Check the instruction manual of your mobile phone to see the specific ways to change the wallpaper.

Go to the graphics area of your mobile phone instructions and pull up the wallpaper samples. Search through the included pictures and select the one you like.

Take the example of the Samsung phone using AT&T service. It directs you to "Settings," "Set Display" and then "Wallpaper."

Save a picture on your mobile phone that you have taken of friends or family. Select this picture when you are surfing through your phone as a wallpaper option.

Email pictures to your phone if you have taken them with another digital camera or you have selected a scanned image. This is only applicable if you have your phone set up to accept email.

If your computer has a USB port you can get a device that enables your computer for bluetooth. Here's one device: Kensington Bluetooth 2.0 USB Adapter. It'll allow you to connect your computer to your phone via bluetooth and send pics, songs, movies. However you have to make sure that Sprint didnt lock the bluetooth capabilities on their phones. I know Verizon did and they got sued for it. With Verizon you can only link up to bluetooth earpieces. Ask a Sprint rep if they have restrictions on their bluetooth phones..