[time-nuts] How are iPhones' clocks set under LTE?

[Brian Garrett]

I've heard that people who live near time zone boundaries (very near, like 
within a mile or two) often have to switch automatic setting off, because 
the time might be an hour off depending on which tower their phone connects 
to.  the annual switches to and from daylight saving time can cause one-hour 
discrepancies too.  Fortunately, in this case, turning automatic setting off 
and then turning it back on forces a re-sync, thus supplying your phone with 
the right time.

-----Original Message----- 
From: Glen Hoag
Sent: Monday, August 04, 2014 10:19 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] How are iPhones' clocks set under LTE?

As someone who crosses time zone boundaries with relative frequency, I can 
tell you that the iPhone does indeed set it's time zone automatically, based 
on information the phone gets from the cellular network.

Sent from my iPhone

> On Aug 4, 2014, at 11:49, Chris Albertson <albertson.chris at gmail.com> 
> wrote:
>
>> On Mon, Aug 4, 2014 at 5:38 AM, BIll Ezell <wje at quackers.net> wrote:
>>
>> Clearly, just using something like NTP directly isn't all that useful
>> because you have to know your physical location to know what timezone
>> correction to appl
>
> I'm pretty sure you have to set the time zone that is displayed.  It
> does not change based on location.  Although one col writ an app that
> would do that.  There are MANY clock apps some show multiple time
> zones.  Interannly the phone uses GMT (offset zero)
>
>
> -- 
>
> Chris Albertson
> Redondo Beach, California
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