How to tell if a iPhone is unlocked?

Okay I bought a iPhone 4s from someone who said it was unlocked but how will I know? Do I just put my sim card in it from my virgin mobile blackberry and see if it works? Or do I need to like do something else?

Can't sign into Ebay. Support email?

Been trying for weeks to sign into my ebay account. I can't, and their tech support never replied (It's been so long I don't even remember who, or how I contacted them).

I've reset my password, and done everything I can think of. Basically, I enter my details, and it just stays on the login screen. If I enter the WRONG details, it says it's incorrect. If I enter what I'm 99% sure is correct, it gives me no error message - just clears all fields and I have to try again.

I have the same problem on my Mac, and my iPhone App. (The app actually gave me more info. It said I was suspended? Can't imagine why. But It didn't give me any way to contact them about it).

Anyone able to help me trouble shoot this?

Does anyone have a support email/webpage for them? I NEED to log in.

Can I switch my Android for an iPhone?

We're with the Sprint phone company. I have an Android Photon 4g and my mother said it cost about $500 but because she has insurance or something like that, it went down about $200, we're going to the Sprint store tomorrow because the phone is giving me problems and the phone is still on insurance. I just want to know if I can switch this phone for an iPhone 4s because I'm tired of it giving me problems everyday.

How to get free music on iphone?

I have an iphone 4 and i want music on it. I have a computer with no music on it.
how do i get music for free on my iphone 4? Without an app, i want it in my music library like it would be if i bought it from itunes.

Can I unlock an iPhone 4 by jailbreaking it?

I want to get an iPhone 4 but don't want cell service. Can I jailbreak it to get it to work with out having to activate it every time?

Added (1). Is there any free ways to unlock?

I lost my iPhone and I need my contacts?

I lost my iPhone 4S few days ago, is there any way to get its contacts back? I'm using another iPhone right now so I suppose I could sync it with iTunes. But, the problem is that someone else in my family used the iTunes instead so the files inside (I supposed) is her's? Or can I still get the contacts back?