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Many cell phones do not have any magnets inside, and are completely unaffected when normal magnets are placed near them.

However, magnets are used with other cell phones in a variety of ways.

Many folding or sliding cell phones have magnets inside to hold them closed in a way that is easy to open.

The speaker in the cell phone may be the kind of speaker that has a small magnet inside.

As far as I know, the microphone on all cell phones is of the "electret" type that does not include any batteries; cell phones don't use the other kinds of microphones that include batteries.

Many cell phones have a small motor inside that is used when the cell phone is set to "vibrate". That motor typically has a permanent magnet inside.

Some cell phones, when an external magnet is placed in the middle, turn off the screen and go into a low-power state and ignore button presses. They are designed to do this so that when they are placed in a cell phone holster (most of which have a small magnet to hold them shut) and then the buttons are accidentally bumped, they don't accidentally do something that would drain the battery.

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∙ 15y ago

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