Phone calls don't work? (iPhone 4S)?

This is seriously the most frustrating thing ever.
I just recently spent a week at church camp in the middle of nowhere, with little to no signal the whole time. I didn't really use my phone, other than to send a few texts which rarely sent because of the lack of signal. On the first two days, I was able to call my mom twice, and after that I would call and not hear any ringing. It would say she answered the phone but I couldn't hear anything. It turns out, she also couldn't hear me. I figured I just didn't have signal. But when I got back, it never went back to normal. I can't hear anything during a call, and they can't hear me ether. I dropped my phone and cracked it about two months ago, and someone told me to take it to Apple and they would replace it since it's a hardware malfunction, but of course they're probably going to tell me that it was my fault since I dropped it, even though this just started happening.
I'm home alone and really want to order some chinese food but can't because my stupid phone won't work.

How to fix my apple earbuds?

A pair of earbuds came with my iphone when i got it and after about 3 months the right side broke and no sound comes out of it. What should i do?

Camera roll and photostream take up too much space on iphone 5

I have 16GB Iphone 5 and i have 2.03 GB left! I plug my phone into Itunes and it says that 6.79 GB is taken up by my pictures (834 photos) I have 348 on camera roll and 486 on photo stream- which makes 834. I only want to keep the pictures that i have on my camera roll on my phone, why do i have to have a photostream too? Is there anyway i can fix this?