SIM 808 gps lat & long data inaccurate

So i was using the sample example code for extracting the gps data on DFRobot Sim 808 library and i notice that the coordinates shown on the serial monitor were inaccurate and doesn't really show my same exact location. and i was searching for the net for some answers i noticed that there are people who have the same problem as me. i was wondering if someone has the edited file of the .cpp file of dfrobot in acquiring the accurate gps data.

Thanks in advance