Hi Eugene
Thanks for that, I didn't realise it turned the GPS off as well.
I also noticed in the discussion it's not much good without the data.
"Airplane Mode shuts down all radios in the iPhone. While it's true
that the GPS radio is a receiver only, it's also true that there is
not much utility to the GPS without a data connection to download the
maps on which your location is plotted. Furthermore, Location Services
uses assisted GPS (aGPS), which uses data from assistance server on
the cellular network to speed up localization and compensate if too
few satellites are in view.
Granted, the GPS receiver does function without the assistance part,
and there are apps that store your path, readout your lat/long/alt, etc.
So, I suspect part of the rationale is that even though the GPS radio
is a receiver and does not transmit, it's functionality is pretty
crippled without a data connection, so it might as well be shut off."
Also good to see from your use of Sygic it does not use much data.
cheers
Pedro
On 11/09/2009, at 5:29 PM, Eugene wrote:
Hi Pedro,
aeroplane mode shuts down the GPS. See discussion here:
<http://discussions.apple.com/thread.jspa?threadID=1788268>
I used my iPhone as a GPS for navigating in Melbourne every day for
a week. I only have a 5Mb free allowance with my plan and used only
a very small part of it.
My guess is the iPhone does use telephone towers to initially
determine its position by triangulation as it is fairly quick but
not accurate.
Once the satellites are located, they kick in and are much more
accurate.
Regards,
Eugene
On 11/09/2009, at 4:57 PM, Pedro wrote:
Hi Eugene and Walter
I'm happy to be proved wrong because I think these apps are great.
Could you please turn your airplane mode on and see if they still
work
cheers
Pedro
On 11/09/2009, at 4:41 PM, F.W. Hänel wrote:
it gets the signal from the satellites - not from the mob/phone
towers, maybe Pedro is getting confused with the Maps application.
Cheers,
Walter
On 11/09/2009, at 4:28 , Eugene wrote:
Pedro, I have to disagree with you on this one. I don't have the
TomTom but do use the Sygic alternative. It, like the TomTom,
uses the internal GPS and has proved very accurate. It doesn't
use downloaded information from cell towers.
As for the voice navigation. The Sygic uses voice direction but
does not have a synthesiser to actually pronounce the street
names. I think the TomTom is the same.
Regards,
Eugene
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On 11/09/2009, at 4:08 PM, Pedro wrote:
Hi Genevieve
Thank you, I have had a FANTASTIC day
Yes there is voice control on the TomTom for iPhone (quite a few)
http://iphone.tomtom.com/en-us/guided-tour.html
I would think twice though before shelling out for a nav app for
the iPhone. The GPS part of the phone does not work very well
and will have to rely
on cell towers for its information. So unless you have a large
(and cheap) data allowance you would be better of with a stand
alone GPS unit.
One saving grace for the TomTom is the car kit, which hasn't
been releases yet, will have a extra GPS chip to help out.
If anyone on the list has a new GPS app I would ask they try it
out with the phone in airplane mode to see if it works
regards
Pedro
On 11/09/2009, at 12:50 PM, Genevieve Armson wrote:
Does the tom tom app for iphone come with voice or is it just
the onscreen directions?
Have a FANTASTIC day!
Genevieve
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