Unhappy Very serious gps problem after software update

Two days ago i got a software update notification and i accepted and downloaded it installed then i got a new lock screen and the big change is i never got a gps lock in my position even after one hour also. before update i got position lock in seconds now i'm never got a lock so please suggest any ideas how i get my gps back please if you guys know any idea please tell me thank u or u guys have any idea how to disable last update pls answer me guys