zToggle is a patch that allows you to disable the multitasking and wallpapers options in iOS because these 2 functions consume quite a lot of resources once they are activated. zToggle allowed the activation/deactivation of these 2 functions on the iPhone 3G and iPod Touch 2G because these 2 devices did not have them natively activated, Apple refusing to implement them in the 2 terminals as well due to the insufficiently powerful hardware configuration. Now zToggle has been updated to version 3.0 and is compatible with iPhone 3GS/4, so how can you disable multitasking and wallpapers if you think they require too much resources when they are active.
I have not yet felt the need to disable the multitasking function on my 3GS and I don't think I will ever disable it because the iPhone 3GS has enough RAM to keep applications open in the background. zToggle can be installed for free from Cydia.
