Cracked iPhone won't turn on?

I dropped my iPhone in May, i want to say, and the screen shattered but everything was still intact and the screen worked fine. I was using it until July 4th when i got home from watching fireworks and it wouldn't turn on. I took it in to the at&t store the next day to change over my SIM card to my old phone while i figured out how i would fix the iPhone and while i was standing there, i tried turning on my iPhone and it turned on fine but the guy had already changed the SIM over. Just today it was working fine (the screen is still cracked so i just use it for internet for now) and i put it down for a second and it wouldn't turn on again. The only thing i'm really worried about is my pictures, but is this just because of the screen? Will it turn on fine when i replace the screen?

I don't have a iphone, I'm team android, however, I do have a ipod touch, and I once cracked my screen really bad, took it to apple and they fixed it with $100, I don't think your screen cracking would have anything to do with the phone not wanting to turn on, it sounds like a hardward problem. However depending on how hard you dropped it, it could have messed it up pretty bad, take it back the AT&T store and tell them this, tell them its still not working and they should give you another one, I dropped my phone once and it was weird after it so I took it to sprint and they replaced it.

I kind of shattered my iPhone 7 in July and everything still worked. Today I dropped it and my screen went blank. So now I can't see anything on my screen. I hear my notifications, but I can't see anything.