Calling people on my iphone 4?

I called my friend today with my recently upgraded iphone4. My friend said that my number showed as an unknown caller, and that it was set to private or something. I think this has something to do with me upgrading phones (i did not change my number) What's going on and how did this happen?

How to get the music on my iPhone to play in my car?

I have a 2002 Gran Prix and an iPhone 4S. I want to play the music on my phone in my car. I look and my radio has no USB, or additional spots to plug anything in besides the part where the lighter is. Does anyone know what I can do or buy?

How do get started on the Iphone 5?

I'm getting the Iphone 5 for my birthday and I really have no idea how to use it. My last phone was an Android so obviously i'm more use to those type of phones. Its my first time having an iphone & I just want help on how to get started. Like how do I download music from the internet.

Do i need a brand new sim card for iphone?

I recently bought a used, iphone 4s from ebay and it has arrived.
do i need to buy a totally new sim card for it? (i haven't opened the box yet, until christmas) or can i use the same one i used for my samsung?
does apple have special sim cards that you need to buy for your iphone version?

League of Legends Iphone 4 Cases?

I've been looking everywhere and I can't seem to find anywhere that sells iphone 4 cases for the LoL champs I need. I want one for Gragas, Ryze, or Ziggs. Preferably Ziggs. Jinx was useless, same with amazon. If anyone has a link to somewhere where I can find these specifically thatd be great!