IPhone 5 doesn't notify me about anything?

I've had my iPhone 5 for almost a year now and about a few months ago, my phone stopped notifying me of texts, calls, alerts, etc. When i wake my phone up I can see the notification, but it never rings. For example my phone doesn't ring until the person calls me twice. Texts don't ring at all and neither does any other app.
Things I've tried:
- Turning the ring ON
- changing sim cards twice
- looking at the settings

Is H2O wireless a good company? Will it work on a unlocked iphone 5c?

I'm trying to get an unlocked iphone 5c, i have metro pcs right now but they are service is so bad i want to switch but i can't afford a good company like ATT or Verizon. I heard a lot of good things about H2O but i don't want to waste my money, you know? I have unlimited minutes, texting and data right now with metro can i get the same with h2o? I use my phone A LOT so i need something that works well for me Please Help

IPhone 5s network connection problem?

Here's the deal. I never had any problems before but then out of the blue, it started saying "unable to connect to ___"

Sometimes it connects for a minute or so and then disconnects, sometimes it asks for the password, others no passoword, and mostly I can't connect

Here's what I have tried:
1. Reset network connections. Didn't work, didn't even ask me for a password when trying to connect after the reset?
2. STatic IP address
3. Auto proxy
4. Resetting the router
5. "forget this network"

Any other suggestions? My brother just came home from college and there's like a 500% chance that he may have affected it. I think?

How much would this iphone repair cost?

So last night I was super mad, and I threw my phone at a wall. After that, I picked my phone up, and the screen wasn't cracked, but it was like a purple-ish color, and after about 2 minutes, my phone screen went completely black. My phone still makes a noise when I plug it in to charge, but the screen is completely black. How can I fix this?

Added (1). ****And when iphones are repaired/replaced, do I still get to keep all my contacts, or do they disappear?*****

Putting an Iphone 5s in a 4 case?

I bought a Chanel Iphone case/wallet. It is made for a 4/4s, which I currently have. However I'm planning on purchasing a 5s pretty soon, and don't want to spend all the $ to buy a new Chanel case. Do you think I could fit the 5s in the 4 case? What is the size difference? I thought the 5s is a little smaller than the 4, I was thinking if I buy a silicone case for the 5s that it will make up for some of the size difference and it will still fit in the wallet case… Anybody have any experience here?

On an iPhone, how do I play audio while my phone is locked?

A lot of websites list these as the "simple" instructions to follow when you want a youtube video to play audio while your phone is locked:

"1. Open youtube, watch video

2. Lock it while the video is playing

3. On lock screen, double-tap home

4. Click play on controls "

I can follow all these steps, but for some reason, the audio doesn't play. Time moves forward so I know that it's not paused. And the regular video plays sound so I know that there's nothing wrong with its ability to play noise.

Is buying a broke iPhone 5s a good idea?

I have an Android and i hate it but since iPhones are so expensive on the Straighttalk service, i don't have enough money to buy a brand new one. My question is: Would it be a good idea to buy a verizon iPhone with a cracked screen so that its cheaper, get the screen fixed, and then put it on Straighttalk's service?