Iphone 5 stuck on apple logo?

I tried putting it in recovery mode and restoring twice but keep getting this error: iphone can't be restored device can't be found.

Accidently clicked follow on someone's twitter profile - will they know?

Hi, this may sound stupid, but please bear with me.
I was having a look at some people's profile on twitter who I went to school with. I found someone that used to make my life hell but was a little intrigued as to what they were up to. I was looking at their profile on my iphone and accidently clicked "follow" then immediately clicked "unfollow". Will they have received a notification of this or was it too quick to have registered? It was literally straight after I pressed follow that i unfollowed.

IPhone contract problems/Vodafone?

I got my iPhone 5 on the 9th November and I was currently on a contract before with my iPhone 4S. I received a new SIM card for my iPhone 5 but I'm keeping the same number to my iPhone 4S it had now been two days and my iPhone 5 still says no service. I went in on the 9th November to ask why this was and they said it would only be 24 hours. Has anyone had this problem before and then it starts working?

Does restore backup replace what's already in my iOS device?

I backed up my iPhone and I'm going to restore backup on my new iPad because I want to move some things to it so I could continue. But will it erase the content in my iPad.

Added (1). I mean that the apps or everything else I already have in IPad will be erased if I restore backup.

My iphone 4s won't sync my music from my phone?

They are both updated to the newest software but for some reason it won't sync, I'm thinking it might have something to do with the fact that I was in a rush to get out of class the other day and so I quickly cancelled the sync whilst it was syncing and unplugged my phone… Can anyone help!

Added (1). I have downloaded new music on itunes on my mac and I want to put it on my iphone but its not transferring. It says it is but then when the sync is complete there's no music

IPhone 4s can't swipe to unlock?

I have tried shutting down but my iPhone is not responding to it too. The camera application beside the "swipe to unlock" is not responding too. What should I do?

IPhone5s store pick up - different person?

I'm in a different country but my friend is in USA now and I want him to buy me an iPhone5S. I gave him my credit card, so he has my credit card right now.

Since the stocks for iPhone5S are still short, I want to use store pick up option. Here is what I want to do.

1. I'm going to use my credit card info and purchase an iPhone5S online.
2. I will select store pick up option and choose a store with available stock.
3. Then my friend will go to that Apple store with my (physical) credit card and pick up the phone.

Is this possible? Is my credit card enough to pick up the phone? Or is a photo-ID necessary for pick up an iphone?