Should I keep my iPhone 4s or get an iPhone 5s?

In all honesty I don't really want a new phone. I've had my iPhone 4S for about 2 years, but it is a 32g and I don't have anymore gigabytes available on my phone. I kind of think it would be wasting my money on an iPhone 5s because I don't think there's a big difference between the two phones, but I want 64g on my phone. Could someone please tell me their thoughts on the situation? I would really appreciate it!

My iPhone vibrates when it's off?

Now I have felt a random vibration a couple of times while I have just been lying on my bed. I normally have my iPhone on my bed in case I get a text, but one day while I was on my laptop, I felt a random vibration under my pillow a couple of times. I checked my iPhone, but it was actually turned off. But when I turned it on I had a notification so that was weird. Then today while I was lying on my stomach I felt another vibration underneath me, and checked my iPhone again, same thing happened. It was turned off but when I turned it on I had the same notification. So if this isn't my iPhone vibrating I have no idea what else it could be.

How much would an iPhone on its own cost?

So I live in Melbourne, and I was wondering how much does an iPhone cost on it's on? I already I have a SIM card ready and everything, I just need the phone. (3GS, iPhone4 /or/ 5 I don't care which one)
I was also wondering where I could get one? (Other than going to an Apple store)

How to add free music to you iPhone?

I just got my iPhone and don't know how to download music I need some free songs because if I buy all them songs I will go bankrupt I love music so please help and thanks

How to get on my broke iphone one last time?

My iphone 4s is cracked the the touch screen thats broke won't let me unlock it to get numbers that i need. I tried itunes but it said I need to unlock it which I can't do. Can anyone help?

My IOS 7 jailbreak randomly stopped working?

I have an iphone 5 and when I first got it I jailbroke it so I'm familiar with the process. I recently jailbroke my iphone 5 running ios 7 because I'm a huge fan of jailbreaking, and it seemed to go great at first. All the compatible tweaks worked and showed up in the settings. Then all of a sudden my iphone resprung and nothing worked anymore. The only tweak that seems to be working is flux. The cydia icon is still there and allows me to download tweaks and respring, but nothing works and nothing shows up in the settings! I've tried to restore and rejailbreak and the same thing happened again!

How to change my iPhones IP address?

So I got blocked from a website for virtually no reason, I try to get back on it, make a new account, etc. But it won't even let me get to the home page. My iPhone keeps saying that the server stopped responding. I heard that changing my IP address or getting a VPN or proxy might work but I haven't had any luck.