Apple achieved over 1m pre-orders of the iPhone 4S on the first day

"Apple® today announced pre-orders of its iPhone® 4S have topped one million in a single day, surpassing the previous single day pre-order record of 600,000 held by iPhone 4. iPhone 4S is the most amazing iPhone yet, packed with incredible new features including Apple’s dual-core A5 chip for blazing fast performance and stunning graphics; an all new camera with advanced optics; full 1080p HD resolution video recording; and Siri™, an intelligent assistant that helps you get things done just by asking."

Source:  Press release from Apple, 10th October 2011