Back Up Your Mobile Phone Contacts Via Bluetooth

It all depends on which mobile phone you have. There are some, which cannot be backed up, and others that are easy.

Steps

Install your Bluetooth hardware and its drivers. Download the latest versions if necessary.
Install the software provided by the mobile phone manufacturer. If you don't have a CD, you can download it easily from the Internet. Make sure you know the manufacturer and model number of your mobile phone to make your job easier. Here are some of the brand names and their PC Suite software.
Switch on Bluetooth on your mobile phone and make sure that it can be seen by other devices.
In Windows 7 you can open your Bluetooth by simply right-clicking on the bluetooth icon on the task bar. If you are using Windows XP, click on your start menu, go to control panel, then Bluetooth devices.
Click on Add device and after it finishes the search, select your mobile phone.
It might ask you for a passcode. Here, you can select any one of the options in the list. You can proceed without a passcode, if wished.
If you have decided to use a passcode, enter the same code on your mobile when asked.
Once this is finished, you have successfully paired your computer and phone.
Run the mobile phone software you installed. Depending on the software, you will see options to either back your phone up or synchronize it.

Make sure your phone supports Bluetooth.
Always download the latest versions of drivers and software. It makes everything much easier.
Bluetooth range is limited, so ensure the phone is not far away from the computer.
Most lower end phone models offer no connectivity at all. Avoid these if you plan to connect it to your computer.
Make sure Bluetooth is enabled on your computer.
If you plan to use a passcode, remember what it is during the procedure.