Question: how do i know how many gigs my iphone 6 is?
Answer: Tap on the "Settings" application on your iPhone. This app is factory-installed on all iPhones.
Tap on "General" from the Settings menu.
Tap on "About" from the General menu.
Scroll down the page to the "Capacity" section. ... 
Scroll down to the "Available" section. ... 
Tip.