If you’re experiencing location accuracy issues you believe are related to your GPS, please use the steps below to troubleshoot.

GPS accuracy largely depends on the device you're using. You can find a list of supported devices here. 

Many tablets, including those without built-in data network connectivity (3G or 4G), do not contain built-in GPS sensors. In areas or at events with busy or congested mobile data networks, tablets may not maintain a strong enough GPS signal to play Pokémon GO.

Ensure you have a strong internet connection, either via a cellular or Wi-Fi. However, please be aware that strong Wi-Fi signal or cellular data (i.e. having full bars) isn't always sufficient to guarantee a stable connection. Both may slow down during periods of heavy usage, and you also may experience an unstable connection while traveling in a moving vehicle. 

If possible, try switching between Wi-Fi and cellular data, to see if your GPS accuracy improves.

When playing in urban areas with lots of tall buildings, keep in mind that your GPS may drift or jump.

If you’re playing on an Android device, enable the Improve Location Accuracy setting. This allows your device to use the information other than GPS (such as data from internal sensors) to determine your location. 

If you are receiving the "failed to detect location" error, there may be a setting called “mock locations” that is preventing you from playing Pokémon GO. To turn off this setting, visit Settings > System > Advanced > Developer options and make sure that "Select mock location app" is disabled.