1. A computerized-method of a communication device for managing an electronic phone book, the communication device comprising a universal subscriber identity module (USIM) the method comprising steps: saving the electronic phone book information loaded from the USIM into a storage device of the communication device, wherein the USIM comprises a plurality of elementary files, and the elementary files comprise an elementary file phone book reference (EFPBR), a plurality of elementary file abbreviated dialing numbers (EFADN) files, a plurality of elementary file email (EFEMAIL), and a plurality of elementary file index administration pointer (EFIAP), wherein the EFPBR comprise a plurality of electronic phone book records, a plurality of name and phone number tags, a plurality of email tags, and a plurality of index tags, wherein the EFADN comprise a plurality of name and phone number records, wherein the EFEMAIL comprise a plurality of email records, wherein the EFIAP comprise a plurality of index records; receiving updated email information of contacts in the electronic phone book; determining a record number of the name and phone number record of the EFADN of the contact of the updated email information, and determining a file identifier (file ID) of the EFADN; determining a record number of the electronic phone book record of the EFPBR corresponding to the EFADN according to the file ID of the EFADN; determining a file ID of the EFEMAIL corresponding to the electronic phone book record according to the email tag corresponding to the electronic phone book record and a determined record number of the electronic phone book record; updating email information of the email record of the EFEMAIL corresponding to a determined name and phone number record according to the updated email information when determining a email type of the EFEMAIL for a first type according to the email type included in the electronic phone book record of the EFPBR, wherein the first type expresses that a number of the email records of the EFEMAIL is equal to a number of the name and phone number records of the EFADN; and linking an updated email record of the EFEMAIL with the name and phone number record of the EFADN.