One of the big reasons to jailbreak your iPhone is the Winterboard themes that can make your iPhone your own!
If you were drooling over the new iPhone OS 4.0 features and the new look with the dock and icons, you can have it right now as long as your iPhone is jailbroken.
iPhone OS 4.0 winterboard theme makes your 3.x firmware iPhone look like iPhone OS 4.0. It sports the new theme background, wallpapers for lock screen and home screen, a new dock, etc.
How to Install iPhone OS 4.0 Theme?
- Your device must be jailbroken.
- You must have Winterboard installed via Cydia.
- You must have ModMyi Repository added to Cydia.
- Search for iPhone OS 4.0 in Cydia and install it.
- Launch Winterboard and activate iPhone OS 4.0.
Screenshots
You can also search and download OS 4.0 Calendar icon from Cydia to match this.
I have my iPhone 3GS decked out ProSwitcher for multitasking, SBSettings for easy settings toggles and Categories for folders.
Don’t forget to check out our collection of our favorite iPhone Winterboard Themes.

