Why does my iphone have no sound?

So I got my iphone 5 in December and have not had any issues with it until now. Sometimes when I go to play a song go on youtube ( or any other video site) or play a game no sound will be their. If I reset my phone the sound comes back so I know it's not the speakers or headphones I'm using. Just wondering if anyone else is having the same issue and if they know how to fix it. Would I need to get it repaired through apple my warranty is still in tact?

IPad mini or iPhone purchase?

My hp laptop is fried and my old Android phone needs replaced. Funds are short presently, so I'm trying to replace both as economically as possible.

iPad mini 16gb Wi-Fi only. NO monthly bills
iPhone4s 16gb from Virgin Mobile. $55/month unlimited everything

The iPad mini is $330 and the iPhone is $380 on sale plus $55/month

Which option should I go with and why? I fear not having text/call option on the ipad, but there are Aps I can do that through, right?

I figure with all the iPad bluetooth devices and AppleTV, I can easily connect either device to my TV if I need a bigger screen. I've graduated college and really only need basic computer functions to find a job.

My iPhone is stuck in Pwned DFU Mode. URGENT

I was just trying out the Pwned DFU Mode prior to the normal DFU. So once I successfully entered PWNED DFU Mode, I 'got out of it' and the apple logo came out. Since my iPhone was tethered jailbroken, I had to click just boot. And the apple logo would just stay there until I did the tethered just boot option.So, my iPhone screen was at the apple logo and I tried to enter DFU mode normally, the thing got back to PWNED DFU mode… Urgent reply!

IPhone stuck and keeps resetting?

I seriously have had it with this iPhone. (iPhone 4s) I've purchased it 2 Decembers ago months after it came out. 2 months ago it has the weird problem out of know where. So I've heard of people's phone battery's stuck or it keeps restarting but oh no! Mines got the double whammy! So some days since I don't know what battery I have it will die. Doesn't show when it's gonna die so it just does. Then I plug it in and it turns back on immediately. Then 3 minutes later it resets. Over and over again. It will do it all night! But when I unplug it, it does it for about an hour. Then it stops. Also I noticed when I'm typing something or something else it freezes sometimes. Like the phone can't keep up with me anymore. I've restored it many times already (started as new iphone) and had the screens replaced not by apple but that should affect it. It has been perfectly fine after I had them replaced(about 8 months ago) and when I do the reset by holding the home and off button together it's still the same and then goes back to resetting over and over again for about an hour. So now in just stuck. I bet apple will not replace it if its already been replaced by an aftermarket store. My upgrade isn't coming up any soon either. Just wanted to see if there's anymore answers out there