Why doesn't my iphone work when i call people?

When I call people on my iphone without speaker, I hear nothing at all from the person or the dial tone. When I have it on speaker, it works perfectly fine. I just bought this iphone 3 weeks ago and I didn't drop it. What's wrong with my iphone?

Added (1). It's an iphone 4 and I've just updated it. I'll give it time to update and see if it works.

I don't know, but why don't you send it to me and I'll test it for you?

What iphone is it? You may have just got a defective one. However there was at one point an issue like this but it was fixed with an update. Do you have the latest update? You can always bring it to where you purchased it or go to apple store and have it looked at.

Definitely weird, is your headset plugged in? Bad headset? Its new so take it back and they will replace it if its defective for some reason.

The ear piece speaker thing doesn't work. Probably broken.

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