Iphone OTB firmware 1.1.1, Modem firmware 04.01.13_G, Itune 7.5, unlock with Anysim 1.1. Tested with Digi and Maxis.

The phone works normal, only the system SMS unreadable. I tried the "SMS fix" program and the SMS from Maxis is now readable. But the phone became unstable and keep losing signal. In the end there is no signal at all. No incoming and outgoing call available. SMS also dead.

Did some research on Internet, some suspect the modem (baseband) firmware corrupted. So I attempt to restore the iphone. Unfortunately, the restore actually upgraded the iphone to firmware 1.1.2 + 04.02.13_G. I was stuck with 1.1.2 and had done some extensive research on the Internet.

I tried to revert back 1.1.1 and even downgrade the baseband back to 04.01.13_G. But the phone functions never work again.

I tried to upgrade to 1.1.2 + 04.02.13_G, downgrade 1.1.1, unlock with Anysim 1.2.1u, install Oktoprep, upgrade to 1.1.2. But the phone functions still never recover.

I was quite sure it is the modem firmware problem because when a non AT&T sim is inserted, after a while the modem firmware info disappears from "setting-general-about" page.

My question to all the experts here are: -
1. What did I miss?
2. Anyone with similar experience?
3. Did Apple alter my iphone in anyway when I do the upgrade to 1.1.2?

Thank you for reading this, any constructive info is greatly appreciated.

========Update 08DEC2007==========
Sorry for not updating the post. Been busy lately.
My iphone problem still not solved. I deleted the baseband of 04.02.13_G and restore down to 1.0.2 and virginize the phone. I the restore to 1.1.2 and restore down to 1.1.1, unlock, oktoprep and updated to 1.1.2. The phone function returned for about an hour then cannot call in/out again.

New question:

1. Does the jailbreak of 1.1.2 do the patch of lockdownd already or do I have to manually replace it with a patch version?

2. My itune is 7.5, could that be the cause of failure?

This post has been edited by techhuan: Dec 8 2007, 04:40 PM

Did what you say once before, experience the same error even after installing iWorld and set caller id to show

Thanks for thw reply

Thanks for the advice. I will do the update one more time just to be sure. My no signal no call problem actually exist both on 1.1.1 and 1.1.2. I am worry I might have corrupted the NVRAM.

Sorry for not updating the post. Been busy lately.
My iphone problem still not solved. I deleted the baseband of 04.02.13_G and restore down to 1.0.2 and virginize the phone. I the restore to 1.1.2 and restore down to 1.1.1, unlock, oktoprep and updated to 1.1.2. The phone function returned for about an hour then cannot call in/out again.

New question:

1. Does the jailbreak of 1.1.2 do the patch of lockdownd already or do I have to manually replace it with a patch version?

2. My itune is 7.5, could that be the cause of failure?

This post has been edited by techhuan: Dec 8 2007, 04:40 PM

Thank for the info. I check my 1.1.2 Jailbreak java application is 6.5MB after unzip. AnySim 1.2.1u runs and reports success. But my phone still get bricked (no service) after about 30mins. I have no more ideas. No I will just try another virginization and reinstall the baseband again. I have been doing this one time too many.

Signal is the same indoor and outdoor - no signal. Tried with digi and maxis sim card. Setting -> Carrier -> shows error then exit by itself. When restarting phone, no service appears immediately follow by signal bar showing no bar and no carrier name appears.

Are you suggestng I use 1.0.2 firmware with 04.02.13_G baseband? In that case I should use anySIM 1.2.1u?

Thank you for trying to help?

This post has been edited by techhuan: Dec 13 2007, 04:16 AM

So should I run ieraser first then restore in DFU mode to 1.0.2 or the other way arround?