Pokemon go wont run on celluar data

[AC Question]

Well, I got Lenovo phone yesterday. My cellular data works fine with any other app, but not with Pokemon go, which also runs perfectly on wifi. I've tried reinstalling the game, restarting the phone, nothing work, the game just gives me GPS signal not found error. I've been told to do math in app management, but I couldn't find it on Lenovo, old help