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?

This should not happen after a software update.

Checking the following setting should help:

Settings --> Phone --> Show My Caller ID and ensure that this is set to ON.

  • Why are people calling me a spoiled brat? So last Christmas here was my Christmas list: A MacBook pro computer New clothes Ugh boots An iPhone 5 A Samsung galaxy note tablet a $200 gift card A Xbox This is what I got instead: A new pair of socks Two candy canes A proscan tablet A $50 gift card Converse shoes A sweater And a braclet They always get the opposite of what I want! God my parents are so selfish! They make LOTS of money. My dad is a lawyer and my mom is a Pharmacist. My cheap *** parents.
  • Why am I receiving calls and texts from people thinking they're calling someone else? I've had this phone for about 5 months. It's an iPhone 5. I'm getting texts as though they are actually in action texting someone else. Constant responses but no replies from … Show more
  • People of all ages: Did people born in 1990 grow up with iPhones? Explain why or why not. The first iPhone was released in 2007. BQ: What year were you born in and did you grow up with iPhones.
  • People keep calling me and I don't know who they are? I have a iphone 4 and I keep getting calls from people saying that I called them first, and I know didn't, their numbers aren't even in my recents. Today I got a call from a random saying to stop calling her and thought I was a telemarketer… How can I make this stop? And how did this even happen?