Iphone 3G 8gig 3.1.3 firmware, bb 05.12.01. solved

The Solution...

Una... restore ko muna sa 3.1.2 original firmware, tumitigil sa gitna ng
process "error".
Next... restore sa original 3.1.3.... tumuloy pero nakahang lang sa
itunes. Ginamait ko redsnow94 pero 3.1.2 firmware ang niload para walang
error. Buhay na pero walang signal at ang baseband nya (modem) ay
naging 05.12.01.

At this point... almost lahat ng thread na nabasa regarding iphone 3G na
tumaas ang baseband ay hopeless na na magkasignal uli.


The Final Remedy... DOWNGRADE BASEBAND to lower version.

Ngayon ang unit ay nasa 3.1.3 firmware at baseband 05.12.01.


Here are the steps i followed to downgrade baseband using FUZZYBAND
fron Cydia.

Step 1: To downgrade your baseband from 05.12.01 to 04.26.08, you
must first jailbreak your iPhone 3G running firmware 3.1.3 by using any
of one these guides: redsn0w 0.9.3, redsn0w 0.9.4, sn0wbreeze or
PwnageTool 3.1.5.

Step 2: After you have jailbroken your iPhone, Go to “Cydia” on
your iPhone and Search for “Fuzzyband” and then install this
application.


Step 3: Start “Fuzzyband” app and touch on “Downgrade” button to
downgrade your Baseband from 05.12.01 to 04.26.08.


Step 4: You should now be able to perfectly unlock your iPhone 3G
using the latest version of ultrasn0w by following the step-by-step
guide posted here.

NOTE: For those of you who don’t know your bootloader, simply run
Fuzzyband and it will report the version number for you.

credit goes to powertools