2-3m accuracy is "typical" for cell phones. It's definitely not the best precision offered by GPS though. GPS receivers can listen to two frequencies, which all

2-3m accuracy is "typical" for cell phones. It's definitely not the best precision offered by GPS though. GPS receivers can listen to two frequencies, which allows for on-device correction for ionospheric error (this requires more hardware and processing, so it's not generally done on consumer grade hardware).