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  2. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

  3. Galaxy Nexus - Wikipedia

    en.wikipedia.org/wiki/Galaxy_Nexus

    The Canadian model was sold unlocked and supports GSM/UMTS/HSPA/AWS bands. A GSM/UMTS, SIM-unlocked version was officially released in the United States by Google in the Google Play Store. Sprint Corporation officially announced the Galaxy Nexus for their network at CES 2012, and was released on 22 April 2012, as one of Sprint Corporation 's ...

  4. Type Allocation Code - Wikipedia

    en.wikipedia.org/wiki/Type_Allocation_Code

    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.

  5. Samsung Galaxy J7 - Wikipedia

    en.wikipedia.org/wiki/Samsung_Galaxy_J7

    Samsung Galaxy J7 is a mid range Android smartphone produced by Samsung Electronics in 2015. [1] [2] In Latin America, Galaxy J7 (SM-J700M) was being sold alongside the Galaxy S5 Neo (SM-G903M), which shares same Exynos 7580 Octa SoC. [citation needed] The J7+ was announced in 2017, [3] followed by the J7 Pro and J7 Max in 2018. [4]

  6. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    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. GSM is also a trade mark owned by the GSM Association. [2] "

  7. Dual SIM - Wikipedia

    en.wikipedia.org/wiki/Dual_SIM

    Dual SIM phones are mainstream in many countries where phones are normally sold unlocked. Dual SIMs are popular for separating personal and business calls, in locations where lower prices apply to calls between clients of the same provider, where a single network may lack comprehensive coverage, and for travel across national and regional borders.

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