Is my iPhone not working well because the screen is really cracked?

Okay, so I have an iPhone 4S and it has been working perfectly fine until last night. It is really cracked and some pieces of the glass have fallen out (oops) but now the top part of my screen doesn't really work. The home button works fine, but the lock button does not. Also, I can still type although its a struggle but whenever something is more towards the top of the screen it is nearly impossible to click on. Is this because of the cracks or is something wrong with my phone?

I think you should see what apple can do. If you purchased a warranty than apple can cover it although it may be expensive. You could try ifixyouri.com or ubreakifix.com. Both places fix apple products and have really good reviews. I know some people who have gone there and they are not expensive from what I heard.

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