Are your SHSH's saves on Cydia? If not,...do it right after this tutorial
if you require an unlock to use your phone.. DO NOT follow these instructions.
You'll need the most recent version of iTunes.
Download the iOS firmware for 4.1 for your phone (use google)
Turn phone completely off. Plug into computer, ...put into DFU.
Kill iTunes if it opens automatically.
Open TinyUmberlla,... start TSS Server.
Open iTunes, it will say your iPhone in in recovery, ignore it. (click ok..close it)
Option + Restore (MAC), shift + restore (I think for windows).. choose the firmware you downloaded earlier.
Should go through completely.
Use TinyUmbrella 'Kick out of Recovery' button to ...well..kick your phone out of recovery.
13" MacBook Pro 2010 16gb iPad Mini WiFi 16gb iPhone 5 Time Capsule 1TB AppleTV 2 & 3