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A Central Equipment Identity Register (CEIR) is a database of mobile equipment identifiers (IMEI – for networks of GSM standard, MEID – for networks of CDMA standard). Such an identifier is assigned to each SIM slot of the mobile device.
The "Reporting Body Identifier" is also known as the Regional Code in the CDMA context. The International Mobile Station Equipment Identity and Mobile Equipment Identifier (MEID) structures are superficially the same, except that the first two digits must be decimal for an IMEI, and must be hexadecimal for an MEID.
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.
TIA also allocates IMEI codes, specifically destined for dual-technology phones, out of the RR=99 range. This range is commonly (but not exclusively) used for LTE-capable handsets with CDMA support. Other administrators working under GSMA may also allocate any IMEI for use in dual-technology phones.
However, a phone's IMEI may be easy to change with special tools. [10] [better source needed] In addition, IMEI is an un-authenticated mobile identifier (as opposed to IMSI, which is routinely authenticated by home and serving mobile networks.) Using a spoofed IMEI can thwart some efforts to track handsets, or target handsets for lawful intercept.
The old Tigo logo present between 2007–2010 Celltel was founded on 18 June 1989 on a Motorola TACS system, becoming the first cellular network in Sri Lanka and 36th operator in world. [ 5 ] It was then re-branded by Millicom International in January 2007, as Tigo (Sri Lanka). then it was acquired by Etisalat.
Yas (Formally Tigo) is a telecommunication company in Tanzania.. With over 13.5 million registered subscribers to its network, Yas directly and indirectly employs over 300,000 Tanzanians, including an extended network of customer service representatives, mobile money merchants, sales agents, and distributors.
Country Operator ƒ (MHz) B VoLTE Launch date Notes Anguilla Digicel: 700 12 / 17 Jun 2018: 10 MHz [1] [2]: FLOW: 700 13 Nov 2015: 10 MHz [3] [4] Antigua and Barbuda Digicel: 700 b c 12 / 17