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Exchange ActiveSync (commonly known as EAS) is a proprietary protocol designed for the synchronization of email, contacts, calendar, tasks, and notes from a messaging server to a smartphone or other mobile devices. The protocol also provides mobile device management and policy controls. The protocol is based on XML.
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA.
iPhone. The iPhone 3G is a smartphone designed, developed, and marketed by Apple Inc. It is the second generation of iPhone, successor to the original iPhone, and was introduced on June 9, 2008, at the WWDC 2008 which took place at the Moscone Center in San Francisco.
The iPhone 4 was released on June 24, 2010. According to Apple, over 1.7 million iPhone 4 units were sold in the first few days, which is the most out of any phone ever sold. These sales propelled AT&T to strong Q2 results. The iPhone 5 was released on September 12, 2012. Apple reported selling 5 million iPhone 5's in the first weekend. [77]
three.co.uk. Hutchison 3G UK Limited, trading as Three UK, is a British telecommunications company based in Reading, England. It is an indirect, wholly-owned subsidiary of CK Hutchison Holdings, a limited liability Cayman Islands company registered and listed in Hong Kong. [4] Three is the fourth-largest mobile network operator in the United ...
There are 51 MTAs, 493 BTAs and 175 EAs in the United States. The Advanced Wireless Services (AWS) bands, auctioned in the summer of 2006, were for 1,710–1,755 MHz, and 2,110–2,155 MHz. The spectrum was divided into blocks: A blocks were for Cellular Market Areas, based on existing cellular (1G) licenses, and were 2 × 10 MHz.
The initial network activation was delayed due to unforeseen circumstances related to government agencies vacating the allocated spectrum. Despite launching the first 3G phone in November 2007, [57] the network itself wasn't operational until May 2008 in New York City. [58] [59] By 2009, T-Mobile had expanded its 3G network to cover over 200 ...
Preferred Roaming List. The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM. The PRL indicates which bands, sub bands, and ...