iPhone 4S Now on Sale: Can Apple's Latest Smartphone Smash Previous Debut Weekend Records?

iPhone 4S went live Oct. 14, and thousands stood in line to get one at Apple stores around the world. All the rumors and speculation are gone and so now the hype machine can ramp up for iPad 3 and Samsung Nexus Prime.

Apple could sell as many as four million iPhone 4S this weekend, one analyst told Bloomberg Businssweek. Virtually indistinguishable from iPhone 4 on the outside, iPhone 4S offers several meaningful improvements. Anyone upgrading from an iPhone 4 or 3GS, can look forward to a speed boost, because of the new dual-core A5 processor, the same one Apple uses in the iPad 2.

Siri, the intelligent assistant can create calendar reminders, restaurant recommendations, weather reports and more. Additionally, there is an improved 8-megapixel rear-facing camera with improved flash and HD 1080p video. With iPhone 4S, you also get iOS 5, the most complete version of Apple's mobile operating system, and that alone comes with more than 200 new features. It features iCloud integration with wireless syncing, a simplified notification system, iMessage, and Twitter integration.

iPhone 4S comes in black or white, in 16GB ($199), 32 GB ($299), or 64GB ($399) varieties, and works with AT&T, Sprint, and Verizon. Even if iPhone 4S only sells two or two and a half million devices this weekend, it would still crush the iPhone 4 opening weekend. It might even end up being the best debut for a smartphone ever. As the competition increases, as it no doubt will given the technology is still very young, maybe more companies will start debuting devices on Fridays, and it will be easier to compare the numbers that way.

Let us know in the comments if you felt like Duncan Fraser (in the picture) when you got your new iPhone 4S.