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2. 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).

3. Mobile phone feature - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone_feature

   A hybrid mobile phone can take more than one SIM card, even of different types. The SIM and RUIM cards can be mixed together, and some phones also support three or four SIMs. [15] [16] From 2010 onwards they became popular in India and Indonesia and other emerging markets, [17] attributed to the desire to obtain the lowest on-net calling rate.

4. Samsung Galaxy Duos - Wikipedia

   en.wikipedia.org/wiki/Samsung_Galaxy_Duos

   In their marketing materials, Samsung uses the term "Dual SIM Always On” [3] to describe the Duos phones, although both SIM cards are not always on. All phones with this feature are regular, Dual SIM Stand-by (DSS) phones, with 1 transceiver (radio). The second SIM is always disconnected when a call is in progress on SIM 1 and vice versa. The ...

5. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   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.

6. Mobile phone - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone

   The SIM securely stores the service-subscriber key (IMSI) and the K i used to identify and authenticate the user of the mobile phone. The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device, provided that this is not prevented by a ...

7. 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.