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The manufacturer for each new device model gets at least one TAC (Type Allocation Code) allocated by GSMA, consisting of 8 digits, to which he can add a 6-digit serial number to obtain the IMEI. Thus, with one TAC, a manufacturer can release up to 1 million devices with a unique IMEI.
Therefore, all references to the last three or six digits of an IMEI refer to the actual IMEI number, to which the check digit does not belong. The check digit is validated in three steps: Starting from the right, double every other digit (e.g., 7 → 14). Sum the digits (e.g., 14 → 1 + 4). Check if the sum is divisible by 10.
The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices.. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network.
A mobile equipment identifier (MEID) is a globally unique number identifying a physical piece of CDMA2000 mobile station equipment. The number format is defined by the 3GPP2 report S.R0048 but in practical terms, it can be seen as an IMEI but with hexadecimal digits.
ESNs are currently mainly used with CDMA phones (and were previously used by AMPS and TDMA phones), compared to International Mobile Equipment Identity (IMEI) numbers used by all GSM phones. [ 1 ] The first eight bits of the ESN were originally the manufacturer code, leaving 24 bits for the manufacturer to assign up to 16,777,215 codes to mobiles.
For example, an iPhone 6 was designed to be capable of supporting LTE FDD, LTE TD, CDMA, and WCDMA technologies but China Mobile reached a deal with Apple to create a special model for China Mobile in addition to the off-contract retail model sold by Apple and third party vendors with the capability to support LTE FDD, CDMA, WCDMA, which are ...
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Logo used until 2015. Samsung Galaxy (Korean: 삼성 갤럭시; stylized as SΛMSUNG Galaxy since 2015 (except Japan where it omitted the Samsung branding up until 2023), [2] previously stylized as Samsung GALAXY; abbreviated as SG) is a series of computing, Android mobile computing and wearable devices that are designed, manufactured and marketed by Samsung Electronics since 29 June 2009.