Does the iPhone 4 access the 24 satellites placed into orbit by the U.S ?

I want to know the answer to this question, as I am considering several options to use OS !:25K maps like Viewranger for walking in the UK countryside.
The options I am considering are:
     1. Satmap
     2. Garmin Montana
     3. Memory Map Adventurer 3500
     4. An android phone such as HTC Desire with ViewRanger map app system
     5. iPhone with ViewRanger map app system
(The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS works in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS.)
This is the system that Garmin accesses.
I know you have to have line of sight with several satellites to get a fix
I need very acurate and fast fixes of position, even though walking, one doesn't want to be hanging around to get a fix for any length of time.
Battery life and waterproofing are also to be considered, as the unit would be switched on all day.
I have Viewranger maps on my iPod Touch which doesn't have GPS technology inside. So I could transfer my App and maps to an iPhone or an android phone.
Apple do not seem to make it clear if they use the above mentioned system. If they have, then I apologise.
I would be interested to hear from any UK walkers that use the iPhone with 1:25K mapping, and how they get on with it?
Thank you, in advance for your replies

Julian,
I haven't decided, yet, which way to go.
Lawrence
I have an iPod Touch and invested in the ViewRanger mapping system for it believing it had a gps system built in.
It appears to have, as it has logo that tries to aquire satellites in the top left hand corner. But it doesn't work and after much digging I finally found, on the forum, that there is no active software in the Touch.
So I have viewRanger map system that I could transfer to any phone with gps, including Apple.
The other option is to cut my losses on the ViewRanger system and go for a dedicated gps unit that meets my needs. And this is the way I am leaning to as no one has yet convinced me to do otherwise.
The problem with Memory-Map is it is PC dependant, The maps are supplied on CDs for download from a PC to the units SD card. No maps are supplied on SD cards!!!
And although I have an Intel Mac which can riun Windows, this system involves a lot of messing around. There is no proper Mac support.
So Garmin is the front runner, with all maps available on SD cards, and with the new models due out this month, with 48 satelite and a claimed 20% faster aquisition. Acuracy should also be improved. And Garmin is Mac friendly!!
I'm not knocking iPhone
But, as you say it is a jack of all trades and master of none.
I have a Touch which I use as a PIM, and a very good one it is too.
I use Nikon cameras for photography.
And a Blackberry phone
Ive been using Mac computers sind early 80's, and would never go back to PC.
Horses for courses.
And Apple isn't as acurate as Garmin, etc. I've seen reports that the positioning can sometimes be out by 100,s of metres
I haven't seen any claims by Apple on the acuracy of their gps.

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Now Chatting with Kaeleb
Hi, welcome to the US Apple Online Store. How are you?
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I haven't heard from you for a few moments. Would you like to continue chatting?
your not giving me useful answers
I am giving you accurate information
Wether its useful or not, the information your looking for comes from Sprint.
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your the company that designs and manufactures thephone
Your not getting it. As you said, we make the phone.
With an Antenna
The type of network* is determined by the service provider.
because prior to ever speaking with sprint one of your apple representatives gave me information contradicting that
4G, 4GLTE etc, all made up by the carriers to determine their networks.
what im asking is: is the iphone 5 made to be compatible with 4g wimaxx
whether or not sprint allows it to be
I get what your asking but your not quite understanding the answer. The iPhone is made compatible to connect to cellular network. Apple does not have information regarding which network types it will connect to, its designed to work on a GSM or CDMA network, the network strength which is 4G etc, is determined by the carrier. Here at Apple we have nothing to do with that.
We don't make iPhones designed specifically for 4G, 4G LTE, 4g wimaxx or any other network. Its made to run on a GSM or CDMA type network.
you manufacture 3 different iPhone that have specific antennas radio frquencies based on which carrier its going to be activated on
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Thats not true
We manufacture 2 types as I told you
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Sprint and Verizon are both CDMA
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both cdma but different
like the differnence between wimaxx and lte
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one moment and i will
I am a sales chat and here to assist customers with the online store, I am not going to be able to leave this chat open for you to contact technical support.
i already spoke to them
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they weren't able to give me an answer and aid to look online
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thats from your site
you asked me to show you thats what i did
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i have been nothing but professional
i am a customer
i own a macbook air and mac mini
as well as 4th gen ipod touch and an old iphone 3gs
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and this is how youre going to treat me?
I have helped you to the best of my ability, your in the wrong department
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well you helped me as much as your so called technical support that youre trying to refer me to. even though i already stated they werent able to help me
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thats who i spoke to at 10:03
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