IPhone 4s randomly shuts off?

I've had my phone for almost a year. Every morning I have to power on/off because my dock station causes a glitch on my phone to where the sound level is always full and the icon never goes away. I don't know if this has anything to do with it, but whatever.
Anyways, my phone is always shut off but if I press the Sleep button a thousand times the home screen will appear but after I use my phone for a bit, it shuts off again.
What is causing this? Can I fix this with an easier way than a restore?
Or do I have to get a new phone entirely… Because it's happening more and more often.

Where can I get an iPhone 5 charging cable?

Where can I get an iPhone 5 charging cable? Nobody has them in stock. Not the Apple, Sprint, At&t, t-mobile, or any other store seems to be able to get them in stock. My dog destroyed my old one and now I havn't been able to charge my iPhone in a week and it's getting a little annoying that noone ever seems to get them in. I need to find a store that has them regularly in stock as soon as possible. Any thoughts on places that have them that I havn't looked?

How to prevent iPhone calendar from syncing with exchange email?

I have my work email (exchange account) on my iPhone's mail account list. When I add an event to my calendar on the phone I also see it on my exchange calendar. I don't want this. This is my personal calendar, not work. How can I prevent the calendar from syncing?

My jailbreak isn't working anymore?

I have an iphone 4 with iOS6. Last night i used redsn0w to jail break it. It is a tethered jailbreak. I was getting everything i wanted but then it stopped working. Any tips?

Should I delete messages on my iPhone?

I'm just curious if having messages that can read back to the date I bought my iphone will slow it down? I know they archive after a certain number of messages but do I need to delete the old messages?

What is the best app in the IOS app store to edit photos?

I need to do resizing, cropping and some visual exposure effects. I would like to be able to use the app in both my iphone and my ipod touch. So any suggestions about which app is contains most functions but is simple at the same time. I don't bother whether the app is free or paid