Iphone SE won't turn on?

My iphone I bought online won't turn on. Any suggestions? I try charging it but nothing at all. Then, it shows the red bar but it never goes off of that.

Well maybe it got flashed. Take it to local mobile repair shop.

Chances are you bought a damaged phone. I'm not sure where you bought it, but try to see if you can get a refund from where you purchased it.

And no, you can't really "flash" an iPhone.

Go to apple store.