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  • Mohammady de zalan sow from St. joseph catholic school asked on 14th September 2017
    Student

    student

    liberia, city greenville
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  • Nada Abd Elazem Ali from no institute selected asked on 10th September 2017
    Student

    انا الفيديوهات مش شغاله اعمل ايه ؟

    انا الفيديوهات مش شغاله اعمل ايه ؟
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  • Usha Chordiya from Pune Univ asked on 3rd December 2012
    Student

    shape of SIM

    Why does all cellular networks have same shape of SIM? Why is it designed in such a particular shape? Does it have any other shape? 
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    • ryan campbell from no institute selected
      answered on 18th March 2014
      Student

      I believe the form factor of the SIM was agreed upon by the GSM Alliance. CDMA networks however do not use a SIM card, but instead use an IMEI/MEID hard coded into the cellular radio module. New radio modules are beginning to offer software SIMs, but an interchangeable hardware SIM card allowed the user to change csrriers/phones by simply changing SIMs.

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Electronics & Communication Engineering Advanced 3G and 4G Wireless Mobile Communications
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