I have iPhone 3GS , you mean to say I can't use face time also I can't connect with television

You can't, the hardware doesn't support it. For one thing, it doesn't have a forward facing camera.

FaceTime is not on the iPhone 3GS because it does not have a front-facing camera. Think about it - if you wanted to use the camera, you'd have to turn the phone around - but then you wouldn't be able to see the other person.

FaceTime is on iPod touch 4th Gen, iPhone 4, iPhone 4S, iPad 2 and The New iPad.

well if you just want to show photos on the big screen it is possible but just with music, photos. You need ios 4.3 or newer and Apple TV. For Airplay mirroring, it is only for the devices that have enough power for that, ipad 2 and the new one, iphone 4S

For air play, the hardware is not powerful enough for it.

Yes, i already said that, but you cannot use iphone 3gswith television