Apple has rolled out iOS 8.1.3 for iPhone, iPod touch and iPad devices. The update contains bug fixes, stability enhancements and performance improvements. Apple also preparing to release OS X Yosemite 10.10.2 beta update, which contains a patch for the Thunderstrike vulnerability that allows malware to be injected into Macs via the Thunderbolt port. Apple users with 8GB and 16GB devices will definitely appreciate the reduced storage requirements for updating to the update. The download size of iOS 8.1.2 is 246MB.
Source: https://thehackernews.com/2015/01/apple-iOS-8.1.3-update.html