a magnetometer (or compass) sensor is a bit of hardware, so no update can fix that. I am not sure if your phone has one or not, can you check at
members app-> support (bottom right hand corner) -> diagnostics-> sensors
does it mentions there a magnetometer or compass then your phone has one and you just need to an app to use it, if it doesn't mention any of thesesensors you are out of luck, if it mentions that it is not working, contact support.
Good luck
