As of 2015, the iPhone 6 and the iPhone 6 Plus are the newest phone designs released by Apple. New features include a bigger screen, a thinner body, touch ID technology and a retina HD display.
Apple calls the retina HD multi-touch display the most advanced it has ever designed, with higher contrast, improved polarization and more accurate color when viewing at wider angles. The iPhone 6 has a 4.7-inch display with 1334 by 750 pixel resolution, while the bigger and more robust version, the iPhone 6 Plus, has a 5.5-inch display and a 1920 by 1080 pixel resolution.
The touch ID technology uses the owner's fingerprint as a password, and owners can use it to authorize purchases made through Apple's online stores, including those from iBooks, iTunes and the App store. The iPhone 6 and 6 Plus are the first Apple devices to roll out Apple Pay, an alternative electronic method of payment which requires only the phone, the touch ID verification and a merchant's electronic reader to complete the transaction.
Other advanced features of the iPhone 6 and 6 Plus include iOS 8, an advanced operating system, as well as faster wireless and a longer battery life. Both phone models are available in 16-, 64- and 128-gigabyte versions. The iPhone 6 starts at $199, and the iPhone 6 Plus starts at $299.