Download songs to iPhone

Okay I recently had a android Samsung infuse and it broke so I got a iPhone 4S I was wondering if I can search for a song on the Android click it and it will automatically download to my music library can the iPhone do the same thing.

How to activate my Iphone 3gs?

I brought my iphone from Tescos and stayed with a tesco sim card for about 2 years and about 6 months ago i decided to transfer to Orange.

When i transfered to orange i was supposed to unlock my phone. Now i had two options of how to unlock it: 1 - called in Tescos and they said they'll unlock it (send a letter to me of how to unlock it) within 5- 30 days or something similar. My option 2 was to take it to a shop down the street, pay them and have it unlocked in an hour.

I took the second option, and unfortunately received that letter of how to unlock my phone within 2 days and regretted having unlocked it through the shops (because i paid £20)

They also down-dated the phone which made me get NO Notifications of apps like Whatsapp or Kik and that really bothered me.
So yesterday i decided to update it with my laptop (which will remove the unlock) and then i'll phone tescos again to have it unlocked by them even if it would take long.

What happened though was that once i emptied everything from the phone i was unable to activate it. The reason why is it says it's supposed to have a valid sim card on it, though it isn't working in any of my sim cards (Tesco sim AND Orange sim).
So what am i supposed to do?

I brought this phone 3 years ago so the warranty from tesco is over so if i'd need to go to a shop and have them fix it for me should i go to Tesco or the Apple store? (it says "Contact the Apple store if this message keeps showing up")

Why won't my iMessage activate?

I was messing around on my iPhone 4s (iOS 6) and I changed the phone number to my house phone to see what would happen, and then I had sent a text message to a friend and she received it. Then I went back to phone settings and changed it back to my original phone number, and now iMessage won't work!

It's been stuck on "Waiting for activation… " for a while now. Currently, my send button is blue but my messages are green! I'm at a strong wi-fi connection, and I don't know why my phone is doing this. I had tried to reset my network and all that, and yet nothing is happening!

Sprint Iphone 5 sim card slot?

I have the 16 gb iPhone 5 from sprint and i realized that the phone still has the sim card slot. Does this mean that the phone can be unlocked to be used with at&t or t-mobile? Or is it unlocked already?

How to delete everything off iphone? But my laptop broke?

Can I delete everything off my iPhone using another laptop? All my info was originally on my laptop but it's broken so what do i do?

Added (1). Well, i can't actually access my phone because the apple logo pops up and then it turns off and i can't get on the iphone.

Are there any downsides or problems with the the iPhone 5?

I'm getting one for my birthday next month and today my aunt was saying she got the iPhone 4s last week as it is better than the 5 as the 5 has had problems and troubles… I've heard the maps on the new iPhone aren't very good, I don't mind as I wouldn't be using that too much. Is there any problems like glitches or like the problems with the iPhone 4? Or is it just an awesome phone? (I've had the iPhone 3) I understand that this may not make any sense, my cat is sitting on my back, I jusst painted my nails and I don't know how to rephrase any of this!