Iphone 4s

The iPhone 4S is a touchscreen-based, slate-sized 3G smartphone developed by Apple Inc. It is the fifth generation of the iPhone and retains the exterior design of its predecessor, the iPhone 4, but is host to a range of improved hardware specifications and software updates.The phone added a voice recognition system known as Siri and a cloud storage service named iCloud. Some of the device's functions may be voice-controlled through Siri.

The iPhone 4S was unveiled at Apple's "Let's Talk iPhone" event on October 4, 2011 in Cupertino, California. Apple started accepting pre-orders requests for the iPhone 4S on October 7, 2011 in seven initial countries (United States, Canada, Australia, United Kingdom, France, Germany and Japan) with the first delivery date set for October 14, 2011 and available on that same day for direct in-store sales in those countries. It was released in 22 more countries, including Ireland, Mexico, and Singapore on October 28.^[

The iPhone 4S was unveiled at Apple's "Let's Talk iPhone" event on October 4, 2011 in 

ttachment: initial; background-color: initial; background-image: none; background-position: initial initial; background-repeat: initial; color: #0645ad; text-decoration: none;" title="Cupertino, California">Cupertino, California. Apple started accepting pre-orders requests for the iPhone 4S on October 7, 2011 in seven initial countries (United States, Canada, Australia, United Kingdom, France, Germany and Japan) with the first delivery date set for October 14, 2011 and available on that same day for direct in-store sales in those countries. It was released in 22 more countries, including Ireland, Mexico, and Singapore on October 28.

When released the iPhone 4 used iOS 4. However it has an upgradeable operating system, accepting up to at least iOS 5.1 (latest available, April 2012).In October 2011, the iPhone 4S was announced, which retains the same form factor but includes some upgrades such as the A5 processor, iOS 5, and an improved ^]

The iPhone 4 was made available for pre-order on June 15, 2010. Customers attempting to pre-order the iPhone 4 reported problems with the pre-order process on the U.S. and U.K. online Apple Stores which crashed due to the surge in traffic.The same issue was reported with AT&T and SoftBank, Apple's exclusive partners in the United States and Japan respectively, who suspended advance sales of the iPhone 4 as demand threatened to exceed supply. Retail stores were also unable to complete pre-order transactions due to the servers crashing.