iPhone 6 dropped on my sink no cracks but broken inside When I dropped my iPhone on the sink it didn't crack but it did break inside.

I can't use my iPhone. I can turn it on but it isn't fully functional. There are lines and white blocks on the screen.

I am wondering, if I have a warranty, can I get it repaired for free?
Ouch! There's two ways you can possibly save your phone here.

Accidental damage is covered under AppleCare+, which is a separate purchase. If you don't know you have this, you probably don't. 

(But try calling Apple support at 800-275-2273 and give them the serial number)

You may also have insurance through your carrier (commonly called Asurion, TEC, or something else similar), if you have this, it's a separate line item on your phone bill.

If not, I'm afraid you're out of luck :(