Related Research Articles
A telephone card, calling card or phone card for short, is a credit card-size plastic or paper card used to pay for telephone services. It is not necessary to have the physical card except with a stored-value system; knowledge of the access telephone number to dial and the PIN is sufficient. Standard cards which can be purchased and used without any sort of account facility give a fixed amount of credit and are discarded when used up; rechargeable cards can be topped up, or collect payment in arrears. The system for payment and the way in which the card is used to place a telephone call vary from card to card.
A SIMcard 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. Technically the actual physical card is known as a universal integrated circuit card (UICC); this smart card is usually made of PVC with embedded contacts and semiconductors, with the SIM as its primary component. In practice the term "SIM card" is still used to refer to the entire unit and not simply the IC.
A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone that does not impose any SIM restrictions.
Roaming is a wireless telecommunication term typically used with mobile devices, such as mobile phones. It refers to a mobile phone being used outside the range of its native network and connecting to another available cell network.
The International Mobile Equipment Identity (IMEI) is a numeric identifier, usually unique, for 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems.
Network switching subsystem (NSS) is the component of a GSM system that carries out call out and mobility management functions for mobile phones roaming on the network of base stations. It is owned and deployed by mobile phone operators and allows mobile devices to communicate with each other and telephones in the wider public switched telephone network (PSTN). The architecture contains specific features and functions which are needed because the phones are not fixed in one location.
GSM services are a standard collection of applications and features available over the Global System for Mobile Communications (GSM) to mobile phone subscribers all over the world. The GSM standards are defined by the 3GPP collaboration and implemented in hardware and software by equipment manufacturers and mobile phone operators. The common standard makes it possible to use the same phones with different companies' services, or even roam into different countries. GSM is the world's most dominant mobile phone standard.
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. If there is no credit, then access is denied by the cellular network or Intelligent Network. Users can top up their credit at any time using a variety of payment mechanisms.
Prepaid refers to goods and services paid for in advance. Examples include postage stamps, attorneys, tolls, public transit cards like the Greater London Oyster card, pay as you go cell phones, and stored-value cards such as gift cards and preloaded credit cards.
A mobile phone feature is a capability, service, or application that a mobile phone offers to its users. Mobile phones are often referred to as feature phones, and offer basic telephony. Handsets with more advanced computing ability through the use of native code try to differentiate their own products by implementing additional functions to make them more attractive to consumers. This has led to great innovation in mobile phone development over the past 20 years.
Telit Cinterion is an Internet of Things (IoT) Enabler company headquartered in Irvine, California, United States. It is a privately held company with key operations in the US, Brazil, Italy, Israel, and Korea.
Gemalto was an international digital security company providing software applications, secure personal devices such as smart cards and tokens, e-wallets and managed services. It was formed in June 2006 by the merger of two companies, Axalto and Gemplus International. Gemalto N.V.'s revenue in 2018 was €2.969 billion.
Truphone is a GSMA-accredited global mobile network that operates its service internationally. The company is headquartered in London and has offices in ten other countries, being spread across four continents.
Telestial is a mobile virtual network operator headquartered in Boston with a large share of North America’s international cell phone market. Telestial offers travelers a local cell phone service at local rates with a local cell phone number as an alternative to an expensive phone rental and convenient but expensive international roaming. Telestial is a provider of international cell phones and SIM cards.
Transatel is a telecom corporation headquartered in Paris, La Défense, and led by the founders Jacques Bonifay (CEO) and Bertrand Salomon. NTT Communications took a majority stake in the company on 28 February 2019, transferred to NTT Ltd. on 1 July 2019.
WorldCell is an American-based corporation that provides international mobile service to federal agencies, international businesses, and individual travelers.
Cellular Abroad is a mobile virtual network operator and internet retailer based in Los Angeles that uses GSM technology to provide international wireless voice, messaging and data services. Cellular Abroad sells and rents unlocked international GSM cell phones, portable WiFi hotspots and SIM Cards under the National Geographic Society brand.
Keepgo is an American telecom company founded by David Lipovkov and Guy Zbarsky.
eUICC refers to the architectural standards published by the GSM Association (GSMA) or implementations of those standard for eSIM, a device used to securely store one or more SIM card profiles, which are the unique identifiers and cryptographic keys used by cellular network service providers to uniquely identify and securely connect to mobile network devices. Applications of eUICC are found in mobile network devices that use GSM cellular network eSIM technology.
References
- ↑ Andrea Sachs (2011-05-06). "Travelers, phone home — it's so SIMple". The Washington Post . Washington, D.C. ISSN 0190-8286. OCLC 1330888409.
- ↑ "About OneSimCard International Cell Phone Service".
- ↑ "Spending: Phone home and save - chicagotribune.com". Chicago Tribune . Archived from the original on 2012-02-06.
- ↑ "Cheap Places to Travel in April". Simify. Retrieved 2023-12-12.
- ↑ Bushnell, Davis (2008-07-20). "Answering call for cheaper phone rates". Boston.com.
- 1 2 "InformationWeek, serving the information needs of the Business Technology Community".
- 1 2 3 "OneSimCard Standard International SIM".
- ↑ "International SIM Card. Roaming SIM Simify".
- 1 2 [ dead link ]
- ↑ "International M2M SIM Card | Multi Network SIM card for IoT from OneSimCard".
- ↑ "International SIM Card | Prepaid Roaming SIM from OneSimCard".