At a certain point after it unveiled the brand new iPhone 6s family, Apple has quietly added support for Bluetooth 4.2 to its year-old iPhone 6 series and the iPad Air 2. Back in 2014 when they launched, the iPhone 6 and iPhone 6 Plus featured Bluetooth 4.0, while now it seems that Apple has equipped the phones with either the hardware to support the latest Bluetooth 4.2 standard, or has pushed a firmware to make the improvements possible. Naturally, the iPhone 6s family also comes with the same Bluetooth 4.2 connectivity.
So what is the benefit of having this latest version of the Bluetooth spec? It's mostly about speed: 4.2 brings a 2.5-fold increase in speeds and a 10-fold increase in data capacity. It also improves on its privacy, security and power efficiency aspects.
All of this coincides with the expected upcoming launch of a new, Bluetooth 4.2-enabled Apple Keyboard, Magic Mouse and Magic Trackpad.
At the same time, the original iPad Air, iPad mini 2, and iPhone 5s all remain on Bluetooth 4.0.