In order to futureproof your iPhone upgrade, you need to get and save your ECID, iBEC and IBSS.
In order to do this you need the following program:
You can then follow these instructions from step 6 on – the grabber will do the temp file watching for you. You will then have your iBEC and iBSS files. NB If you only get the iBEC file, you can also look in C:\Users\All Users\Apple Computer\iTunes\iPhone Temporary Files\Firmware\dfu – they might both be in there…
In order to get your ECID:
NB. the box purplera1n.com is invisible (black) above the donate button.
In order to jailbreak you need your ipsw file and Redsnow. Redsnow will ask you for the location of the ipsw file (if you downloaded the update from Apple that would be: users\”USERNAME”\appdata\roaming\apple computer\itunes\) and works with 3.0.1