ITunes keeps crashing on iphone 4?

I have an iphone 4 and it was working perfectly fine. Itunes was ok, it was working. I was downloading songs. Weeks after, once I open itunes on my phone, it shows the search screen then seconds later it crashes. I have the latest update of itunes on my windows computer and phone. I have the ios 7 update. I bought songs in the ios 7 so it should be working properly but it crashes. I tried deleting my cookies but itunes still doesn't work.

Would be a bad idea to buy the iphone 4 now?

I can't afford the iphon 5/s, but I did initially want the a samsung galaxy first. Anyway, I like to watch movies, listen to music and generally surf the web a lot. I also like to download a lot of apps and take pictures. Would the iphone4 be significantly inadequate now.
If it helps I'm 18 and my parents can't afford and think it's morally incorrect to get me a iphone 5/s, but I'm not complaining.

IPhone back cracked without dropping it?

So my friends claims she was just using her phone when suddenly she heard a crack and there was a huge line through the back of glass of her iphone. I don't think she had it in the charger and she hasn't got a case on it. She has a white iPhone 4S relatively new but she's gets a new back to it tomorrow. I was just intererested. It may have overheated?

Wi-Fi keeps cutting off what should i do?

It's also messing up for my brother's iphone that's connected to Wi-Fi.our internet connection works at the same time and when the Wi-Fi messes up for me, his is messed up. So i'm assuming something is wrong with the router. Most of the day the Wi-Fi doesn't cut on, then when the Wi-Fi comes on it only works for maybe half an hour and then goes out again. I unplugged the cord for the power and only the lights for the telephone and online went out. The lights for the battery and Wi-Fi were still on. What can I unplug to make all the lights on the router to shut off so I can restart it and the Wi-Fi works. Because the laptops internet works, it's just the hand held devices that don't work.

Schedule for iPhone IOS7 Bluetooth?

When I use my car I either forget to turn on Bluetooth or forget to turn it off again. Is there an app that can set a schedule for Bluetooth to turn on and off?