iPhone 6 GPS problem on Pokemon Go Recently when I'm playing Pokemon Go I get a message saying I don't have a GPS signal. Some people told me it could happen because the battery is pushing on the GPS component in the iPhone 6 model. 

Is this a known problem? Do I need to replace the battery?
Make sure you have wi-fi switched on if you don't already. It doesn't need to be connected to an access point.

For some reason I get the GPS error even with a good GPS fix if I have my wi-fi switched off.