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

Bob Camp kb8tq at n1k.org
Mon Aug 4 18:16:12 EDT 2014


Hi

I *think* it’s even more specific than that. I’ve watched it switch time driving down the road in Indiana. As we did zig zags over the time zone line, the iPhone quite happily changed displayed time. My guess was that it used GPS location info to decide which side of the line it was on. 

Bob

On Aug 4, 2014, at 1:19 PM, Glen Hoag <hoag at hiwaay.net> wrote:

> 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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