Apple co-founder Steve Wozniak has warned the iPhone giant that removing the 3.5mm headphone jack from its upcoming device would be a grave error.

Wozniak said Apple should think carefully before "ticking off" customers with the controversial decision to remove the port, which has been present on every iPhone since the original was released in 2007. "If it's missing the 3.5mm earphone jack, that's going to tick off a lot of people," Wozniak told the Australian Financial Review.

After co-foundin...

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