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  2. Samsung Galaxy S10 - Wikipedia

    en.wikipedia.org/wiki/Samsung_Galaxy_S10

    The Galaxy S10 series is the tenth generation of the Galaxy S series, its flagship line of phones next to the Note models, which is also the 10th anniversary of the Samsung Galaxy line of smartphones. It is also the first flagship by Samsung since the Galaxy S5, Galaxy Note 4 and Galaxy Note Edge to use plastic, marking a departure from the ...

  3. Dual SIM - Wikipedia

    en.wikipedia.org/wiki/Dual_SIM

    A dual SIM tray as shown on a Redmi 13. This phone accepts either two nano SIMs or a nano SIM and a MicroSD card in place of the second SIM slot. Some telephones have a primary and a secondary SIM slot that support different generations of connectivity. For example, 4G and 3G primary, and 3G and 2G secondary, [29] or 5G and 5G, or 5G and 4G. [30]

  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. Samsung Galaxy S series - Wikipedia

    en.wikipedia.org/wiki/Samsung_Galaxy_S_series

    The Galaxy S6 is the first mobile phone in the Galaxy S series with a nano-SIM card; earlier Galaxy phones use a micro-SIM card or "standard" card. [ 47 ] [ 48 ] The S6 Edge Plus, being released simultaneously with the Galaxy Note 5 , is not equipped with an infrared transmitter for use as a remote control .

  6. 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.

  7. 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.