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  2. iPhone 4 - Wikipedia

    en.wikipedia.org/wiki/IPhone_4

    The iPhone 4 is a smartphone that was designed, developed, and marketed by Apple Inc. It is the fourth generation of the iPhone lineup, succeeding the iPhone 3GS and preceding the iPhone 4s. Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010, at Apple's Worldwide Developers Conference in San Francisco, [ 9] and ...

  3. iOS 4 - Wikipedia

    en.wikipedia.org/wiki/IOS_4

    Drops support for the iPhone (1st generation), iPod Touch (1st generation) and, from iOS 4.3 onwards, for the iPhone 3G and iPod Touch (2nd generation). iOS 4 is the fourth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iPhone OS 3. It was announced at the Apple Special Event on April 8, 2010 ...

  4. iOS version history - Wikipedia

    en.wikipedia.org/wiki/IOS_version_history

    iOS version history. iOS is a mobile operating system developed by Apple Inc. and was first released as iPhone OS in June 2007, coinciding with the launch of the first generation iPhone. [ 1] iPhone OS was renamed iOS following the release of the iPad, starting with iOS 4. [ 2] With iOS 13, Apple began offering a separate operating system ...

  5. iOS - Wikipedia

    en.wikipedia.org/wiki/IOS

    The original iPhone OS (1.0) up to iPhone OS 3.1.3 used Darwin 9.0.0d1. iOS 4 was based on Darwin 10. iOS 5 was based on Darwin 11. iOS 6 was based on Darwin 13. iOS 7 and iOS 8 are based on Darwin 14. iOS 9 is based on Darwin 15. iOS 10 is based on Darwin 16. iOS 11 is based on Darwin 17. iOS 12 is based on Darwin 18. iOS 13 is based on Darwin ...

  6. LHDC (codec) - Wikipedia

    en.wikipedia.org/wiki/LHDC_(codec)

    Website. www.lhdc-audio.org. Low Latency High-Definition Audio Codec ( LHDC) is an audio codec technology developed by Savitech. LHDC allows high-resolution audio streaming over Bluetooth. It is a high-quality Bluetooth codec based on the A2DP Bluetooth protocol and allows a bit-rate of up to 900 kbit/s compared to SBC's bit rate of 345 kbit/s .

  7. Darwin (operating system) - Wikipedia

    en.wikipedia.org/wiki/Darwin_(operating_system)

    Darwin is the core Unix-like operating system of macOS (previously OS X and Mac OS X), iOS, watchOS, tvOS, iPadOS, audioOS, visionOS, and bridgeOS. It previously existed as an independent open-source operating system, first released by Apple Inc. in 2000. It is composed of code derived from NeXTSTEP, FreeBSD, [ 3] other BSD operating systems ...

  8. Bluetooth Low Energy - Wikipedia

    en.wikipedia.org/wiki/Bluetooth_Low_Energy

    The first smartphone to implement the 4.0 specification was the iPhone 4S, released in October 2011. [18] A number of other manufacturers released Bluetooth Low Energy Ready devices in 2012. The Bluetooth SIG officially unveiled Bluetooth 5 on 16 June 2016 during a media event in London.

  9. iPhone 4s - Wikipedia

    en.wikipedia.org/wiki/IPhone_4S

    The iPhone 4s[ a] is a smartphone that was designed, developed, and marketed by Apple Inc. It is the fifth generation of the iPhone, [ 12] succeeding the iPhone 4 and preceding the iPhone 5. It was announced on October 4, 2011, at Apple's Cupertino campus, and was the final Apple product announced in the lifetime of former Apple CEO and co ...