The Pixel 3a has a headphone jack to offer 'flexibility', but don't get your hopes up for the Pixel 4

Jack is back, but maybe not for good

The freshly released Pixel 3a and 3a XL have a long list of things (both good and bad) in common with Google's higher-end Pixel 3 and 3 XL devices, but somewhat surprisingly (at least if you didn't pay attention to the torrent of leaks from the past few months), an absent headphone jack is not one of them.

Unlike Apple, which killed good old jack several years ago, never looking back or suggesting in any way the decision would be reversed, plenty of Android smartphone manufacturers remain ...

from PhoneArena http://bit.ly/2WLQX8g