Hi, I've scoured the forum but I can't seem to find anything that answers my questions.

My iPhone 3G was bought from America. After initial failures in unlocking it on my own, I took it to a computer store where they did it for me. All was well. I used a Maxis 3G post-paid sim card and I could download Apple Store apps, etc.

Unfortunately, I stupidly (accidentally) updated 2.2 firmware to 2.2.1. My sim card could no longer be identified. Desperate, I activated my phone with a prepaid AT&T sim card I had on me. The latest back up on my iTunes for my phone has the American number registered, along with all the files on my iPhone.

I downloaded Quickpwn 2.2.5 because it's said that it can unlock this new firmware. Everything went smoothly, but like when I first got my phone, I can't make or receive calls (immediate failure) and I would like to do it on my own if possible (since I'm tight on cash right now).

Question 1: How can I enable calls on my iPhone?

Question 2: Can I restore my latest back up after fixing this issue, or will I have to input everything from scratch?

Thanks very much.

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Added on February 5, 2009, 6:22 pmOh, just to add, I can surf the internet and access every other part of my iPhone. The dialer doesn't freeze up on me or anything; I just have No Service and cannot make calls at all.

This post has been edited by hanae0711: Feb 5 2009, 06:22 PM

Try asking Hanxz at his thread

He knows this things inside out..

Thanks, replying at his thread now.

are u sure u thoroughly go through this forum?...urm..if u did,surely u will find the answer..
btw, do u know the difference between unlock n jailbreak?


Unlock/Activate = a method to make the iphone working with any carrier other than AT&T.
Jailbreak = forcing the Iphone to accept installing 3rd party application (through Cydia @ Installer)

For Iphone 3G, the only way to unlock it is through 3rd party application called yellowsn0w that can be downloaded through Cydia after u jailbreak it using PwnageTool (Mac) or QuickPwn (PC).

Unfortunately for ur case, u said u have updated the firmware to 2.2.1. Thats means u cannot longer activate ur iphone with other telco than AT&T bcoz it is locked to AT&T. This yellowsn0w im talking about only support up to 2.2 firmware. So, what u can do right now is pray for the Dev-Team (team that develop this yellowsn0w thing,mostly musclenerd) come up with new version of yellowsn0w that support 2.2.1 firmware. For more info : http://blog.iphone-dev.org/

This post has been edited by dzerg: Feb 5 2009, 06:37 PM

Thanks for your response, dzerg. And yes, I do know the difference between jailbreak and unlock.

Thing is, every time I searched online for help on unlocking my iPhone, I was constantly redirected to pages teaching me how to use Pwnage Tool or Quickpwn (which is now also available for Mac). To be frank, I didn't know much (if anything) about yellowsn0w. But if the issue is basically the firmware version, I can just downgrade to 2.2 and it should be fine, right?

just a correction, there is also Quickpwn for mac

u did mention that ur i3g were origin from US. then i assume this is not unlocked unit right?
even u downgrade to 2.2 it still wont solve the problem. u have to jailbreak & install the app named "yellowsn0w" from Cydia.

@gengstapo

Yeah, that's what I'm doing right now.

alright then, wish u good luck & enjoy ur i3g

@hanae0711
Actually you're in deep s**t. When you upgrade the phone to 2.2.1, the baseband already change. Yellowsn0w only work with 2.2 baseband (02.28.00). You can check the baseband in Settings --> General --> About --> Modem Firmware. If it state 02.30.03 then yellowSnow won't work.

If you want to upgrade from 2.2 to 2.2.1, the correct way was using Pwnagetool and create a custom IPSW (firmware file). In Pwnagetool, there's an option to disable baseband update, means you can upgrade the phone firmware to 2.2.1 but keeping the 2.2 baseband.

You did not open your eyes wide enough as there's a thread on it. Link below.

http://forum.lowyat.net/topic/790913

Once you have updated your firmware to 2.2.1, your baseband is at 02.30.03. Unfortunately you own a 3G Lock iPhone. You will not be able to unlock it until there's a solution from DevTeam. Enjoy you iPod Touch.

And I forgot one thing, downgrading the firmware from 2.2.1 to 2.2 WILL NOT downgrade the baseband. It's a one way street as in baseband version can only go up and not down. I'm afraid you're stuck with an iPod Touch for the moment.

Answers gotten. Thanks.

in an unrelated note, this update has always been fondly as known as the the yellowsn0w "killer", in order to hinder dev team's progress.

im sorry for u my fwen..got unlucky this time...im afraid wat u can do right now is pray for updated yellowsn0w that can be used with 2.2.1 firmware..


This post has been edited by dzerg: Feb 5 2009, 07:36 PM

There is possibly a way to downgrade to 2.2 from 2.2.1 with the baseband downgraded too.
Go to this site to read about how to do it.

http://www.iphonehacks.com/2009/01/stepbys...irmware-22.html

Many of them got stuck on how to restore the phone in recovery mode. The video will demo & explain how to do it. You have to follow the sequence in the video strictly.

http://www.youtube.com/watch?v=xO1jiPE9nnY
Hope this help to get your phone working.

The other way is to get the Gervey SIM unlock card for firmware 2.2. It has been proven to work.

atleast, u can used it with at&t carrier
it aint damage yet

can downgrade to 2.2 from 2.2.1 but baseband still can't be downgraded....."bad news"........

"iPhone 3G users: The Dev team should soon release updated versions of their PwnageTool and QuickPwn tools to jailbreak your iPhone 3G running firmware 2.2.1 or or use this guide to first downgrade to firmware 2.2 and then jailbreak it. But since the latest firmware updates iPhone 3G's baseband to 02.30.03, you will not be able to unlock it even after downgrading to firmware 2.2. You will need to wait for some time for the Dev team can unlock baseband 02.30.03."

baseband is like one way street..... only can go up but cannot go down..... so TS can use d Grevey Sim Unlocker n wait for d yellowsnow to update...

Not true. Many of the guys have actually got the baseband downgraded to 2.28 from 2.3.03.
The site is:
http://www.iphonehacks.com/2009/01/stepbys...irmware-22.html
This is what was quoted and there are also many post showing that some have successfully follow the step and downgrade to 2.2 incl downgrading the baseband.

------ post from the site ------------------
One of our readers, ezio-xb just commented on our step-by-step guide to downgrade from iPhone firmware 2.2 to 2.1 to tell us that he was able to successfully downgrade his iPhone 3G back to firmware 2.2 and jailbreak it. We have updated the guide to downgrade from iPhone firmware 2.2.1 to firmware 2.2
------------------------------------

Have not tried this myself but I am using the 2.2 SIM unlock card & it works.

@chrisl_57
Stop giving false info/hope to the TS.

I've read the link that you gave over and over again and not a single line said you can downgrade the baseband back to 02.28.00. All they were discussing was downgrading the FIRMWARE and not the BASEBAND. Get the fact straight first before giving hope to people. If it was possible, won't the dev team already given the solution to it?

FIRMWARE and BASEBAND are different. From my understanding, most of them in that site want to JAILBREAK their phone and not to UNLOCK. Thats why they want to downgrade the firmware from 2.2.1 to 2.2 since dev team has not release Pwnagetool or Quickpwn for 2.2.1 at that time.


The bolded sentence shows the reader downgrade the firmware to jailbreak it and not to unlock it. I assume most of them are using AT&T hence there no need for an unlock, they were just concerned about jailbreaking. But our TS is trying to UNLOCK his phone which is not possible with 2.2.1 baseband (02.30.03) at this moment.