iOS 8 IPSW Direct Download Links
Apple has released iOS 8 update for all compatible devices, and while most users are best served by downloading the update through the Over-the-Air mechanism on their iPhone, iPad, or iPod touch, another option is to install the update manually by means of IPSW firmware files. While not particularly difficult, updating with firmware is considered a bit more advanced, and it requires the download of a full firmware package file which is upwards of 6GB or so, which is considerably larger than the smaller delta update offered through OTA.