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A personal unblocking key (PUK), sometimes called personal unblocking code (PUC), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a 4-8 ...
Unstructured Supplementary Service Data(USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocolused by GSMcellular telephonesto communicate with the mobile network operator's computers. USSD can be used for WAPbrowsing, prepaid callback service, mobile-money services, location-based content services, menu ...
To promote consumer choice and wireless competition by permitting consumers to unlock mobile wireless devices, and for other purposes. Announced in: the 113th United States Congress: Sponsored by: Sen. Patrick J. Leahy (D, VT) Number of co-sponsors: 5: Citations; Public law: Pub. L. Tooltip Public Law (United States) 113–144 (text ...
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Vodafone Limited, 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 18.5 million subscribers as of July 2024, [ 4 ] after O2 and EE, followed by Three. [ 5 ]
The mobile operator said it would offer Sim cards with 20GB of free data each month for six months, as well as access to free calls and texts. Vodafone to offer free mobile connectivity to 200,000 ...
A typical SIM card (mini-SIM with micro-SIM cutout) T-Mobile nano-SIM card with NFC capabilities in the SIM tray of an iPhone 6s cell phone 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 ...
Mobile number portability (MNP)allows people to keep their phone numbers when switching to a new mobile network. Moreover, it has been implemented in various ways across the globe. In most places, like Europe and many other countries, the process is "recipient-led." This means that when you want to switch to a new network, you contact the new ...