Usually doesnt work
With 3 to 4 bars on my iPhone4, it usually either doesnt work, or else takes 30 seconds or longer to work. Accuracy has not been better than +/-600 ft. Very disappointing.
Markj57 about Altimeter GPS easy & fast
With 3 to 4 bars on my iPhone4, it usually either doesnt work, or else takes 30 seconds or longer to work. Accuracy has not been better than +/-600 ft. Very disappointing.
Markj57 about Altimeter GPS easy & fast