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2. Unstructured Supplementary Service Data - Wikipedia

   en.wikipedia.org/wiki/Unstructured_Supplementary...

   USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network. [1] The service does not require a messaging app, and does not incur charges. [2] USSD messages are up to 182 alphanumeric characters long.

3. Prepaid mobile phone - Wikipedia

   en.wikipedia.org/wiki/Prepaid_mobile_phone

   Typical sign showing where top-ups can be made. A prepaid mobile device, also known as a pay-as-you-go (PAYG), pay-as-you-talk, pay and go, go-phone, prepay, or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use.

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. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

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

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

   Vodafone: 15 December 2016 [44] Ceased operations. LIFE Mobile: EE: 29 November 2016 [45] Acquired by Plusnet. Mobile by Sainsbury's: Vodafone: 15 January 2016 [46] Ceased operations. Our Telecom EE: 16 August 2016 [47] Dissolved. Ovivo Mobile: Vodafone: 19 March 2014 [48] Ceased operations. PG Mobile Three: 2016 [49] Ceased operations. Plusnet ...

7. Vodafone UK - Wikipedia

   en.wikipedia.org/wiki/Vodafone_UK

   Vodafone Limited, (stylised as vodafone), trading as Vodafone UK, is a British telecommunications company, owned by Vodafone Group, the world's eighth-largest telecommunications company. [3] Vodafone is the third-largest mobile network operator in the United Kingdom , with 18.4 million subscribers as of November 2024, [ 4 ] after O2 and EE ...