Apple's Tim Cook: If we unveiled iPhone X after iPhone 8, people would have said, 'You hosed me.'

Key Points
  • The dual September unveiling, but staggered release dates, was not "marketing," Tim Cook says.
  • Cook also says there's no telling when there will be enough iPhone Xs to meet the strong demand.
Tim Cook to CNBC: This is a different kind of rollout for iPhone 8, iPhone X

The dual September unveiling of the iPhone 8 and iPhone X, but staggered release dates, was borne out of necessity and not "marketing," CEO told CNBC after reporting blowout quarterly earnings.

"If we could do anything we wanted to, we would have obviously shipped 8, 8 Plus and X on the same day," Cook said Thursday evening . "But we felt like the most important thing for us to do was to announce them on the same day so we wouldn't have customers buy an 8 and then we announce the X and ship it and they go, 'Oh, you hosed me, I would've bought a X.'"

"That's the reason that we did the stagger," Cook said. "It wasn't a marketing thing. It was we weren't ready to ship; we were still working on [the X]. We accelerated the date at which we were initially planning to do iPhone X. And that's how we got here and we're going to learn a lot."

The iPhone 8 and the redesigned 10th anniversary iPhone X were both unveiled at . But the iPhone 8 and 8 Plus . The $1,000 iPhone X, with no home button and an edge-to-edge super high-resolution screen, was not available until Friday.

Tim Cook visits Apple store on iPhone X launch

Cook also told CNBC on Thursday that the iPhone X was "quickly backlogged" due to strong demand. Asked when supply would catch up, he said there's no telling when. "There's nothing to compare it to is the real answer to that, because it has no predecessor product. It's not replacing something that existed."

The popularity of the iPhone X was on display with long lines Friday after September's more muted availability of the iPhone 8 and 8 Plus.

Apple shares were sharply higher Friday, so much so that the company's stock market value was approaching $900 billion.

Correction: An earlier version of this story said that Apple's market cap hit $900 billion at one point Friday. The company issued a release Friday morning saying it reduced its outstanding shares, so it did not reach $900 billion in valuation.