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2. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   A typical SIM card (mini-SIM with micro-SIM cutout) T-Mobile nano-SIM card with NFC capabilities in the SIM tray of an iPhone 6s cell phone A SIM (Subscriber Identity Module) card 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 ...

3. Comparison of mobile phone standards - Wikipedia

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

   UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals. In reality, only one person is actually using the channel at a specific moment.

4. Motorola StarTAC - Wikipedia

   en.wikipedia.org/wiki/Motorola_StarTAC

   However, all other models are fully compatible with modern SIM cards. With the exception of the 130 which takes a 2FF mini-SIM, GSM StarTACS accept a standard (1FF) SIM card. This format follows the same dimensions as a conventional debit/credit card and was the format used in the first GSM phones before the switch to the 2FF standard.

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. 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.

7. 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 ...