When you first get your iPhone, you might notice the calibration screen often. iOS builds calibration tables based on what it "learns" about its environment.
So each time you have to calibrate, you are helping the iPhone learn about what caused the interference.
Now, I've only seen this twice in my car. No other place! This is quite common though. And after I calibrated it twice, it doesn't get interference while in my car. Compass is dead on.
So each time you have to calibrate, you are helping the iPhone learn about what caused the interference.
Now, I've only seen this twice in my car. No other place! This is quite common though. And after I calibrated it twice, it doesn't get interference while in my car. Compass is dead on.