| 摘要 |
A portable cellular phone is provided which is capable of surely detecting a state of folding of phone bodies by detection of a weak magnetic field produced by a receiver. A first phone body has a Hall integrated circuit (IC) adapted to detect a magnetic flux formed by a receiver. When the first phone body and a second phone body are folded closed, a magnetic flux density of the magnetic flux that is formed by the receiver and passes through the Hall IC is changed by a magnetic material placed in the second phone body.
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