Updating operating system iphone 3gs
Just sit tight, and when the process is complete Red Sn0w will let you know the restore was successful.
Your i Phone 4 or i Phone 3GS should now be running the i OS 6 firmware with the same baseband you had on your previous firmware version. If you have any further questions or thoughts please turn your attention to the comments section below.
Note: You will be able to find the model number starting with at the back of your device.
Step 3) With Red Sn0w up and running you will need to simply click the Extras button, followed by the Even More button. Step 4) Now click the IPSW button and select your i Phone 4 or i Phone 3GS i OS 6 firmware file you downloaded in step 1.