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Cellular forums Home > Archive > Cellular GSM Technology > July 2005 > GSM phones automatically setting the time
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GSM phones automatically setting the time
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| Miguel Cruz 2005-07-15, 4:55 pm |
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I've used my phone in several countries, but not until I landed in the USA
did it offer to update the time to the local time zone. While in the USA,
each time I moved to a new time zone, the phone let me know and offered to
update the time again.
Why doesn't this happen in other places? It seems like a very helpful
feature.
miguel
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| matt weber 2005-07-15, 10:55 pm |
| On Fri, 15 Jul 2005 09:32:31 -0500, mnc@admin.u.nu (Miguel Cruz)
wrote:
quote:
>
>I've used my phone in several countries, but not until I landed in the USA
>did it offer to update the time to the local time zone. While in the USA,
>each time I moved to a new time zone, the phone let me know and offered to
>update the time again.
>
>Why doesn't this happen in other places? It seems like a very helpful
>feature.
>
>miguel
the phone has to support the feature, and the service provider has to
haver it. Outside the USA, it seems to be rare among the service
providers
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| Joseph 2005-07-16, 6:55 am |
| On Fri, 15 Jul 2005 09:32:31 -0500, mnc@admin.u.nu (Miguel Cruz)
wrote:
quote:
>I've used my phone in several countries, but not until I landed in the USA
>did it offer to update the time to the local time zone. While in the USA,
>each time I moved to a new time zone, the phone let me know and offered to
>update the time again.
>
>Why doesn't this happen in other places? It seems like a very helpful
>feature.
That feature is called NITZ (network initiated time zone.) It is not
in the original GSM spec and can be optionally used. In the US
cingular/AT&T Wireless and T-Mobile use it. T-Mobile was introducing
NITZ gradually throughout their system. I've not found NITZ in use in
Europe or in Israel.
- -
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| Michael Pronay 2005-07-16, 6:55 am |
| matt weber <mattheww50@cox.net> wrote:
quote:
> the phone has to support the feature, and the service provider
> has to haver it.
Most phones (if not all) do support NITZ, most service providers
don't.
M.
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