How to Update My Sprint Curve to 4.5

1). Download the BlackBerry 4.5 operating system from the Sprint Nextel website to your computer.
2). Turn on your BlackBerry Curve. Connect it to your computer using the USB cable that came with your BlackBerry.
3). Start the BlackBerry Desktop Manager on your computer. Click "Application Loader" on the BlackBerry Desktop Manager main screen.
4). Click "Start" under the "Update Software" heading. Select the BlackBerry 4.5 operating system on the next screen and click "Next." Click "Finish" on the following screen to start the installation process. Disconnect your BlackBerry Curve when you see the pop up message confirming that the software installation is complete.