Cydia apps to make iPhone 3G faster on iOS 4.2.1

All the below mentioned apps are present in Cydia

1. Speed Intensifier

Speed intensifier removes the animation on launching an app or folder that come with original iOS firmware from Apple. What this little does is remove the animated graphics whenever one opens a folder/app.

For best performance select the infinity symbol. Respring yout iPhone and feel how fast your iPhone 3G has gotten!!!

Ztoggle- Background wallpaper and Multitasking for iPhone 3G

Ztoggle

Ztoogle is Cydia tweak that enables special features of iOS 4 on older iPhone and iPod touches that have been abandoned by Apple. Also Ztoggle brings some tweak on latest iPhone 4 model as well.

iFile 1.4 review

iFile is an essential tool to any developer or themer who works on their iPhone as it gives access to the filesystem with very few restraints. It has recently been updated, adding full compatibility with iPhone OS 3.x, and there were also a few “new” features thrown in for good measure.

How to enter DFU mode?

What is iPhone DFU mode?

DFU mode is a state that you can put your iPhone into where it can interface with iTunes but does not load the iPhone operating system or boot loader (this is what really differs DFU mode from recovery mode). DFU stands for Device Firmware Update.