Apple sold over four million iPhone 4S in the three days after it hit the market, more than double that of the iPhone 4 in the same period, making it the fastest-selling phone ever.
Over one million people pre-ordered the phone in the 24 hours after it was announced.
More than 25 million customers have also downloaded the new iOS 5 operating system for their Apple handset.
"iPhone 4S is off to a great start with more than four million sold in its first weekend - the most ever for a phone and more than double the iPhone 4 launch during its first three days," said senior VP of Worldwide Product Marketing Philip Schiller.
"iPhone 4S is a hit with customers around the world, and together with iOS 5 and iCloud, is the best iPhone ever.