Re: MobilTracker (gps app)
Contact the developer is the next step. I don't think being familiar with the app matters here. You've done what you can do ... You accepted the developer's required permissions, you've tried a hard reset, other apps that use the GPS work ok ... The only other thing to try is perhaps a security wipe or full wipe and start over, or try different OS version, but I would see what the developer says first. Chances are you'll get a reply before someone here comes along running the same OS as you on the same model and can say either way whether the app works for them.
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