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  2. Apple SIM - Wikipedia

    en.wikipedia.org/wiki/Apple_SIM

    However, activating mobile services on AT&T will permanently lock the Apple SIM to AT&T, requiring the purchase of a new Apple SIM in order to use a different carrier. [4] The Apple SIM is known as a Removable SIM with Remote Provisioning [5] – it is a special SIM card that may be configured with different operator profiles. This is in ...

  3. 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).

  4. 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.

  5. List of mobile network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_network...

    Four of the top five wireless providers have all standardized on 4G LTE and 5G NR as their wireless communication standards, whereas Boost Mobile uses only 5G NR.Of which, LTE has been deployed across their entire coverage area; however, the LTE bands used by each provider remain largely incompatible.

  6. iPhone XR - Wikipedia

    en.wikipedia.org/wiki/IPhone_XR

    The iPhone XR was available in six colors: black, white, blue, yellow, coral (a shade of pink and orange), and Product Red. It is the second iPhone to be released in white, yellow and blue, the first being the iPhone 5c in 2013. [13] Internationally, the phone supports dual SIMs through a Nano-SIM and an eSIM.

  7. List of mobile virtual network operators in the United States ...

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Most of the MVNOs in this table provide voice, text, and data services to mobile phones ("Yes" in Phone service column; note that this column does not indicate whether the provider sells phones – all providers offering phone service sell phones unless the "BYOD" column contains "Yes, BYOD-only").

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