mohdsamim - November 9, 2012 at 8:54pm
You'll need your SHSH blobs. Go on Cydia, in the featured section on top it would say the SHSH blobs it has saved, example maybe 4.0, 5.0.1, 5.1.1 or 6.0.1.
If it doesn't, You can't update at all.
If it does, Save your available blobs from TinyUmbrella (in this case the blobs to 5.1.1) and stitch them to an iOS 5.1.1 firmware, put your device into pwned DFU mode and Shift+Restore with the stitched firmware. Good luck.