IOS 7.01 problems? This accessory may not be supported?

Just updated to 7.01 Today, however I have been having an annoying problem. I always get the message "this accessory may not be supported" and my iPhone vibrates constantly. My iPhone also won't charge at all it's stuck at 98%. What do I do?

Buying an iphone but don't know where so

Ok so I saw that the iphone 5 at walmart is at 549$ great deal and i don't know how much it is at apple but I wonder is how much credit would they give me for my iphone 4 perfect conditions not cracked at walmart or either apple please help!

How the hell do I start credit?

No idea how to do it and looks confusing. Wanted to buy an iphone 5s but it required a $500 deposit. What the hell, I had enough to buy the phone and start the activation but what's up with paying half a thousand dollars. I couldn't even get a best buy card cause I lack having any credit.

How do I start it and get it fast? What do I have to do?

How to turn iphone shutter sound off?

I recently just got a iPhone 5 from Amazon and I can't seem to turn off my shutter sound. I put all the volumes on silent and nothing. Is it just my phone or does that happen to everyone. Should I exchange it for a new one?

Can iPhone Otterbox Holsters Come Off?

If I buy an iPhone 5s otterbox case with the holster, does the holster clip off the case also so the phone can just have the otterbox case, no holster also?

Added (1). I know it should be common sense! I don't know phones so I'm just getting the holster too.