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2. Universal integrated circuit card - Wikipedia

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

   The universal integrated circuit card (UICC) is the physical smart card (integrated circuit card) used in mobile terminals in 2G , 3G , 4G , and 5G networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes.

3. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   4G: OFDMA: LTE: Digital: 2009 Worldwide SIM card: None Smaller cells and lower coverage on the S band. Very low density Hard No (data only) Voice possible through VoLTE or fallback to 2G/3G 5G: OFDMA: NR: Digital: 2018 Limited SIM card: None Dense cells on millimeter waves. Very low density Hard No (data only) Voice possible through VoNR

4. 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).

5. Vodafone's first own-brand 4G phones could struggle to compete

   www.aol.com/news/2014-07-24-vodafone-own-brand...

   Last year we would've bet our lunch money on Vodafone being the first UK carrier to release an own-brand LTE smartphone. After all, we spotted a "Vodafone Smart 4G" picking up its roaming permit ...

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

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

   Yes, 2G speeds, after up to 14 GB 4G LTE data [575] Yes Yes, but unclear if tethering continues to function after 4G data is depleted [575] Yes, with Extras Pack: int'l calling, and roaming in Canada, the Dominican Republic, and Mexico only [577] Yes [100] Owned by TracFone Wireless. Acquired from T-Mobile.

7. SIM Application Toolkit - Wikipedia

   en.wikipedia.org/wiki/SIM_Application_Toolkit

   SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...

8. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   BlackBerry phones sold by Turkcell and Vodafone were SIM locked, however, could be unlocked on request without any conditions. [65] Yet, the SIM locking practice was only confined to phones sold by operators and it is not clear if operators enforced SIM locking on the phones sold by them tightly or not and if the practice was widespread.

9. List of mobile virtual network operators in the United Kingdom

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

   Vodafone: 15 December 2016 [38] Ceased operations. LIFE Mobile: EE: 29 November 2016 [39] Acquired by Plusnet. Mobile by Sainsbury's: Vodafone: 15 January 2016 [40] Ceased operations. Our Telecom EE: 16 August 2016 [41] Dissolved. Ovivo Mobile: Vodafone: 19 March 2014 [42] Ceased operations. PG Mobile Three: 2016 [43] Ceased operations. Plusnet ...