The Guide... Upgrading your Firmware to 4.1

[Ice0004]

I didn't see one that was stickied, maybe this one should be.

Could someone explain what the safest way is to upgrade to 4.1 with a jailbroken iPhone 4.

Please be detailed.

[iYeow]

Download Tiny Umbrella 4.1.4
Plug your iphone in.
TU will recognize your ECID
Click Advance Tab
Device / Version : Select Iphone 4, 4.1 shsh blogs
Click Save shsh
Wait for answer
Now start TSS Server
It should say now connecting.
Do the Shift + Restore to 4.1 ipsw
Your iphone will be restored to 4.1 but baseband preserved at 4.0

The catch here is your 4.1 shsh blogs must be stored in Tiny Umbrella.

[Ice0004]

shift + restore? Where am I doing that at?

[iYeow]

When you do a shift key on your keyboard + restore on your Itunes, a box will open up and you choose your firmware.