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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 (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 devices (such as mobile phones and laptops).

  3. Universal integrated circuit card - Wikipedia

    en.wikipedia.org/wiki/Universal_integrated...

    A card with all 3 features is called a removable user identity card, or R-UIM. Thus, the R-UIM card can be inserted into CDMA, GSM, or UMTS handsets, and will work in all three cases. In 3G networks, it is a mistake to speak of a USIM, CSIM, or SIM card, as all three are applications running on a UICC card.

  4. Data card - Wikipedia

    en.wikipedia.org/wiki/Data_card

    The standard ISO/IEC 7816 also regulates data exchange protocols and some aspects of work with other smart card data. [1] [2] Such cards are used for holder authorization for reception of certain services, such as bank account access for payments realization, use of prepaid mobile services, etc. The most widespread contact smart cards are SIM ...

  5. Smart card - Wikipedia

    en.wikipedia.org/wiki/Smart_card

    Illustration of smart-card structure and packaging 4 by 4 mm silicon chip in a SIM card, which was peeled open. Note the thin gold bonding wires and the regular, rectangular digital-memory areas. A smart-card pinout. VCC: Power supply. RST: Reset signal, used to reset the card's communications.

  6. eUICC - Wikipedia

    en.wikipedia.org/wiki/EUICC

    eUICC can refer to any implementation or application of the eUICC standards in an eSIM device. Each implementation of eUICC includes software code, a processor to emulate the software, non-volatile memory used to store the unique identifiers and cryptographic keys that are part of a SIM profile, and a bus interface to communicate the SIM profile to the mobile device. eUICC standards specify ...

  7. UMTS - Wikipedia

    en.wikipedia.org/wiki/UMTS

    Handsets can store their data on their own memory or on the (U)SIM card (which is usually more limited in its phone book contact information). A (U)SIM can be moved to another UMTS or GSM phone, and the phone will take on the user details of the (U)SIM, meaning it is the (U)SIM (not the phone) which determines the phone number of the phone and ...

  8. The best flip phones for seniors in 2025 - AOL

    www.aol.com/lifestyle/best-flip-phones-184204157...

    Service is provided by a SpeedTalk Mobile SIM card that's included in the package. The carrier uses T-Mobile's network for calls and text messages but has plans starting at just $5 per month.

  9. Data storage - Wikipedia

    en.wikipedia.org/wiki/Data_storage

    Data storage is the recording (storing) of information in a storage medium. Handwriting , phonographic recording, magnetic tape , and optical discs are all examples of storage media. Biological molecules such as RNA and DNA are considered by some as data storage.

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