While apple release the iphone update 2.2, you may want to hold on until you see there are no bugs. For those of you, like me, that update to the new version but would like to go back to 2.1. I put together a step by step video so you can do this, check the video below and let me know if it worked for you.
Once you are done it will bring the iphone back to version 2.1. You can use the latest version of itunes to do this. You will also need the 2.1 Firmware which is found below, and QuickPWN 2.1 so you can activate the 2.1 version once completed.
First download the 2.1 firmware by CLICKING HERE . Save it to a place you will remember then open iTunes, connect your iphone 3G and while pressing the shift key click on the restore button in iTunes. This will bring up a window that will let you look for the firmware you downloaded. You will also need QuickPWN which you can download by CLICKING HERE if the link fails try this one CLICKING HERE
This tutorial video below is for the iPhone 3G, but it will work for the 1st generation iPhone if you use the firmware below.
If you have the First generation iphone (The Old one) then CLICK HERE for the firmware that works on that model. You might also need the bootloaders 3.9 and 4.6 you can download them by clicking on the following links. 3.9 Bootloader 4.6 Bootloader