From version 1.6 1click root system does not work if your Smartphone is in any previous version skip to item 3.2 below.
I updated my phone to version 1.6 to decide where I wanted it a little more, and from this version is a little more complicated to obtain root privileges and can install modified versions of Android such as CyanogenMod .
To follow this manual recommend at least a basic knowledge of Linux alias without it I would not advise putting the phone in Root because it will be much easier to damage the unit. I'm not responsible for the procedures below, I followed the manual and I'll show worked for me but I could have lost the device if anything went wrong.
But what are the advantages of this process:
- the limitation of the official version only allow the installation of programs in internal memory that was in my case 60MB, with the latest versions of CyanogenMod programs go directly to the SD since it has an ext2 or ext3.
- The possibility of a partition using a Linux-SWAP
- Be able to provide internet device (tethering) to your computer or laptop via USB Wifi
- And much more see the list http://forum.xda-developers.com/showthread.php?t=567610
Of course there are disadvantages such automatic updating is turned off but for that we already own Cyanogen an application that makes the upgrade from them.
1-DOWNGRADE
So let's start first of all you need to do a downgrade to version 1.0, ie the phone will return the original form before the updates, this procedure will also be necessary if we are to remove the root privileges and have access to again automatic updates direct from Google.
Here I had two paths or two manuals is much like an easier and one that worked . The easiest basically do not need the GoldCard. I advise you to first try to make this straightforward procedure if the author was able to work with you and maybe save a few steps, Manual own Cyanogem GoldCard not speak anything.
In both cases we must first file DREAIMG.nbg RC29 (U.S.) [Link1] [Link2] if you have an American or appliance RC7 (UK) [Link1] [Link2] if you have a European machine, unzip the file and place DREAIMG.nbh the file on your MicroSD card from your G1. Do not rename the file, the file name has to be DREAIMG.nbh
The procedure without GoldCard just turn off your phone, press and hold the button to take photo and power button.
It will connect recovery mode, in my case I received the error message 00028002 (not allow) and return to this screen the rainbow. I have checked this message and found that it meant that my CID was wrong, this error also happened to me once with GoldCard but I think I must have made a mistake when copying the number of CID, for the second time it worked. In the comments of the manual also has a user who received an error message but simply formatting the SD and putting the file DREAIMG.nbh work, is a possibility.
To exit this screen you can dial by pressing the + Menu + End, in my case I was obliged to take out the battery and USB cable because this combination was not working.
If it works will appear next to those two screens, the first asking to push the power button to start the process. Be careful not to be without your cell phone battery as this procedure can be that would ruin the device. If managed istalar will not need to mount the GoldCard, and the device will be in version 1.0.
Following the line put the name of a dessert for each version of Mr. Andro Erick Tseng - Senior Product Manager of Android - said the next version will be the Froyo or frozen yogurt. The staff was betting on Flan for dessert with F. 
