Finally, a whole year after Gingerbread was announced and released on the Nexus S, older devices are finally getting the official upgrades. If you are the owner of a Spring Epic 4G (part of the Samsung Galaxy S family of devices), we have a treat for you today: the official upgrade has leaked and you can install it right now.

If you are one of those people who gets worried about installing new OS updates on their phone, we can assure you this is safe. This file is exactly the same as the one you’d get if you waited for the over-the-air update to come, only you don’t have to wait. If you want to get some fancy new features on your phone like the new keyboard, improved copy/paste functionality, and the newest version of Samsung’s TouchWhiz user interface, follow along for instructions.

How to Update Your Epic 4G to GingerbreadFirst, download the official update file from Google. This link is straight to Google’s servers, so you know that it’s legit. Then, change the name of the downloaded file to update.zip. If you see the downloaded file without a .zip extension, you might have file extensions turned off on your PC. If that’s the case, make sure you just call it “update” or else it will actually be called “update.zip.zip”

Next, hook up your Epic 4G to your computer via USB and mount the SDCard per the usual process. Copy the update.zip file that you downloaded to the root folder of your phone’s SD Card.

Once the file has been copied, shut down your phone by holding down the power button and selecting “Shut Down,” and then turn it back on while holding down both the Volume Down and Camera button. Your phone should boot up and the update should run itself. Sit back, relax, and wait for your phone to update.

Once it’s done, your phone should reboot and you should be all good to go in Gingerbread! Enjoy your new phone OS.