国际移动设备识别码(International Mobile Equipment Identity,IMEI),即通常所说的手机序列号、手机“串号”,用于在行动电话网络中识别每一部独立的手机等行动通讯装置,相当于行动电话的身份证。序列号共有15位数字,前6位(TAC)是型号核准号码,代表手机类型。接著2位(FAC)是最后装配号,代表产地。后6位(SNR)是串号,代表生产顺序号。最后1位(SP)一般为0,是检验码,备用。国际移动设备识别码一般贴于机身背面与外包装上,同时也存在于手机记忆体中,通过输入*#06#即可查询。
Your SIM serial number (SSN), sometimes called the ICC-ID (Integrated Circuit Card ID), is for international identification. The SNN typically has 19 digits and contains specific details about your operator, your location, and when it was made. The first two digits are the telecom ID, the second two digit refer to your country code, the third two digits are the network code, the next four digits are the month and year of manufacturing, the next two digits are the switch configuration code, the next six digits are the SIM number, and the last digit is the check digit.
The international mobile subscriber identity or IMSI /mzi/ is used to identify the user of a cellular network and is a unique identification associated with all cellular networks. It is stored as a 64 bit field and is sent by the phone to the network. It is also used for acquiring other details of the mobile in the home location register (HLR) or as locally copied in the visitor location register. To prevent eavesdroppers identifying and tracking the subscriber on the radio interface, the IMSI is sent as rarely as possible and a randomly generated TMSI is sent instead.
On Android 8.0 (API level 26) and higher versions of the platform, a 64-bit number (expressed as a hexadecimal string), unique to each combination of app-signing key, user, and device. Values of ANDROID_ID are scoped by signing key and user. The value may change if a factory reset is performed on the device or if an APK signing key changes. For more information about how the platform handles ANDROID_ID in Android 8.0 (API level 26) and higher, see Android 8.0
A hardware serial number, if available. Alphanumeric only, case-insensitive. For apps targeting SDK higher than Build.VERSION_CODES.O_MR1 this field is set to UNKNOWN.