This is what I oberved after I unlocked a 1.1.2 baseband and downgraded to 1.02

I tried to use ieraser to erase the unlocked baseband , the program hangs, at the prompt waiting for data,

this anamoly only happens while trying to erase a unlocked baseband from 1.1.2 ie 4.02xx on 1.02 or perhaps on any firmware, so as of now if we have a unlocked baseband from 1.1.2 we cannot relock it by flashing it with any other baseband,

I'm very sure that I used a the secpack for 4.02xx . Has anyone else noticed this?

Although no one would want to do that, but I dont understand why is this happening, I restarted putty several times and tried and as always it hangs, if you can erase the baseband thats when the phone is not unlocked.

why you want to erase it anyway?? You can download back to 1.0.2 and use anysim 1.1.2u to unlock it.

Originally Posted by dualmax

why you want to erase it anyway?? You can download back to 1.0.2 and use anysim 1.1.2u to unlock it.

not being rude, if you read its already unlocked, but i'm just trying to figure why is it not allowing the baseband to be erased using ieraser
btw I was able to unlock while being on 1.1.2

I am also interested in downgrading 04.02.13 baseband firmware.
My iPhone was unlocked with IPSF. I had 1.1.1 firmware, but yesterday I decided to upgrade it to 1.1.2. I did not like 1.1.2 and downgraded back to 1.1.1, then to 1.0.2 because I did not want to jailbreak and activate it via jailbreakme and prefered to use independence instead. I was unable to update it using independence, because the phone stays in dfu mode after running firmware upgrade and there is no way to get it out of it (tried with independence and ibrickr). Later I had to jailbreak and activate via jailbreakme.
The problem I have is that there is No Service and all the carriers are unselectable. Wifi works fine though. When I use other firmware (1.0.2 or 1.1.2) phone works fine, no more No Service. It only happens in 1.1.1
Actually I have not seen any info on what consequences will have IPSF unlocked phone after baseband downgrade and if it is possible at all.

I'm in a similar situation. I have the latest modem firmware 4.0.2.13 unlocked for use with T-mobile, but the phone only works with version 1.0.2.

I would like to return to FW 1.1.1 with 4.0.1.13 baseband, but I'm not sure if I need to virginize or just downgrade the baseband.

Any ideas?

Originally Posted by kdub3000

I'm in a similar situation. I have the latest modem firmware 4.0.2.13 unlocked for use with T-mobile, but the phone only works with version 1.0.2.

I would like to return to FW 1.1.1 with 4.0.1.13 baseband, but I'm not sure if I need to virginize or just downgrade the baseband.

Any ideas?

I went through this last night, here is what I did when ieraser froze:

Pray that you have the BSD subsystem, terminal, bbupdater, and the ICE03.14.08_G.eep and ICE3.14.08_G.fls on the phone.

I quit my SSH session to the phone and then could not connect to the phone via SSH. I fired up Term-vt100 and navigated to where I had stored the .eep, the .fls, ieraser, and bbupdater.

Check to see if ieraser actually DID what it was supposed to do. run "bbupdater -v". If it comes back as "baseband unresponsive to pinging", then you are good and can move on to reflashing the baseband. Run "bbupdater -e ICE03.14.08_G.eep -f ICE03.14.08_G.fls".

Let this do it's work, it should take a few minutes. When it's done, run "bbupdater -v" to see if it worked. If it did, you should see this:

Code:

Resetting target...
pinging the baseband...
issuing +xgendata...
    firmware: DEV_ICE_MODEM_03.14.08_G
 eep version: EEP_VERSION:207
eep revision: EEP_REVISION:7
  bootloader: BOOTLOADER_VERSION:3.9_M3S2
Done

As long as you see that, you're good to go. Make sure to reload the commcenter by typing "launchctl load /System/Library/LaunchDaemons/com.apple.CommCenter.plist", and then reboot.

Now you should be able to restore or upgrade to 1.1.1 via iTunes, and it will install the 04.01.13_G firmware in the process. After that, do what you please.

hi guys im using IPSF on one of my iphones and i downgraded baseband just to see what happens and it worked perfectly the baseband does get downgraded and the unlock remains, so you will have no problem for doing this

Originally Posted by jprooney

hi guys im using IPSF on one of my iphones and i downgraded baseband just to see what happens and it worked perfectly the baseband does get downgraded and the unlock remains, so you will have no problem for doing this

Sorry to ask, but what method wre you using? And with what firmware? Thank you.

Originally Posted by belcorriko

I went through this last night, here is what I did when ieraser froze:

Pray that you have the BSD subsystem, terminal, bbupdater, and the ICE03.14.08_G.eep and ICE3.14.08_G.fls on the phone.

I quit my SSH session to the phone and then could not connect to the phone via SSH. I fired up Term-vt100 and navigated to where I had stored the .eep, the .fls, ieraser, and bbupdater.

Check to see if ieraser actually DID what it was supposed to do. run "bbupdater -v". If it comes back as "baseband unresponsive to pinging", then you are good and can move on to reflashing the baseband. Run "bbupdater -e ICE03.14.08_G.eep -f ICE03.14.08_G.fls".

Let this do it's work, it should take a few minutes. When it's done, run "bbupdater -v" to see if it worked. If it did, you should see this:

Code:

Resetting target...
pinging the baseband...
issuing +xgendata...
    firmware: DEV_ICE_MODEM_03.14.08_G
 eep version: EEP_VERSION:207
eep revision: EEP_REVISION:7
  bootloader: BOOTLOADER_VERSION:3.9_M3S2
Done

As long as you see that, you're good to go. Make sure to reload the commcenter by typing "launchctl load /System/Library/LaunchDaemons/com.apple.CommCenter.plist", and then reboot.

Now you should be able to restore or upgrade to 1.1.1 via iTunes, and it will install the 04.01.13_G firmware in the process. After that, do what you please.

so ur saying while it gets freezed it is doing what its supposed to do, ie it does erase the baseband, do u remeber how much time did u give it?

I can confirm that you can erase the baseband on 1.1.2

As stated above best to have local term/utils to check, but I did it via SSH.

The phone hung, I let it sit for about 5 minutes and rebooted it.
It gave the standard error phone needs service on reboot.
(Something about phone cannot make/receive calls)

I restored to 1.1.1 and it reinstalled the baseband firmware.

Risky, but got lucky I guess?