Before starting, i would like to tell that you need to root your Android phone in order to perform this task.
Now we are going to remove the pre-installed apps found in your phone using an application called Titanium Backup. In order to start, you need to download this application into your Android device. The official Google Play link is here.
Now root your Android device using Universal AndRoot. To know how to root your device, click here to know. After rooting, open the Titanium Backup app and goto Back/Restore tab. There you’ll find all the system apps and user-installed apps. Click on it and you’ll find the options as shown in the image.
Now click on Un-Install. And there you go! Your phone will now be free of space (maybe 10MB maximum) and will apparently perform faster.
You can also use Titanium Backup for backup purposes. Titanium Backup runs on any version of Android and was tested by us on an Samsung Galaxy 5 i5500M running Android 2.2 FroYo.