When DUN is on, you cannot pair with another device or discover another device. You can also not send or receive information wirelessly directly from your smartphone, browse the web, or send or receive email messages. You can use all the other features of your smartphone, including the Phone application.
Keeping DUN enabled drains your smartphone’s battery quickly. Be sure to turn off DUN on your smartphone when your Internet session is finished.
You can also plug your smartphone into your computer’s USB port to charge your device while you use it as a modem.
Enabling DUN on your smartphone
You must enable DUN on your smartphone each time you wish to use your phone as a wireless modem.
1.Go to Applications 
and select Bluetooth 
.
2.Select the
DUN icon 
appears.
3.Select OK on the warning screen that appears. This screen reminds you to disable DUN when you want to stop the Internet session on your computer.
Accessing the Internet from your computer
The steps for accessing the Internet on your computer may vary depending on your operating system and how Bluetooth wireless technology is set up on your computer— for example, if it is built in versus if you are using a wireless Bluetooth adapter. If the following procedure does not work with your computer, check your computer’s documentation for how to set up Bluetooth technology to access the Internet using a DUN connection.
Before you begin, verify that DUN is enabled on both your computer and your smartphone.
1.Open the Bluetooth panel on your computer and look for the option for paired devices. Check your computer’s documentation for how to bring up this screen and the name of the paired devices option.
2.
3.