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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.
The check digit is not transmitted over the radio interface, nor is it stored in the EIR database at any point. 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:
It consists of three fields, including an 8-bit regional code (RR), a 24-bit manufacturer code, and a 24-bit manufacturer-assigned serial number. The check digit (CD) is not considered part of the MEID. The MEID was created to replace electronic serial numbers (ESNs), whose virgin form was exhausted in November 2008. [1]
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.
As ESNs have essentially run out, a new serial number format, MEID, was created by 3GPP2 and was first implemented by Verizon in 2006. MEIDs are 56 bits long, the same length as the IMEI and, in fact, MEID was created to be a superset of IMEI.
The Pixel Watch is a Wear OS smartwatch designed, developed, and marketed by Google as part of the Google Pixel product line. First previewed in May 2022 during the Google I/O keynote, it features a round dome-shaped display as well as deep integration with Fitbit , which Google acquired in 2021.
Google Pixel Watch: 2022-10-06 Wear OS 4.0 Samsung Exynos 9110 2 GB Yes 294 mAh $349.99 $399.99 (4G LTE) 5 ATM Pixel Watch 2: 2023-10-04 Wear OS 4.0 (Android 13) Qualcomm Snapdragon W5 Gen 1 2 GB Yes 306 mAh Round, 1.63 in (41 mm) $349.99 $399.99 (4G LTE) 5 ATM Pixel Watch 3: 2024-10-10 Wear OS 5.0 (Android 14) Qualcomm Snapdragon W5 Gen 1 2 GB Yes
Pixel 6 Pro Pixel 6a Pixel 7 Pixel 7 Pro Pixel 7a Pixel Fold Pixel 8 Pixel 8 Pro Pixel 9 Pixel 9 Pro Pixel 9 Pro XL Pixel 9 Pro Fold; Status [1] Supported Manufacturer Foxconn [2] Dixon [43] Foxconn [43] Codename Oriole: Raven Bluejay Panther: Cheetah Lynx Felix Shiba: Husky Tokay: Caiman: Komodo Comet Key dates Released October 2021 July 2022 ...