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These stations or retailers use a Retailer SIM card to top up prepaid credits on a subscriber's mobile phone. This SIM card functions similarly to commercially available prepaid SIM cards but with additional reloading/top-up functionality. It employs click-and-browse SIM technology for hassle-free transactions.
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
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. The purchased credit is used to pay for telecommunications services at the point the service is accessed or consumed.
TNT is known for its low-cost packages, catering mostly to the mobile needs of the masses of the Philippines. From classics like Gaan Text 10 to unlimited offers like Unlitext Extra 30, TNT provides a wide range of offerings in call, text, mobile internet, and other value-added services. Talk 'N Text logo used from 2000 to 2010.
The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.
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.
Vodafone Germany's network serves both prepaid and postpaid customers on GSM and LTE (Long Term Evolution). In July 2019, Vodafone started providing 5G services. [3] At the end of 2010, Vodafone had 36.676 million mobile phone or mobile internet customers and 3.945 million customers with a DSL / VDSL connection. [4]
As of March 2023, the penetration rate in Hong Kong was estimated at 282% over a population estimate of over 7.473 million, with 21.61 million public mobile subscriptions. [30] Hong Kong's telecom regulator is the Office of the Communications Authority (OFCA).
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