>left behind by upgrading and it would be very handy to use them for two way
>communication around my home area(which incidentally is a cellular blackspot
>!). Is there some way to stop the phone searching for a network. Any info
>would be welcome
>
>John
>
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