I have an jailbroken iPhone 5 that I'd like to restore the firmware on in order to get my carrier unlock activated, but I'd also like to keep my jailbreak. Strangely, it's been extremely hard to find information on whether or not it's possible to do so without going to the latest firmware. Anyone know if it's possible to update my 6.0.2 to 6.1 (the only version I have saved SHSH blobs for)? I kind of think the answer is "no, not possible" but maybe I've overlooked something. When I try it on iTunes, with TinyUmbrella's TSS server running, I get a type 11 error, and then I get stuck in a reboot loop until I kick it out with redsn0w.