Recently got my iPhone 4 replaced as the lock button broke. I had it JB on 4.2.1 and luckily my replacement unit came with 4.2.1. Unfortunately the iPhone has been acting a little strange (random restarts, turning off for no reason) and I need to restore it, but of course I want to keep it on 4.2.1 so that I can JB it. What options do I have to save the SHSH? I've already got it JB and it's now been 3 days and Cydia still tells me it's in the pending TSS queue. Is there any other way I can restore to 4.2.1?