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  2. SIM box - Wikipedia

    en.wikipedia.org/wiki/Sim_box

    A SIM box (also called a SIM bank) is device used as part of a VoIP gateway installation. It contains a number of SIM cards, which are linked to the gateway but housed and stored separately from it. A SIM box can have SIM cards of different mobile operators installed, permitting it to operate with several GSM gateways located in different places.

  3. MobiFone - Wikipedia

    en.wikipedia.org/wiki/MobiFone

    MobiFone held a market share of 22.52% in 2023. Its main competitors included Viettel with 57.6%, VinaPhone with 17.49%, and Vietnamobile with 1.75%. MobiFone, along with VinaPhone and Viettel, the three large state-owned providers, held a combined market share of almost 98%. [2]

  4. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).

  5. Mobile virtual network operator - Wikipedia

    en.wikipedia.org/wiki/Mobile_virtual_network...

    An MVNO enters into a business agreement with a mobile network operator (MNO) to obtain bulk access to network services at wholesale rates, then sets retail prices independently. [1] An MVNO may use its own customer service, billing support systems, marketing, and sales personnel, or it could employ the services of a mobile virtual network ...

  6. eSIM - Wikipedia

    en.wikipedia.org/wiki/ESIM

    An eSIM (embedded SIM) is a form of SIM card that is embedded directly into a device as software installed onto a eUICC chip. First released in March 2016, eSIM is a global specification by the GSMA that enables remote SIM provisioning ; end-users can change mobile network operators without the need to physically swap a SIM from the device.

  7. Network switching subsystem - Wikipedia

    en.wikipedia.org/wiki/Network_switching_subsystem

    The action of a user of moving from one LA to another is followed by the HLR with a Location area update procedure. Send the subscriber data to a VLR or SGSN when a subscriber first roams there. Broker between the G-MSC or SMSC and the subscriber's current VLR in order to allow incoming calls or text messages to be delivered [ broken anchor ] .

  8. International mobile subscriber identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The international mobile subscriber identity (IMSI; / ˈ ɪ m z iː /) is a number that uniquely identifies every user of a cellular network. [1] It is stored as a 64-bit field and is sent by the mobile device to the network.

  9. Lucky Mobile - Wikipedia

    en.wikipedia.org/wiki/Lucky_Mobile

    After being announced on December 1, 2017, Lucky Mobile launched on December 4. [3] At launch, the network is available for users in 17 metro areas in Canada. The launch was viewed as a way for BCE to compete with the discount mobile brands Chatr and Public Mobile operated by its competitors Rogers Communications and Telus, respectively. [2]