Originally posted by Rondec
Do you have a K-3 III? I haven't had issues using my phone with the K-3 III, but you probably have a different phone from me.
No, I do not sync to any camera as I own no cameras that can do that. So, it is not an option for me.
But as far as I have read, the problem is 99% the phone that turns off the app. But also, the connection between phone and camera can be lost. And of course, your phone have to be in your pocket when you take images. If the camera and the phone are some meters apart it will not work. And if your pocket see no satellites it will not work either.
Off course, if the phone has a system app that can share GPS, then the phone will not turn off the app. And maybe, if I get another phone then it will not turn off user apps.
As far as I understand, newer Nikon and Sony cameras has support for connection to smartphones. I do not know if Pentax cameras can do it except for K-3 III. I am not sure about Canon.