re: Official iPhone/iPod Touch owners thread
Ok..... I never heard...of anyone doing shsh blobs before when people jailbreak.
So you mean i should SHSH my 4.2.1????????
I done lot of time still I have all my SHSH blob from 4.0 to till.
1- Save you shsh blob by using Tiny Umbrella of your current FW which installed in your device.
2- Download the same firmware for iPod (confirm twice)which you going to JB. ex- 4.2.1 is install in your iPod and again you want JB your iPod on same firmware, but apple is not signing on for your current firmware (means Apple release new firmware) that's why you need tiny umbrella to fool itunes server to show yes Apple is still signing for this particular FW.
3- After saving you SHSH blob and downloading the exact same firmware you need to run first tiny then click on "Run server" something like that afterwards open the itunes then click "Shift + Restore" to install the that particular firmware. Volla you succeed then JB with redsnow.
I thing it's now simple to understand. Please do some and read tutorial it will help you.