Can I stop a mobile from =?windows-1252?Q?transmitting/receiving?==?windows-1252?Q?=85=3F?=

Simon wrote:
> I have an old (Nokia 6610i) mobile that I want to give to my son to play
> some Java games on. Is there a way to stop the phone transmitting /
> receiving / trying to get on a network?
>
> Cheers
>
> Simon.
>
> PS the mobile is ‘expendable’!

This thread has so many misconception's regarding how to stop the phone
transmitting it is beyond belief!

Unless it has an OFF LINE or FLIGHT mode the phone will continue to
attempt to connect to a network, therefore TRANSMIT. Even if an
inactive SIM is refused access to it's original network it will continue
trying to register!

Removing an antenna will NOT stop the phone from transmitting! It will
actually increase power in attempt to connect to a network, it may not
radiate the signal very well but it will still transmit.

Sure 999, 112, 911 or any other Emergency number may be rejected by UK
carriers but the phone still attempts to make such calls and therefore
is transmitting.

I certainly would not want a child playing with a mobile phone that is
transmitting any signal at or above 900MHz, sure the jury is still out
on the potential dangers but are you prepared to take that risk?

The best option in my opinion is find an alternative *toy* for the child
to play with.


--
The views I present are that of my own and NOT of any organisation I may
belong to.

73 de Simon, VK3XEM.
<http://web.acma.gov.au/pls/radcom/client_search.client_lookup?pCLIENT_NO=157452>

<hairydog@despammed.com> wrote in message
news:t23ak2ht2ejotauu658eum2e88dvivct72@4ax.com...
> On Sat, 28 Oct 2006 06:29:32 GMT, "Anonymous" <anonymous@net.org>
> wrote:
>
>>Not sure if I got this comment but this phone (as it does not support
>>"off-line mode", would always be able to dial emergency calls if on
>
> No, it would not. No UK network would accept an emergency call.

To be accurate, the phone would attempt to call the emergency number but it
would never get connected (in UK) and then only marginally bothers the
network, not at all the emergency centre. I guess this is what you also
meant.

"Simon Templar" <usenet@vk3xem.net> wrote in message
news:45457612$0$4668$61c65585@un-2park-reader-01.sydney.pipenetworks.com.au...
> Simon wrote:
>> I have an old (Nokia 6610i) mobile that I want to give to my son to play
>> some Java games on. Is there a way to stop the phone transmitting /
>> receiving / trying to get on a network?
>>
>> Cheers
>>
>> Simon.
>>
>> PS the mobile is ‘expendable’!
>
> This thread has so many misconception's regarding how to stop the phone
> transmitting it is beyond belief!
>
> Unless it has an OFF LINE or FLIGHT mode the phone will continue to
> attempt to connect to a network, therefore TRANSMIT. Even if an inactive
> SIM is refused access to it's original network it will continue trying to
> register!
>
> Removing an antenna will NOT stop the phone from transmitting! It will
> actually increase power in attempt to connect to a network, it may not
> radiate the signal very well but it will still transmit.
>
> Sure 999, 112, 911 or any other Emergency number may be rejected by UK
> carriers but the phone still attempts to make such calls and therefore is
> transmitting.
>
> I certainly would not want a child playing with a mobile phone that is
> transmitting any signal at or above 900MHz, sure the jury is still out on
> the potential dangers but are you prepared to take that risk?
>
> The best option in my opinion is find an alternative *toy* for the child
> to play with.
>
>
> --
> The views I present are that of my own and NOT of any organisation I may
> belong to.
>
> 73 de Simon, VK3XEM.
> <http://web.acma.gov.au/pls/radcom/client_search.client_lookup?pCLIENT_NO=157452>

Simon, you normally have accurate comments but if we talk about a GSM phone
(OP was talking about a GSM phone), the phone when trying to register, would
use the output power as advised from the network. It would never increase
its output power after a failure. And the phone would never even attempt to
transmit anything before it has all the necessary system information from
the network. Assuming its receiver is disabled (removing the antenna is not
sufficient for that, close to the base the phone could still get the signal,
I was talking about disabling the receiver, short circuit the receiver input
or something similar), the phone would never transmit (on GSM).

I leave it to each person to judge if the short signalling related
transmission for an emergency call attempt has health issues for a child,
the fact in the UK case is that there would not be a call, just a few
messages sent on the signalling channel. The same at power on, once. This
anyway is marginal compared to all the rest of the RF exposure at home or
anywhere else.

On Mon, 30 Oct 2006 06:20:43 GMT, "Anonymous" <anonymous@net.org>
wrote:

> I guess this is what you also
>meant.

Yes, a few packets of data till the rejection response, and no more.
Probably less RF than from a peizo lighter being started.

--

Iain
the out-of-date hairydog guide to mobile phones
http://www.hairydog.co.uk/cell1.html
Browse now while stocks last!

On Mon, 30 Oct 2006 14:49:34 +1100, Simon Templar <usenet@vk3xem.net>
wrote:

>Unless it has an OFF LINE or FLIGHT mode the phone will continue to
>attempt to connect to a network, therefore TRANSMIT.

If the handset has a sim card in it, it will transmit for a very brief
time in an attempt to register. If refused because the sim ins no
longer active, it will stop trying. It will possibly try each of the
other available networks, but only once each,.

>Even if an
>inactive SIM is refused access to it's original network it will continue
>trying to register!

That's not correct, as far as I know. It would only retry if it had
failed to get a response from the network. Once the network has said
"No" it won't try again.

So we are talking about a few milliseconds shortly after it is
switched on. After that it won't transmit at all, unless someone tried
to make an emergency call, when it would try each network once more
before failing and giving up.

--

Iain
the out-of-date hairydog guide to mobile phones
http://www.hairydog.co.uk/cell1.html
Browse now while stocks last!

hairydog@despammed.com wrote:
> On Mon, 30 Oct 2006 14:49:34 +1100, Simon Templar <usenet@vk3xem.net>
> wrote:
>
>> Unless it has an OFF LINE or FLIGHT mode the phone will continue to
>> attempt to connect to a network, therefore TRANSMIT.
>
> If the handset has a sim card in it, it will transmit for a very brief
> time in an attempt to register. If refused because the sim ins no
> longer active, it will stop trying. It will possibly try each of the
> other available networks, but only once each,.
>
>> Even if an
>> inactive SIM is refused access to it's original network it will continue
>> trying to register!
>
> That's not correct, as far as I know. It would only retry if it had
> failed to get a response from the network. Once the network has said
> "No" it won't try again.
>
> So we are talking about a few milliseconds shortly after it is
> switched on. After that it won't transmit at all, unless someone tried
> to make an emergency call, when it would try each network once more
> before failing and giving up.

My Nokia N73 is sitting in it's car kit at present with a SIM that is no
longer active on the network and it is regularly attempting to register.


--
The views I present are that of my own and NOT of any organisation I may
belong to.

73 de Simon, VK3XEM.
<http://web.acma.gov.au/pls/radcom/client_search.client_lookup?pCLIENT_NO=157452>

> My Nokia N73 is sitting in it's car kit at present with a SIM that is no
> longer active on the network and it is regularly attempting to register.
>
>
> --
> The views I present are that of my own and NOT of any organisation I may
> belong to.
>
> 73 de Simon, VK3XEM.

This is an interesting observation. I assume this is SIM card is for one of
the local networks. The home network should normally reply with a reject
cause that forces the mobile to abandon all future attempts until the phone
is switched off. If other local networks don't provide roaming to the home
operators of this SIM card, they should reply with a "forbidden PLMN" which
info is stored to the SIM and as somebody previously mentioned, the phone
should not make even a single attempt to register to those networks, not
even after power off/on cycle.

The phone could always be faulty but otherwise this behaviour could appear
if the network responded with a location area reject. This would force the
mobile from further registration attempts until the location area changes.
The location area can change when the mobile is stationary (at a location
area border) but normally one would need to travel through a number of
cells. Would be interesting to know more accurately what "regularly" in your
case means. Is it a clear period (approximate time for that) or is it
related to moving across location area borders?

Some phones have an engineer mode too, would be interesting to see the
reject cause values from the network in your case.