[1.0.2 otb][How to][Upgrade unlocked v1.0.2 to v1.1.2]

Hi,
Would like to ask if there's any good step-by-step tutorial that i can follow to upgrade my unlocked v1.0.2 iphone to v1.1.2?

According to Hackthatiphone.com,

What will also work:

* If you are on 1.0.2 firmware, and used anySIM prior to version 1.1, then repair your baseband and upgrade directly to 1.1.1 Read my tutorial here for repairing the baseband.
* If you are on 1.0.2 firmware and used anySIM 1.1, (then run the oneSIM program if feeling truly paranoid) and then update to 1.1.1

I bought my iphone unlocked already from a shop....so i dunno whether i need to repair basebase or not...or whether to use oneSIM....

can anyone help? iclarified also dun have this tutorial...Thanks!

can anyone help pls?

nw i found this link

http://iphonehacking2.webs.com/unlocked102111.htm

it seems like exactly wat i need but it only upgrades to v1.1.1 plus at the start it says virginize my iphone by running the installer....

my iphone now doesnt have an installer!! how???

no one can help me? can any bro here teach me how to install appsnapp from jailbreakme.com???


i clicked install appsnapp but then an error msg pops up

Incorrect firmware version! You must use iTunes to restore your iPhone to firmware version 1.1.1 before you can proceed. Your current firmware version is 1.0.2

wat shld i do?