1. 
What is JailbreakMe 2.0?
This is the latest cross-device/firmware untethered jailbreak by comex.    It was released on Sunday, August 1 (like the previous jailbreak,    carrying over the "Sunday is Funday" slogan many veteran jailbreakers    and unlockers are familiar with.
2. 
How Does this Jailbreak Work?
All you have to do is visit 
http://jailbreakme.com  on your iPhone, iPod touch or iPad, 'Slide to Jailbreak' and wait for  the rest of the process to take place on your device.
If that link is not loading, please 
use *****i's alternative link to jailbreak  your device
3. 
My Device Just Hangs at a Purple Screen. What do I do?
This will usually mean there was a problem connection to the server and    whatever you're attempting to do isn't working properly. After  sliding,  a  windows should appear and you should notice a process  similar to the   one in the images below. If your jailbreak does not  appear similar to   mine, then something had gone wrong. Reboot and  attempt the jailbreak   again.
Please note that this process may take a few minutes, so be patient. It  should look a little something like this:
 
 
 
 
 
then open cydia and install ultrasn0w to unlock ur device  thnks...........