My phone doesn't had a network connection and as well as bluetooth connection

then unplug your phone and connect your phone via bluetooth to your computer and use bluetooth dial up networking........

Have you "enabled" the BlueTooth support on the Nokia?
Have you "enabled" the BlueTooth support on your laptop?
Do you get a prompt on the laptop (or the Nokia) requesting permission to connect to the BlueTooth network?

P.S. Look for a 'Fn Lock' key on the laptop. Press it to make all the other 'Fn' keys work.

Follow the below mentioned steps : 1. Connect the Samsung cell phone and computer. If you are connecting via USB, connect one end of the USB cable to your Samsung phone and the other end to your computer. It may take a few seconds for the proper drivers for the Samsung phone to install. If pairing via Bluetooth, make sure Bluetooth is enabled on your Samsung phone and start a search for devices on your Bluetooth-enabled computer by right-clicking the Bluetooth icon in your taskbar.
2 Launch Internet Sharing, found in the Start menu on your Samsung cell phone. Open the application.
3 Configure Internet Sharing. The status menu should read "Disconnected." Under the PC Connection setting, select the method you will use to connect your cell phone to the computer--USB and Bluetooth PAN are the choices. You shouldn't need to change anything under Network Connection, unless a network other than is showing on the display.
4 Start the Internet Sharing connection. On your Samsung device, press the Connect soft key. It may take up to 30 seconds for the connection to be negotiated, during which the status line may say "Check USB cable connection"; this is normal.
5 Connect the computer to the Internet sharing phone. If your computer and phone are paired via USB, no further pairing is needed. You will see the shared Internet connection as a wired connection in your Network and Sharing control panel on the computer. If you are connected to the Internet Sharing application via a Bluetooth personal area network, the computer must be synced to the phone. Right-click on the Bluetooth icon in the taskbar and select "Connect to a PAN" or similar, based on the version of Windows you are using. A list of all Bluetooth PAN connections within range is shown; select your Samsung phone. The PAN connection will be negotiated, and the Internet connection will be shared.

bluetooth does not connect to the internet, it connects to other bluetooth devices such as bluetooth mobile phones.
the network cable shows unplugged if there is no cable plugged into it and going into your internet router

• Connect the Samsung cell phone and computer. If you are connecting via USB, connect one end of the USB cable to your Samsung phone and the other end to your computer. It may take a few seconds for the proper drivers for the AT&T Samsung phone to install. If pairing via Bluetooth, make sure Bluetooth is enabled on your Samsung phone and start a search for devices on your Bluetooth-enabled computer by right-clicking the Bluetooth icon in your taskbar.
• Launch Internet Sharing, found in the Start menu on your AT&T Samsung cell phone. Open the application.
• Configure Internet Sharing. The status menu should read "Disconnected." Under the PC Connection setting, select the method you will use to connect your cell phone to the computer--USB and Bluetooth PAN are the choices. You shouldn't need to change anything under Network Connection, unless a network other than AT&T is showing on the display.
• Start the Internet Sharing connection. On your AT&T Samsung device, press the Connect soft key. It may take up to 30 seconds for the connection to be negotiated, during which the status line may say "Check USB cable connection"; this is normal.
• Connect the computer to the Internet sharing phone. If your computer and phone are paired via USB, no further pairing is needed. You will see the shared Internet connection as a wired connection in your Network and Sharing control panel on the computer. If you are connected to the Internet Sharing application via a Bluetooth personal area network, the computer must be synced to the phone. Right-click on the Bluetooth icon in the taskbar and select "Connect to a PAN" or similar, based on the version of Windows you are using. A list of all Bluetooth PAN connections within range is shown; select your AT&T Samsung phone. The PAN connection will be negotiated, and the Internet connection will be shared.

If your Mac has Bluetooth, you can connect to the phone via a bluetooth connection and use it as a modem. You first need a connection profile on the phone that will allow an IP connection (data) to your phone network, either via 3G or GPRS, though the former is potentially faster.

Then you need to Go into system preferences->Network on your Mac and create a Bluetooth connection profile that may need a user name and password to connect to your phone networks data access point.

Then select the IP profile on the phone, turn Bluetooth on. Turn on Bluetooth on the Mac and select the Bluetooth connection profile in Network on the Mac and click on the connect button, it should then connect and away you go

Using your cell phone as a modem is perhaps the most overlooked of all Internet connection options. But a mobile phone Internet connection, whether as a tethered modem or, using bluetooth, a wireless cell phone Internet connection, is easy to set up, and with a laptop and cellphone you can check email and surf the web from anywhere, any time, with the Internet in your pocket!
Here are the basic instructions for creating a mobile phone Internet connection. The instructions are for a cell phone with bluetooth (which most cell phones these days have), but if your cell phone doesn’t have bluetooth you can buy a cable to connect your laptop to your phone from any cell phone accessory provider. Conversely, if your cell phone has bluetooth but your laptop does not, you can buy a small USB device which will enable bluetooth on your computer.

hi!!!!!!!!!
try to configure out first the router!!!!
may be it has network password or security key

bluetooth doesn depend on network connections ... just tell me ur mobile brand and model will clear ur query ...