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  2. Wireless device radiation and health - Wikipedia

    en.wikipedia.org/wiki/Wireless_device_radiation...

    Use hands-free to decrease the radiation to the head. Keep the mobile phone away from the body. Do not use telephone in a car without an external antenna. The use of "hands-free" was not recommended by the British Consumers' Association in a statement in November 2000, as they believed that exposure was increased. [63]

  3. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The phone identifies the subscriber by transmitting the International mobile subscriber identity (IMSI) number, which is stored on a SIM card that can, in theory, be transferred to any handset. However, the network's ability to know a subscriber's current, individual device enables many network and security features.

  4. 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).

  5. Mobile phone - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone

    A hybrid mobile phone can hold up to four SIM cards, with a phone having a different device identifier for each SIM Card. SIM and R-UIM cards may be mixed together to allow both GSM and CDMA networks to be accessed. From 2010 onwards, such phones became popular in emerging markets, [37] and this was attributed to the desire to obtain the lowest ...

  6. Where Would Apple Be Without the iPhone and iPad? - AOL

    www.aol.com/2012/04/12/where-would-apple-be...

    Seems a lot of people have been playing mind games with Apple (NAS: AAPL) of late -- the type of games that involve fantastical what-ifs and dreams of what could have been. Some analysts on the ...

  7. eSIM - Wikipedia

    en.wikipedia.org/wiki/ESIM

    An eSIM (embedded SIM) is a form of SIM card that is embedded directly into a device as software installed onto a eUICC chip. First released in March 2016, eSIM is a global specification by the GSMA that enables remote SIM provisioning; end-users can change mobile network operators without the need to physically swap a SIM from the device.

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