Examples of apps in this category include "Advanced Task Killer" and "Juice Defender." Please disable or adjust the settings of these apps to allow Strava to receive GPS information during long periods of background operation. Some devices may have apps installed that disable GPS services or terminate backgrounded apps in an attempt to reduce battery usage and improve system performance.Then go settings > privacy > location services > system services, setting time zone OFF.Once your phone has reset go to settings, privacy, location services, turn it off then on again.When you've done that go to settings, general, reset and choose reset network settings (you will need to re-enter your wifi passwords!).Then go into settings and turn on airplane mode.Swipe the screens of all apps upwards to close them. This will bring up tile-sized images of all currently running apps. Open Strava when you have a clear and unobstructed view of the sky and wait a few more minutes than normal before starting your activity even if you see a message that says 'GPS Signal Acquired.'.Ensure that your phone isn't connected to a WiFi network when you start your activity.Close all other open applications before recording and if you open another app during your activity, navigate back to Strava afterward.Steps to take when investigating GPS Issues on iOS devices Even with a perfectly clear sky, it can take a few minutes before a lock can be established in some situations. This allows the phone's GPS to get hints about its approximate location. To improve signal acquisition time, keep the device in one place and make sure the device's data communications are enabled. Time to tune in to the signals from the satellites.A big tree is an obvious obstacle, but even a pocket or a backpack can cause problems for the very low-strength signals. A clear view of a large portion of the sky. Any obstructions between the phone and the sky can adversely affect signal strength.To achieve fast startup and high-accuracy position estimates, you should provide:
GPS bounce: A 'jumpy' GPS track can cause your activity to report more distance than you actually traveled since each 'zig' and 'zag' of your GPS track has to be accounted for with a straight line connecting them.Lost GPS signal: If the GPS signal is lost and sometime later re-acquired the pre-and post-signal-loss points will be treated just like any other two points (although more time has elapsed between them) and connected with a straight line.You may see that the route generally follows the shape of the road but with much less precision. GPS drift: The GPS track deviates from the road.Please refer to the troubleshooting steps listed in this article to prevent similar issues in the future. Thankfully, there is more that can be done to prevent bad GPS data from being recorded than there is to repair it. If you experience any of the below, your activity may report a different distance than you actually traveled, and, unfortunately, it will not be possible for us to "fill in" the missing data or modify the existing data. The GPS system includes the chip in your iPhone device as well as the satellites above the Earth. GPS is a system to estimate location on Earth by using signals from a set of orbiting satellites.