Pre-orders for the iPhone 6 and iPhone 6 Plus topped a record-breaking 4 million in the first 24 hours the phones were on sale, according to Apple.

“Demand for the new iPhones exceeds the initial pre-order supply and while a significant amount will be delivered to customers beginning on Friday and throughout September, many iPhone pre-orders are scheduled to be delivered in October,” Apple said in a statement.

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Apple last week unveiled the iPhone 6 and iPhone 6 Plus, in a move aimed at satisfying consumer preference for bigger smartphone displays.

The announcement means Apple may see shortages and long lines at its retail stores when sales begin on Friday.

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“Pre-orders for iPhone 6 and iPhone 6 Plus set a new record for Apple, and we can’t wait to get our best iPhones yet into the hands of customers starting this Friday,” Apple chief executive Tim Cook said in the statement.

Sales are set to open at 8 am local time in the US, Australia, Canada, France, Germany, Hong Kong, Japan, Puerto Rico, Singapore and Britain. Some 20 more countries will get the iPhone September 26.