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The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as mobile phones and tablets.
Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.
Pouch case made to dangle A Samsung Galaxy S8 Active in a combined case and collapsible vertical stand S-View cover accessory of a Samsung Galaxy S4 - Horizontal flip cover with preview window Cases, which are designed to attach to, support, or otherwise hold a smartphone, are popular accessories.
The GSM iPhone 4 features a MicroSIM card that is located in a slot on the right side of the device. [78] The CDMA model of the iPhone 4, just the same as any other CDMA-only cell phone, does not use a SIM card or have a SIM card slot.
It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems. GSM networks use the IMEI number to identify valid devices ...
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.
The GSM Association (commonly referred to as 'the GSMA' or Global System for Mobile Communications, originally Groupe Spécial Mobile) is a non-profit [1] industry organisation that represents the interests of mobile network operators worldwide. More than 750 mobile operators are full GSMA members and a further 400 companies in the broader ...
G stand for GSM; K stand for Europe GSM/3G; M stand for Latin America; R stand for India; S stand for Korean Internal Market CDMA / Smartphone; T stand for Canada ...
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