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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 3GS, stylised as iPhone 3G🅂 [a] is a smartphone that was designed, developed, and marketed by Apple Inc. It is the third generation iPhone and the successor to the iPhone 3G . It was unveiled on June 8, 2009 [ 8 ] at the WWDC 2009 which took place at the Moscone Center in San Francisco.
GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM . Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.
The iPhone 13 and 13 Mini feature the same camera system with three cameras: one front-facing camera (12MP f/2.2) and two back-facing cameras: a wide (12MP f/1.6) and ultra-wide (12MP f/2.4) camera. The back-facing cameras both contain larger sensors for more light-gathering with new sensor shift optical image stabilization (OIS) on the main ...
The iPhone 15 is the first major redesign since the iPhone 12, featuring rounder edges and a slightly curved display, and back glass. Both models are available in five colors: blue, pink, yellow, green and black. [3] This makes it the first entry level iPhone since the iPhone XR to not ship with a Product Red variant at launch.
Voice over Long-Term Evolution ( acronym VoLTE) is an LTE high-speed wireless communication standard for voice calls and SMS using mobile phones and data terminals. [ 1][ 2] VoLTE has up to three times more voice and data capacity than older 3G UMTS and up to six times more than 2G GSM. It uses less bandwidth because VoLTE's packet headers are ...
Nikola Tesla laid the theoretical foundation for wireless communication in 1890. Guglielmo Marconi, known as the father of radio, first transmitted wireless signals two miles away in 1894. Mobile technology gave human society great change. The use of mobile technology in government departments can also be traced back to World War I.
3G is the third generation of wireless mobile telecommunications technology. It is the upgrade to 2G, 2.5G, GPRS and 2.75G Enhanced Data Rates for GSM Evolution networks, offering faster data transfer, and better voice quality. [1] This network was superseded by 4G, and later by 5G. This network is based on a set of standards used for mobile ...