ultrasn0w will only work on iPhones with basebade 4.26.08 or below (no unlock for 5.11.07), regardless of your firmware version (3.0, 3.0.1, 3.1). which means that you'll need to obtain a custom firmware pwned using PwnageTool, which will update the firmware but still retain the baseband.

PwnageTool is only for Mac users but the custom firmware can be used by Windows users. hence, if you're a Windows user, you'll need to obtain a custom firmware (google for one), restore through iTunes and you're good to go.

all custom firmwares are jailbroken, hence you'll need not to go through the jailbreak process again after restore.

you can downgrade from a firmware to an older one but not a baseband. therefore, do be extra cautious when upgrading firmware on a locked set, as once the baseband has been upgraded, there's no turning back.

you'll be stuck with a iTouch rather than an iPhone, unless Dev Team (or any other unlockers) is able to come up with a permanent unlock solution (just like for the 2G), which is highly unlikely for now.

at the moment, locked set users who wish to stay unlocked with the latest firmware, the only option left is to download a custom firmware (for Windows users) which upgrades the firmware but retains the baseband.

or alternatively, if you're a Mac user, you can create such firmware via PwnageTool.

check your phone's baseband. have you tried with a sim from another telco (if you're on Maxis, try on Celcom or DiGi)?

unfortunately, you can't. ultrasn0w doesn't work on baseband 5.11.07.

BlackSn0w Unlock for iPhone Is Coming Soon




Source

This post has been edited by teikwing: Oct 30 2009, 03:44 PM

ultrasn0w should work on 4.26.08. try it with a sim from another telco.

yes.


if your baseband is on 5.11.07 now, there's no way to unlock it until blacksn0w is released (that is, assuming it's going to be released by Geohot).

what's the origin of your set? i'm afraid there might be a soldered turbo sim in your i3G.

This post has been edited by teikwing: Nov 1 2009, 08:58 PM

if that's the case then ultra should work without any trouble then. you might want to rejailbreak again then redownload ultra.

from past experience, those who can't get ultrasn0w to work usually have a soldered turbo sim in their phone, or their baseband is at 5.11.07.

blacksn0w is live

via On The iPhone - Geohot



This post has been edited by teikwing: Nov 4 2009, 10:46 AM

for those who are running blacksn0w on their 3G/3GS on 3.1.2, kindly post your feedback here (issues etc.). will update mine once i have the time to update over the weekend. (currently still on 3.0 with ultrasn0w).



This post has been edited by teikwing: Nov 4 2009, 10:58 AM

finally on 3.1.2 but via an upgrade using custom FW (since there are some experiencing WiFi issues on blacksn0w). still preserve BB at 4.26.08.


MuscleNerd via Twitter



and i'll requote what i've posted what the DevTeam has stated regarding blackn0w & custom FW again:



bolded sentences are why i'm still on custom FW.

well, in my case (using custom 3.1.2), there are no drops calls issue or WiFi problems.

let's wait for some feedbacks from those who blackra1n & blacksn0w'ed on 3.1.2 with BB 5.11.07.

A FRIENDLY REMINDER:

*This thread is solely for discussions on unlock-related issues/news/troubleshooting, for jailbreak-related questions, please refer to Pwnagetool/Redsn0w/Purple&Blackra1n Thread, 2G/3G/3GS Jailbreak[iPhone 3.1.2 is OUT]

Thank you for your cooperation.

do you still have your official sim with you? if not, you'll need to hactivate using blackra1n. (http://www.blackra1n.com/)

firstly, you'll need to determine your i3GS's bootroom. if you're on iBoot-359.3.2, 'tethered jailbreaking' is required. (google for definition of that).



if you wish to unlock, get blacksn0w.

additional information and guide on unlocking is available on the first page.

is your unit with the new bootrom?

the jailbreaking process is the same as those with old bootroms.

just jailbreak with blacksn0w & select hactivate option (if available).

the only thing to take note of for your unit is, everytime you power off/reboot your unit, you will need to connect it to your PC and run blackra1n to rejailbreak. that's what tethered jailbreaking means.



This post has been edited by teikwing: Nov 12 2009, 02:40 PM

read

How to Jailbreak and Unlock Your iPhone 3G, 3GS Using BlackSn0w [Windows]

if you would like to seek advice, do make your problems clear. list down steps that you have took and where you're stuck at.

again, this link do provide clear-cut instructions.
How to Jailbreak and Unlock Your iPhone 3G, 3GS Using BlackSn0w [Windows]

an embedded turbo/unlock sim in your iPhone. was popular during the 2.0-2.2.1 FW time. well, you can take the blacksn0w route for the time being.

which jailbreaking software did you used, blackra1n? there have been reported cases where WiFi issues arise when iPhone is jailbroken with blackra1n.



you can try Apple Support.


the latest ultrasn0w does work on 3.1.2 with BB 4.26.08 (fixed carrier logo issue as well)

i think he might be confused between redsn0w/ultrasn0w/blackra1n. on the unlocked status, i guess his set might be soft-unlock since he did mention about Cydia->blacksn0w to unlock, which requires WiFi (which he's unable to utilize).