Switching iPhone 4 from AT&T to Verison?

I have an iPhone 4 from AT&T and replaced with new iPhone 5. I have a friend that is with Verison, wondering if I can give her my old iPhone and can she use it with her plan?

Account not in this store message after updating IOS 6?

Since I update my iPhone 4 to IOS 6, I get a message that says with the heading "account not in this store".It then says:
"Your account is not valid for use in the Canadian store. You must switch to the US Store before purchasing."
However, I live in Canada and I don't want to be in the US Store because than my giftcards that were purchased won't work. How do I make my account valid for the Canadian store. I used the Canadian store before I updated. Any Ideas or advice from smart people?

I can't turn my iPhone on. It's not dead and I have a broken lock button?

My iPhone 4 shut off last night. Thinking it just died, I went and plugged it in. I came back a few hours later but it still wasn't coming on. I left it plugged in all night and checked it again this morning but it still wasn't on. My lock/sleep button is broken so I can't reboot it. I've tried plugging it in to my computer but my computer won't even recognize that I've plugged it in. I've run out of things to do. Anyone have any suggestions? Besides calling Apple? =/

Can My iPhone Get a Virus From an App?

I downloaded and app called MyMedia, which is what I use for my music. I use mp3skull.com to download music onto the app. One of the songs I downloaded wasn't the song, it made the sound of like windows shutting down so I deleted it right away. I still use the app and have downloaded many other songs, but occasionally (not while using the app), my phone shuts down. It turns itself back on and that's it. But when I previously downloaded from that website the same thing happened on my computer and my computer has a virus now. Is it possible that my phone has a virus and may shut down completely?

Where can I watch free Disney movies on my mobile?

Okay so I've really wanted to watch Disney movies A LOT lately but I really don't wanna have to pay for them. I can't find a good website on my mobile for this, and it's really frustrating. You tube sucks so that's out is there any site where I can watch Disney movies free on my iPhone?

Should I put music on my iphone?

I just got an iPhone 4S with 16 GBs. I'm debating on putting all the music from my iPod (about 950 songs) on my phone. I'm not sure how much room it will take up and if it will make my phone slower