iOS update improves performance on older Apple devices

Apple launched an update to its iOS 8 mobile operating system that will improve performance on older devices including the iPhone 4s and second generation iPad.
Apple's software update, 8.1.1, went live Monday. According to a description, the update includes "bug fixes, increased stability and performance improvements for iPad 2 and iPhone 4s."
Since Apple launched iOS 8 in September, complaints surfaced from owners of older devices that the new software was slowing the performance of their hardware.
This is the third iOS 8 update issued by Apple since its debut. An initial update was removed and replaced because some users who downloaded it reported a loss of cellular signal. Last month, Apple launched iOS 8.1, which added support for mobile payments service Apple Pay.