Pag gps not found ganito gawin mo go to settings >> Location/Location services >> i-on ang gps services/location services.
(pag may lumabas na mode na battery saving, high accuracy or device only.. Click mo yung high accuracy mode) after mo magawa yan try playing pokemon go na ulit.
Hope this helps.
Gumamit ka ng ibang browser. Try google chrome for mobile or try download manager.
Mgc, apn settings yun. Try mo mag search dito meron yan.