Upgrade currently unlocked 3G[s] iPhone (Using Black Rain) from 3.1.2 to 4.1
Not long ago, there was a time when the iPhone 3G[s] was very famous and people used to buy it and Jailbreak and unlock it for the use with other carriers. One of the famous tools for jailbreaking at that point in time was blackrain. Almost every one I know used the black rain on the iPhone version 3.1.2 and used the blacksnow for the unlock. This works great but there is one issue. Most people on the New boot rom got a tethered Jailbreak, which means they have to use blackrain every time ( http://bit.ly/grYDye ). After that a lot of untethered jailbreaks were released and they want to go there. I had the same experience, so I thought I would document it here, DISCLAMER: Please use this guide on your own risk. I am not responsible for anything that happens to your phone due to this. I have used the same procedures and it worked for me.If you have any questions, put those on the comments and I will try to answer them. All the software is also availab...