Rumors say it’s pretty likely that Apple will drop the popular 3.5mm headphone jack from its next smartphone. The decision isn’t sitting well with most potential iPhone 7 buyers; even Apple co-founder Steve Wozniak has warned that moving to an all-in-one lightning connector is “going to tick off a lot of people.”

There’s a possibility that Apple will include some Lightning-equipped earphones and a Lightning-to-jack adaptor with the next iPhone, but Wozniak doesn’t think this will placate everyone.

“Mine have custom ear implants, they fit in so comfortably; I can sleep on them and everything. And they only come out with one kind of jack, so I'll have to go through the adapter,” he told The Australian Financial Review.

If the 3.5mm jack does disappear, there’s always the wireless option. But Woz thinks we’re not yet at the stage where this can match the quality provided by wired headphones.

"I have cars where you can plug in the music, or go through Bluetooth, and Bluetooth just sounds so flat for the same music," he said. “If there’s a Bluetooth 2 that has higher bandwidth and better quality, that sounds like real music, I would use it. But we’ll see.”

Bluetooth 5, the next revision of the global wireless standard, is set to arrive by 2017 at the latest. It will double the speed and quadruple the range of low energy connections while increasing the capacity of connectionless data broadcasts by 800 percent.

At its Developer Forum in San Francisco last week, Intel spoke about how it wants to replace the 3.5mm jack with USB Type-C. Wozniak hinted that Apple should consider heeding the chip maker's advice and follow "the lead" of its competitors.

“I think USB-C is going to be the future," said Woz. "One of my favorite Android phones, the Nexus 5X, uses that connector. It gives it a higher level in my own thinking."