Accessory Magnetic phone holder for car

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http://androidforums.com – Hello. Im looking for a magnetic phone mount/holder for my car but i have some concerns about using the magnets on an s3 (or any phone). Can the use of magnets damage the phone in any way? Also, I have read that it can interfere with the gps signal. Any one had any issue or know if it would make the gps malfunction? What about nfc? I want to use a nfc sticker for BT and other settings next to the place where i would put the phone and the phone mount but im not sure if it would interfere with that, or even bluetooth signal. Is there any magnetic phone mount you would recommend? I saw these on e (General)