If you're traveling, you can use the iPhone 3G as a modem. They establish the connection via Bluetooth. Ask However, if your mobile carrier charges for calls.
You can use the iPhone 3G as a modem when you have been playing by the latest software update. You have the option of the iPhone 3G via USB or using the Bluetooth interface to use as a hotspot. The prerequisite is that the phone has mobile access to the Internet.
The computer via Bluetooth with the iPhone 3G connect
Turn your iPhone and open the app "settings".
Open the item "personal hotspot".
Select that you want to connect the computer via Bluetooth.
Activate Bluetooth on your iPhone 3G if you have turned on the interface is not permanent. Also turn the external device is ready to view.
The devices are not coupled together, you should do this now. A coupling is done only once.
If the computer is connected to the iPhone, you can use the iPhone 3G as a modem.
The iPhone 3G as a modem via USB
Connect the iPhone 3G via USB to your computer.
Open the network settings and select the iPhone 3G as a modem.
Link the units together. Now you can use the iPhone 3G as a modem to your computer.
If you have setup the connection again, it should always be available to you if you hold the iPhone again via USB to the computer.
Before you use your iPhone 3G as a modem, you should check with your service provider if you have to pay for fees. Often the mobile Internet access linked to the use of mobile phones and it costs extra if you use this as a modem.