The present invention relates to a mobile phone, and more particularly, the exterior of the mobile phone can be selectively changed and used according to a user's preference, and the replaceable exterior has a space (memory) for storing information and storing applications. In addition, the present invention relates to a folding portable telephone capable of inputting, outputting, deleting, modifying, and executing information and applications according to a user's needs or preferences.;To this end, the present invention consists of a cover part 5 which is hinged to a body part 7 provided with a key input part, an LCD window 4, a battery 6 and an antenna 1, and opens and closes the body part 7. In the folding portable telephone, the locking button (2) is attached to the upper side of both sides of the cover portion 5 to operate the locking ring 10 of the upper part of the seating portion 11 to be described later, and the cover portion (5) A seating portion 11 is formed on the front of the stepped portion. Under the seat 11 there is a seat power supply terminal 8 and a seat information / application transmission / reception terminal 9. A locking groove 14 coupled to the locking ring 10 is formed at the upper rear side of the exterior cover 4, and a lower part of the seating part power supply terminal 8 and a seating part information and application of the seating part 11 are formed at the bottom of the outer cover 4. An external cover power receiving terminal 12 to which the program moving terminal 9 is bonded and an external cover information / application transmission / reception terminal 13 are formed to store information embedded in the external cover 4 and to store application programs. Is connected to a space (memory), the outer cover 4 is characterized in that it is configured to be easily removable to the seating portion 11 of the cover (5).
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