Discussion
el stovey said:
Zoon said:
HoHoHo said:
Strange thing happened on my recent flight to Tokyo on Thursday......
I had a look at the Internet to see how to change the time on the flight to move forward from GMT but it appears you can't do that, you can't fool the watch into thinking it's in a different country (albeit some describe how to do it, but it doesn't work).
About 8 hours into my flight having not done anything prior to the flight and with my iPhone and watch in flight mode the time moved into Tokyo time by itself.
How the feck did it do that?
Time from the GPS chip?I had a look at the Internet to see how to change the time on the flight to move forward from GMT but it appears you can't do that, you can't fool the watch into thinking it's in a different country (albeit some describe how to do it, but it doesn't work).
About 8 hours into my flight having not done anything prior to the flight and with my iPhone and watch in flight mode the time moved into Tokyo time by itself.
How the feck did it do that?
Blown2CV said:
el stovey said:
Zoon said:
HoHoHo said:
Strange thing happened on my recent flight to Tokyo on Thursday......
I had a look at the Internet to see how to change the time on the flight to move forward from GMT but it appears you can't do that, you can't fool the watch into thinking it's in a different country (albeit some describe how to do it, but it doesn't work).
About 8 hours into my flight having not done anything prior to the flight and with my iPhone and watch in flight mode the time moved into Tokyo time by itself.
How the feck did it do that?
Time from the GPS chip?I had a look at the Internet to see how to change the time on the flight to move forward from GMT but it appears you can't do that, you can't fool the watch into thinking it's in a different country (albeit some describe how to do it, but it doesn't work).
About 8 hours into my flight having not done anything prior to the flight and with my iPhone and watch in flight mode the time moved into Tokyo time by itself.
How the feck did it do that?
No wifi or signal at 37000 feet over Russia etc. So the only explanation can be Google Earth was able to identify where I was and alter the time accordingly.......which was happening.
I know, I was watching it happen!
Edited by HoHoHo on Thursday 5th May 21:04
HoHoHo said:
How do you explain my phone changing time in the air?
You're both right. Time is typically synchronized via NTP, which requires a working data connection (wifi or mobile) for the phone. But, that's "Universal time", not "local time". For local time, we need to know what timezone we're in, and that's found using the phones location service, which - if enabled - means GPS. If GPS isn't enabled or available, then the phone may be able to triangulate a position based on the ID's of nearby masts, and looking up those IDs in a table which contains the lat. and long. of every known base station - this again normally requires a data connection.
silentbrown said:
HoHoHo said:
How do you explain my phone changing time in the air?
You're both right. Time is typically synchronized via NTP, which requires a working data connection (wifi or mobile) for the phone. But, that's "Universal time", not "local time". For local time, we need to know what timezone we're in, and that's found using the phones location service, which - if enabled - means GPS. If GPS isn't enabled or available, then the phone may be able to triangulate a position based on the ID's of nearby masts, and looking up those IDs in a table which contains the lat. and long. of every known base station - this again normally requires a data connection.
https://en.wikipedia.org/wiki/NITZ
Blown2CV said:
silentbrown said:
HoHoHo said:
How do you explain my phone changing time in the air?
You're both right. Time is typically synchronized via NTP, which requires a working data connection (wifi or mobile) for the phone. But, that's "Universal time", not "local time". For local time, we need to know what timezone we're in, and that's found using the phones location service, which - if enabled - means GPS. If GPS isn't enabled or available, then the phone may be able to triangulate a position based on the ID's of nearby masts, and looking up those IDs in a table which contains the lat. and long. of every known base station - this again normally requires a data connection.
https://en.wikipedia.org/wiki/NITZ
I'm guessing through Google maps it knew where it was, therefore knew what the time was. That then begs the question does it know if it's summer time etc. and I'm guessing that's fairly straight forward, it talks to the calendar on the phone which is aware when the clocks go back or forward.
Anyway, the time did change, was correct and with no wifi or phone signal.
Blown2CV said:
any IP device can use NTP yes, but that requires a data connection which you likely won't have without manual intervention when travelling to or through faraway places. Generally speaking, mobile devices obtain timezone info first using NITZ through the GSM network at the time of providing the network ID (I.e. right up front), not through IP calls over data connection.
https://en.wikipedia.org/wiki/NITZ
NITZ is poorly supported AFAIK (still not on EE, methinks). I'm 99% sure that Android phones these days update TZ automatically from location services even if NITZ isn't present.https://en.wikipedia.org/wiki/NITZ
I remember years back with NITZ updates that I'd travel to the US and my phone time would automagically update, but when I returned to the UK it would be stuck on US time...
Sheetmaself said:
Could i ise it as a satnav screen for google maps in offline mode? Would be really iseful to download a place to iphone and ise offline google maps but sent to the watch instead of checking the phone all the time.
You could but you'd need to download the maps for the entire route! Possibly a large download...Blown2CV said:
You could but you'd need to download the maps for the entire route! Possibly a large download...
Brilliant thanks for that, i often do it and download to my phone but am weary at times of keep getting phone out to check directions especially in places where theft is high. At least with the watch it would be less obvious. Either that or they'll nick the phone and the watch only leaving behind my wife to remind me she told me so!
silentbrown said:
Sheetmaself said:
No sorry when walking around.
Ah! It could work, but of course consulting an Apple Watch is still advertising that you've got an iPhone in your pocket as well!Voice direction prompts to a bluetooth headset? Bit geeky, but stops all the peering at your wrist.
Blown2CV said:
phones etc get the time from the mobile network not the GPS.
iphone gets time from GPS. I can prove this, cos I have lab GPS synthesiser here, which can place you anywhere in the world at any time in the past. Get it to transmit center of madrid for last thursday, and your iphone will move back in time.Digitalize said:
GPS works inside, so no.
It depends on which aircraft it is. On some aircraft your phone might pick up a GPS signal by a window, on others it won't. Often in your house or in a building, your phone is using assisted GPs inside your house which involves triangulation and phone networks etc,
Gassing Station | Watches | Top of Page | What's New | My Stuff