4s ios8 gps working with wifi only

Discussion in 'iPhone Tips, Help and Troubleshooting' started by kar120c, Apr 13, 2015.

  1. kar120c, Apr 13, 2015
    Last edited: Apr 13, 2015

    kar120c macrumors member

    Joined:
    Oct 10, 2013
    #1
    After upgrading my 4S to IOS 8.XX I have a strange issue with gps and all localization services:
    sometimes is very difficult to obtain the position in the various apps and I noticed that the gps symbol is not visible in the upper right of the screen.
    If I turn on Wifi with or without any connection the gps symbol is always visible and the localization is almost instantaneus.
    Now with IOS 8.3 the phone works very well but the issue is still here.
    Anyone has noticed this?
     
  2. mKTank macrumors 68000

    mKTank

    Joined:
    Jul 2, 2010
    #2
    Well getting location through Wi-Fi is a ton easier than through GPS. Usually the phone will just use the Wi-Fi network's reported location (through its IP) which is pretty much instant. GPS takes a long ass time by itself to get a signal, and that's why it's AGPS in these phones; it uses the cell towers to triangulate your location vaguely and then GPS to narrow it down. If you have a weak signal to the cell towers then yeah it'll take a while because the phone has no idea where to look for satellites and the cell towers aren't helping.

    It brings me back to the old days of using my TomTom devices; they'd occasionally get updates called GPSInfo that contained a week or so's worth of data specifying where in the sky the satellites will be at any given point in time in that range. The updates were optional though, and if you didn't install them, it would still get a signal but would take up to a minute to do it. I imagine your phone's dealing with the same issue if for whatever reason the cell towers aren't doing their job.
     
  3. kar120c thread starter macrumors member

    Joined:
    Oct 10, 2013
    #3
    Yes, but my Iphone get location almost instantly with the wifi on but not connected with any network
     

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