How to Downgrade your Bootloader with ZiPhone (Windows)

Posted February 13, 2008 at 11:35pm by iClarified · 32 comments · Add Comment
pradip shrestha - May 29, 2009 at 11:40am
Download application in iphone there is not problem but its could not open
sudhir - December 11, 2008 at 3:56am
how downgrade baseband 2.1,i have upgrade 2.2 and re downgrade 2.1, now phone is locked , how i downgrade baseband
wombat - February 28, 2008 at 6:23pm
...using ZiPhone 2.4 it worked just fine. Now I have Bootloader 3.9_M3S2 and Modem Firmware 04.03.13_G. The APP Baseband Info says that I have Mode iPhone 1.1 although I'm actually on 1.1.3. Guess it's the same. Everything works fine so far....... ----------------------------now waiting to upgrade to 1.1.4------------------
wombat - February 26, 2008 at 6:26pm
@iClarified: Meanwhile we are at ZiPhone GUI V 2.4....................I used the method in the previous tutorial, which did not have the option to downgrade the bootloader from 4.6 to 3.9. Now 1.1.4 is on the market.........My Q.: should those who did not use the option (as not yet available) to downgrade the bootloader in order to get to Firmware 04.03.13_G????? With 1.1.4 out it seems to make more sense now to downgrade to 3.9.....................
Dg - February 15, 2008 at 10:01pm
There are some answers / help for the questions flying around here on: http://www.hackint0sh.org/forum/showthread.php?t=30238 Worth taking a look.
steve anderson - February 15, 2008 at 6:41am
iclarified all went well dl to 3.9 but got no sound at all any idea mate
steve anderson - February 15, 2008 at 6:36am
no souind at all any ideas
Grzegorz - February 15, 2008 at 3:29am
Thx Russell :)
I did Restore in iTunes (to newest version which is atm 1.1.3)
Then did run ZiPhone 2.1: "ClickHereX4.6.bat will call Ziphone -b -j -a (Downgrades bootloader be warned, use for iphone > 1.1.2)"
But somehow iPhone screen was "Slide to emergency" aftewards. Only Bootloader downgrade was successful.
So again i run ZiPhone 2.1, now GUI, checked Activation, Jailbreak and Unlock.
In 2'30" i had fully working unlocked 1.1.3 phone :)
Sending sms to multiple users works, Google Maps located me on the map with right position, thanks to cellullar towers. So i suppose everything works fine. At last. :)
John - February 15, 2008 at 2:45am
What happen for those that were the GeoHot early adopters With 4.6 BL ? What happens when we try to downgrade our bootloader?
Steve anderson - February 15, 2008 at 1:34am
yes I have done b option works fine
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