NEW YORK (AP) — Apple says it had more than 4 million pre-orders of its new iPhone 6 and iPhone 6 Plus in 24 hours, exceeding its initial pre-order supply.

The company says the phones will be delivered to customers starting Friday and throughout September, but many won’t be delivered until October.

Phones will be available on a walk-in basis beginning Friday at Apple retail stores. Both phones will also be available beginning Friday from AT&T, Sprint, T-Mobile, Verizon Wireless and other carriers and other authorized Apple resellers.

The new phones were announced last week and have larger screens, faster performance, and come equipped with Apple Pay, a contactless payment service. They start at $199 at most wireless providers with a two-year contact.