使用手机往往会遇到各种各样的密码,其中有些密码不能轻易改变,必须到电信部门去修改。目前在手机中常用的密码主要有以下几类。PIN码也称个人识别码,为防止GSM手机被盗用,每张SIM卡上都存在一个PIN码,手机出厂时初始密码为1234,用户购机后可以将其改为自己容易记忆 Mobile phones often encounter a variety of passwords, some of which can not easily change the password, you must go to the telecommunications sector to modify. Currently used in the phone password mainly in the following categories. PIN code, also known as personal identification number, in order to prevent GSM mobile phone theft, there is a PIN code on each SIM card, the initial password when the phone is shipped to the factory for 1234, the user purchase can be changed to their own easy to remember