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- 12-25-2003, 10:08 PM #1AboutdakotaGuest
A question has been plaguing me this holiday season. GAIT phones use
the ESN to authenticate with AMPS/TDMA, and the IMEI on the SIM to
authenticate with GSM.
Well, interesting thought. If I activate a SE T62u on a national GAIT
plan, then take that SIM out and put it into a GSM phone, and put some
kind of "dummy" SIM (one that was disconnected), would the GAIT phone
function? Since I am sure that the IMEI could not be authenticated over
TDMA, what would the outcome be?
I notice that my voice memos are stored on the SIM, as they follow me
from phone to phone. I am also confident that IRDB's for both TDMA and
GSM are stored on the SIM. If a discontinued SIM was placed in the
phone, how would the TDMA system know the difference? The T62u allows
you to select TDMA Only or GSM Only modes.
I don't plan on trying this, but it's an interesting thought, isn't it?
==AD
› See More: GAIT = 1 TDMA and 1 GSM Phone?
- 12-26-2003, 01:05 PM #2Chris RussellGuest
Re: GAIT = 1 TDMA and 1 GSM Phone?
I've always seen it posted that the GAIT sim card is unique since it
must have the TDMA/AMPS info on it also. I think the GAIT phone would
only dial 911 with the 'dummy' sim if even that.
Chris
Please respond on Usenet
Happy Holidays!
Aboutdakota <[email protected]> wrote in message news:<[email protected]>...
> A question has been plaguing me this holiday season. GAIT phones use
> the ESN to authenticate with AMPS/TDMA, and the IMEI on the SIM to
> authenticate with GSM.
>
> Well, interesting thought. If I activate a SE T62u on a national GAIT
> plan, then take that SIM out and put it into a GSM phone, and put some
> kind of "dummy" SIM (one that was disconnected), would the GAIT phone
> function? Since I am sure that the IMEI could not be authenticated over
> TDMA, what would the outcome be?
>
> I notice that my voice memos are stored on the SIM, as they follow me
> from phone to phone. I am also confident that IRDB's for both TDMA and
> GSM are stored on the SIM. If a discontinued SIM was placed in the
> phone, how would the TDMA system know the difference? The T62u allows
> you to select TDMA Only or GSM Only modes.
>
> I don't plan on trying this, but it's an interesting thought, isn't it?
>
> ==AD
- 12-26-2003, 03:01 PM #3bones boyGuest
Re: GAIT = 1 TDMA and 1 GSM Phone?
On Thu, 25 Dec 2003 22:08:12 -0600, Aboutdakota
<[email protected]> wrote:
>A question has been plaguing me this holiday season. GAIT phones use
>the ESN to authenticate with AMPS/TDMA, and the IMEI on the SIM to
>authenticate with GSM.
>
>Well, interesting thought. If I activate a SE T62u on a national GAIT
>plan, then take that SIM out and put it into a GSM phone, and put some
>kind of "dummy" SIM (one that was disconnected), would the GAIT phone
>function?
No it won't. I have a SE T62u and a HS Treo 600. I use the t62u for
the rural areas and the Treo 600 in town. I swap out the SIM when
changing phones. Both phones will not operate at the same time -
unless you have two SIM cards programmed to the same number, which my
corporate rep tells me is impossible.
So, there has to be some ESN information matching up with the
information on the SIM (one would assume).
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