To start off, i own a iphone 4 GSM and was looking into jail-breaking it. After searching the web i soon found out that there was as of current no 5.1 untethered jailbreak. So I then went on to find out how i could downgrade my iphone 4 to 5.0.1 where there is a known jailbreak. After a long time of searching I found out there is no 5.1 to 5.0.1 downgrade available for me as there are no SHSH blobs saved for me or available on cydia for my iphone 4 make. Then I found a program called iSHSHIT which saves you SHSH blobs from you iphone, however you must have you iphone 4 jail broken to do so. So finaly my question... Could i use the working tethered jailbreak for 5.1 and then use iSHSHIT to get my SHSH blobs and then downgrade using the SHSH blobs I just obtained?