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Thread: Does the iPhone's GPS really not need cell signal?

  1. #1
    Default Does the iPhone's GPS really not need cell signal?
    I ask this because I have recently returned from UK and my iPhone on roaming refused to let the Maps app work - and yes, I was under open, clear sky too.

    Any insights as to why it didn't work? Thanks in advance!

  2. #2
    iPhoneaholic sursture's Avatar
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    I had the same promlem...why? ...not sure.
    But I solved it by installing TomTom for iPhone.
    read more here:
    TomTom Announces iPhone Collaboration at WWDC | iPhone News Updated
    Last edited by Poseidon79; 2009-08-23 at 06:15 PM.
    Do hope that helps



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  3. #3
    Retired Moderator Poseidon79's Avatar
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    The Maps app uses your cellular data connection to download the map. Without it you will have a blank screen with a blue dot on it.

  4. #4
    the iphone has assisted GPS. that means that the gps works without a cellular signal whatsoever, but it will be slower.

    and like poseidon said, maps can't work without a connection because ... well ... where should the maps be coming from?

  5. #5
    Livin the iPhone Life
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    No cellular signal is required IF you have preloaded maps. IE: xGPS. In fact, you don't even need a SIM installed . It takes a bit longer to acquire your current location but it works

  6. #6
    Quote Originally Posted by Mes View Post
    No cellular signal is required IF you have preloaded maps. IE: xGPS. In fact, you don't even need a SIM installed . It takes a bit longer to acquire your current location but it works
    I think there is also an appstore application called "OfflineMaps" ... never tried it though

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