If you are using AT&T Samsung Captivate and want to Root this device you are on a right place below you can see a guide for this purpose below you can see step-by-step guide. Before you get started make sure that you have manage your back-up because below steps can damage your valued data so, follow all the steps at your own risk.
DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or get damaged following this guide.
First of all you need to use a USB Cable to connect your device to PC and Pull down your notifications bar and click on “USB connected: Select to copy files to/from your PC.” Tap “Mount”
Your desktop PC phone may install the new USB device using the drivers you downloaded and installed previously. It should then show you some auto-play options. click “Open folder to view files.”
Drag update.zip into the Captivate USB drive and wait for the file to copy successfully and simply and Turn Off your device.
Hold down the Volume-Up/Down rocker and press the power button. Your phone should boot into recovery mode.
In recovery mode, press the volume-down button to scroll down to “Reinstall packages”.
Press the power button to select that option
Follow the on-screen instructions, and you should be all done…