Conversation so far:
what is the weight of an iphone 7
The mass of an iPhone 7 is 138 grams.
does the iphone 7 have a headphone jack
Changes introduced with the iPhone 7 included the removal of the 3.5 mm headphone jack.
what are the downsides of the removal of the 3.5 mm headphone jack from the iphone 7
Criticism of the iPhone 7 centered around the removal of the headphone jack, including the inability to use wired headphones with the included adapter and charge the device simultaneously.

Question: why was the headphone jack removed
Self-contained rewrite: why was the headphone jack removed from the iphone 7