Hey guys, I recently got a iPhone 3GS, cz my other phone was broken. So, I thought of updating it, since it hadn't been updated before. After its iOS was updated to 6.1.3, it said that my SIM card is not supported under the activation policy. So, I went ahead and jailbroke it. But it was only tethered jailbreak. And I also noticed that the phone was slow and its battery life was bad. So, now I was wondering how I can downgrade it to 4.1, since thats the only SHSH blob that I have. I tried going to redsn0w and restoring it, but it goes to recovery mode after. Basically, my question is, how do I downgrade a tethered jailbroken iPhone 3GS from 6.1.3 to 4.1? Any help on this would be awesome. Thanks!