At the most basic level, Personal Communications Service (PCS) describes a set of communications capabilities which allows some combination of terminal mobility, personal mobility, and service profile management. More specifically, PCS refers to any of several types of wireless voice or wireless data communications systems, typically incorporating digital technology, providing services similar to advanced cellular mobile or paging services. In addition, PCS can also be used to provide other wireless communications services, including services which allow people to place and receive communications while away from their home or office, as well as wireless communications to homes, office buildings and other fixed havelocations. Described in more commercial terms, PCS is a generation of wireless-phone technology that combines a range of features and services surpassing those available in analog- and digital-cellular phone systems, providing a user with an all-in-one wireless phone, paging, messaging, and data service.
Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network. Users and providers may refer to such a message as a PXT, a picture message, or a multimedia message. The MMS standard extends the core SMS capability, allowing the exchange of text messages greater than 160 characters in length. Unlike text-only SMS, MMS can deliver a variety of media, including up to forty seconds of video, one image, a slideshow of multiple images, or audio.
Celcom Axiata Berhad, DBA Celcom, is the oldest mobile telecommunications provider in Malaysia. Celcom is a member of the Axiata group of companies. Being one of the very few companies in Malaysia to originally obtain a cellular phone license, it successfully introduced mobile telephony in Malaysia through its ART-900 service, using first generation (analogue) ETACS specifications of the United Kingdom, a derivative of the US-AMPS technology. The ETACS ART-900 was started using the prefix "010". Celcom now uses the dialling prefix identifier of "013" and "019" and offer digital GSM, an originally European standard, now largely a world standard for mobile communications. The original frequency band for GSM is 900 MHz, and was soon extended to 1800 MHz to cater for a much wider bandwidth requirements. The 2100 MHz band is used for their dual-channel HSPA+ network. Celcom is also licensed and has been operating FDD-LTE on 1800 MHz and 2600 MHz.
Qualcomm Incorporated is an American multinational semiconductor and telecommunications equipment company that designs and markets wireless telecommunications products and services. It derives most of its revenue from chipmaking and the bulk of its profit from patent licensing businesses. The company headquarters is located in San Diego, California, United States, and has 224 worldwide locations. The parent company is Qualcomm Incorporated (Qualcomm), which includes the Qualcomm Technology Licensing Division (QTL). Qualcomm's wholly owned subsidiary, Qualcomm Technologies, Inc. (QTI), operates substantially all of Qualcomm's R&D activities.
A car phone is a mobile radio telephone specifically designed for and fitted into an automobile. This service originated with the Bell System, and was first used in St. Louis on June 17, 1946.
GSM frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of GSM mobile phones and other mobile devices.
Mobile radio telephone systems were telephone systems of wireless type that preceded the modern cellular mobile form of telephony technology. Since they were the predecessors of the first generation of cellular telephones, these systems are sometimes retroactively referred to as pre-cellular systems. Technologies used in pre-cellular systems included the Push to Talk, Mobile Telephone Service (MTS), Improved Mobile Telephone Service (IMTS), and Advanced Mobile Telephone System (AMTS) systems. These early mobile telephone systems can be distinguished from earlier closed radiotelephone systems in that they were available as a commercial service that was part of the public switched telephone network, with their own telephone numbers, rather than part of a closed network such as a police radio or taxi dispatch system.
The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network.
United States Cellular Corporation, doing business as U.S. Cellular, is a regional carrier which owns and operates the fifth-largest wireless telecommunications network in the United States, serving 5 million customers in 426 markets in 23 U.S. states as of the first quarter of 2017. The company has its headquarters in Chicago, Illinois.
AirTouch Communications was a U.S.-based wireless telephone service provider, created as a spin-off on Pacific Telesis on April 1, 1994. Its headquarters were in One California in the Financial District, San Francisco, California. After a series of mergers, the company's vestiges are now part of Verizon Wireless.
A mobile phone operator, wireless provider, or carrier is a mobile telecommunications company that provides wireless Internet GSM services for mobile device users. The operator gives a SIM card to the customer who inserts it into the mobile device to gain access to the service.
Amp'd Mobile was a mobile phone service launched in the United States in late 2005, and in Canada in early 2007. The company was a Mobile Virtual Network Operator. Its primary non-Venture Capital investors were MTV Networks and Universal Music Group. The service targeted 18- to 35-year-olds, and was the first integrated mobile entertainment company for youth, young professionals and early adopters, and was, like Helio, a 3G carrier in the US specifically targeting that demographic. Amp'd Mobile offered voice services as well as 3G data services such as wireless broadband based on Verizon Wireless's EV-DO network, text and picture messaging, push-to-talk, and over-the-air downloadable applications and content from its Amp'd Live service.
Generic Access Network (GAN) extends mobile voice, data and multimedia applications over IP networks. Unlicensed Mobile Access (UMA) is the commercial name used by mobile carriers for external IP access into their core networks. The latest generation system is named Wi-Fi Calling or VoWiFi by a number of handset manufacturers, including Apple and Samsung, a move that is being mirrored by carriers like T-Mobile US and Vodafone.
T-Mobile US, Inc., commonly shortened to T-Mobile, is a United States-based wireless network operator whose majority shareholder is the German telecommunications company Deutsche Telekom (DT). Its headquarters are located in Bellevue, Washington, in the Seattle metropolitan area. T-Mobile is the third largest wireless carrier in the United States with 79.7 million customers as of the end of Q4 2018.
The history of the prepaid mobile phone began in the 1990s when mobile phone operators sought to expand their market reach. Up until this point, mobile phone services were exclusively offered on a postpaid basis (contract-based), which excluded individuals with poor credit ratings and minors under the age of 18.
Philip Thomas Porter was an electrical engineer and one of the guiding pioneers of the invention and development of early cellular telephone networks.
Cellular frequencies are the sets of frequency ranges within the ultra high frequency band that have been assigned for cellular-compatible mobile devices, such as mobile phones, to connect to cellular networks. Most mobile networks worldwide use portions of the radio frequency spectrum, allocated to the mobile service, for the transmission and reception of their signals. The particular bands may also be shared with other radiocommunication services, e.g. broadcasting service, and fixed service operation.
