When iOS 4.2 was launched by Apple, they gave their users the option of changing the font style but only for Notes App. Thus users were always demanding more control over changing font option.
FontSwap is a dedicated Jailbreak tweak that allow iDevice users to swap the complete system fonts with an alternate one. The latest version of FontSwap (v 2.0.3) provides lot of improvements and some minor tweaks, plus it has now integrated an improved support for the latest iOS 4.3.
FontSwap allow users to change fonts on their iPad/iPhone/iPod Touch very easily and quickly. Once installed, FontSwap has a built-in archive that allows you to choose a font as per your liking. It basically swaps the system fonts that you iOS device displays but do keep in mind that this particular Jailbreak tweak won’t change the appearance of your iDevice user-interface.
So if you are tired of seeing the same old fonts on your iPhone then search for FontSwap from Cydia store and install this package for free, giving a new look to your iDevice.