Most apps seem to require minimum of firmware 4.3 nowadays. I've got a jailbroken iPhone 4 running 4.2.1. So I decided it's time to update. Researched for literally the last 2 days and found out I need SHSH blobs which Cydia was supposed to save. I open Cydia and the SHSH blobs are listed at the top: 4.2.1 thru 5.0.1, 6.0.1. I use Tiny Umbrella and it shows only 6.0.1 is saved. Why is Cydia showing all those blobs and TU can only pull up 6.0.1?! I've also tried using redsnow and the 'Query' option shows that I do have the firmwares that Cydia listed but there are no shsh files on my computer. what does this mean? I'm lost and sick of researching this. Thank you.