I don't know but I do find often that moving in the garden seems to effect
its detection of north, so I'm guessing its actually quite slow at detecting
things.
Brian

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The Sofa of Brian Gaff...

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"Harry Bloomfield" wrote in message
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I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet close
to my SE doesn't seem to affect it at all. What am I missing?