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The iPhone 3GS, stylized as iPhone 3G🅂, [a] is a smartphone that was developed and marketed by Apple Inc. It is the third generation of the iPhone and the successor to the iPhone 3G . It was unveiled on June 8, 2009 [ 6 ] at the WWDC 2009 , which took place at the Moscone Center in San Francisco.
Following the release of the successor iPhone 3GS model one year later, the iPhone 3G remained on sale but became Apple's budget phone offer, with its price reduced. This $99 iPhone 3G required a two-year contract and was available only in black and with 8 GB of storage, but came bundled with the then-new iPhone OS 3.0 firmware. [15]
Vietnam is putting considerable effort into modernization and expansion of its telecommunication system. Domestically, all provincial exchanges are digitalized and connected to Hanoi, Da Nang and Ho Chi Minh City by fiber optic cable or microwave radio relay networks.
Upgrading to iPhone OS 3 was free for iPhone. Upgrading to iPhone OS 3 originally cost iPod Touch users $9.95; [9] updating to 3.1.x from 2.x cost only $4.95. [10] [11]iPhone OS 3 was the last major version of iOS for which there was a charge for iPod Touch users to upgrade.
The Internet in Vietnam is growing rapidly. Between 2001 and 2005, the number of Internet users increased from 800,000 to 3 million. By 2007, Vietnam reported Internet penetration levels of 11.5%, rising to 22.4 percent in 2008 and 45.2% in 2010.
Since the Autumn of 2016, Wifi Calling / Voice over Wifi has been available for customers of Telenor Denmark, including the ability to do handover to and from the 4G (VoLTE) network. This is available for several Samsung and Apple handsets. AT&T [29] and Verizon [30] are going to launch Wi-Fi calling in 2015.
iOS 6 is the sixth major release of the iOS mobile operating system developed by Apple Inc, being the successor to iOS 5.It was announced at the company's Worldwide Developers Conference on June 11, 2012, and was released on September 19, 2012.
Telex or TELEX (Vietnamese: Quốc ngữ Ä‘iện tín, lit. 'national language telex'), is a convention for encoding Vietnamese text in plain ASCII characters. Originally used for transmitting Vietnamese text over telex systems, it is one of the most used input method on phones and touchscreens and also computers.