It does, but you are not able to send any files or photos.
You may connect to Headphones or a Wireless device.
yes
The iPhone 3G has Bluetooth and so will the 3Gs model too. I do not know if the 2G model does though.
No you cant, games can not be sent via bluetooth between iOS devices.
yes, there is and you should note that apple gives you details how to run all the bluetooth properly, but not all of the bluetooth works right with iphone 4, occasionally you buy a bluetooth add-on and it is for the iphone 3G or for the iphone 2 or 1.
I have a 3G iphone with ios 4 and it didn't work on it
Yes. if its Iphone 3G, then you should be supported by Softbank or Docomo 3G Iphone 2, dont work..
yes
There is a small chance you have no enabled 3G. To do this follow these steps. Go to Settings > General > Network and Enable 3G should be set to on. Also your area may not have 3G capabilities. In this case there is no 3G signal for 3G to work. To check 3G coverage contact your provider. Also if your iPhone is a 1st Generation and not the iPhone 3G you do not have 3G capabilities.
If you aren't getting any internet access whatsoever, then you should make sure the iPhone has been activated with AT&T. If you are only getting a connection through "Edge" (the letter E will appear in the top bar), then you are either not in an area that has 3G available or it is simply disabled. To make sure you have 3G enabled, go to Settings > General > Network. If the "enable 3G" button is off, turn it on. If it IS on, but you aren't getting 3G coverage in places you normally do, I would contact AT&T.
yes, but you have to have swag also.
Bluetooth works with anything that can receive Bluetooth, so yes, it does work with an iPhone
it just wont work