Please help me upgrade iphone 4 and preserve baseband

[dmx434343]

Hello,

I have an iPhone 4 and it has software 4.0 I would like to upgrade to the latest possible (i believe this is 4.1) and preserve my baseband as i have it unlocked for t-mobile. Please help me out!

I have downloaded tinyubrella and saved my SHSH.

Thanks in advanced!

[Cowboy]

What you need to do is get a custom ipsw. The latest fw is 4.2.1 so get a custom ipsw for 4.2.1 that has a perserved baseband. And use redsn0w to jailbreak.

[dmx434343]

can someone upload it for me and message it to me, or even teach me how. All help is GREATLYYYYYYY appreciated.

Thanks again