"In addition, more than 200 million iOS devices are now running the completely redesigned iOS 7, making it the fastest software upgrade in history," Apple said in a statement, referring to its latest mobile operating system.
Demand for the iPhone 5s has exceeded the initial supply and many online orders are scheduled to be shipped in the coming weeks, it said.
"This is our best iPhone launch yet. More than 9 million new iPhones sold -- a new record for first weekend sales," Apple CEO Tim Cook said in the statement.
Shares of Apple jumped over 4 per cent following the sales numbers.
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Both iPhone 5s and iPhone 5c are available in the US, Australia, Canada, China, France, Germany, Hong Kong, Japan, Puerto Rico, Singapore and the UK.
"While we've sold out of our initial supply of iPhone 5s, stores continue to receive new iPhone shipments regularly. We appreciate everyone's patience and are working hard to build enough new iPhones for everyone," Cook said.
The less expensive iPhone 5c is available in the US for a suggested retail price of USD 99 for the 16GB model and USD 199 for the 32GB model.
The world's most valuable technology company launched the iPhone 5c to improve its profit margins and share in the smartphone market, which is dominated by Android phones.