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  2. SD card - Wikipedia

    en.wikipedia.org/wiki/SD_card

    Unlocked and locked SD cards Sony 64 GB SF-M Tough Series UHS-II SDXC Memory Card is one of the few cards in the market without a sliding tab on the write protect notch. Most full-size SD cards have a "mechanical write protect switch" allowing the user to advise the host computer that the user wants the device to be treated as read-only.

  3. Memory card reader - Wikipedia

    en.wikipedia.org/wiki/Memory_card_reader

    The number of compatible memory cards varies from reader to reader and can include more than 20 different types. The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being a figure of merit indicating the number of memory cards accepted, such as 35-in-1. There are three categories of card ...

  4. List of NFC-enabled mobile devices - Wikipedia

    en.wikipedia.org/wiki/List_of_NFC-enabled_mobile...

    Windows Phone September 2012 Nokia Lumia 610 NFC version only Lumia 620: Windows Phone January 2013 all versions Lumia 720: Windows Phone April 2013 all versions Lumia 730: Windows Phone September 2014 all versions Lumia 735: Windows Phone September 2014 all versions Lumia 810: Windows Phone November 2012 all versions Lumia 820: Windows Phone ...

  5. Card reader - Wikipedia

    en.wikipedia.org/wiki/Card_reader

    A card reader is a data input device that reads data from a card-shaped storage medium and provides the data to a computer. Card readers can acquire data from a card via a number of methods, including: optical scanning of printed text or barcodes or holes on punched cards, electrical signals from connections made or interrupted by a card's punched holes or embedded circuitry, or electronic ...

  6. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    Mobile phones with non-removable rear cover typically house SIM and memory cards in a small tray on the handset's frame, ejected by inserting a needle tool into a pinhole. [242] Some earlier mid-range phones such as the 2011 Samsung Galaxy Fit and Ace have a sideways memory card slot on the frame covered by a cap that can be opened without tool ...

  7. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    Carphone Warehouse, one of the largest UK phone retailers, offers unlocked phones with most PAYG deals. [citation needed] As of January 1, 2014, all phones sold by 3 UK are unlocked. Phones bought before this date will be unlocked for free. [71] On 17 December 2019, Ofcom announced that it would explore a mandate banning SIM locking. [72]