Baseband Downgrade problem (5.1.1 to 4.3.3)

[dweller]

Hello there guys,

I was using 4.3.3 before I decided to upgrade to 5.1.1. I was planning to use SAM unlock but unfortunately, I noticed that I had to backup "cookies" (or whatever it is) to use it on 5.1.1 after I upgraded :/. Since I don't have any backups for that, I decided to go back 4.3.3 (I couldn't upgrade to 5.0.1 because iTunes always giving an error and of course I don't have shsh for 5.0.1). I turned back to 4.3.3 but I noticed that my baseband is still 04.12.01. Isn't it supposed to downgrade to original 4.3.3 baseband, which is 4.10.01 ? I even tried to make a cfw with sn0wbreeze but its still has the same baseband (i might not using sn0wbreeze as it supposed to be, so I'm open for enlightments).

Because of this, I can't use my Gevey solution. I have all iOS 4.x shsh's but none 5.x except 5.1.1 :/

Foot note: I saw that AT&T started to unlock off-contract iPhone's and mine is too. I tried to contact with AT&T through their sites but they require you to create an account and link it to your service which I don't have any document or information about my AT&T credentials. Is there any way to pass through that authentication and ask for them to unlock my phone ?

Thanks for your time&help

 

[h2olover1]

if you upgraded the ios without preserving the 4.10.01 bb. you cannot downgade the baseband. regardless of shsh blobs. sorry. you are out of luck my friend

 

[Jmills87]

h2olover1 is correct, there is no way to downgrade baseband, once it's upgraded you're stuck with that baseband.

 

[dweller]

So long for my phone

There is no current solution for 4.12.01 right ? I think there is only one way for me which is talking with AT&T to unlock my phone legally. But their system is so stupid ! I just can't send an email to even start talking !

Is there anyway to get connected with them ? Anyone ?

 

[Thomasjtsi]

Correct... no Unlock available for the 4.12.01 BB. Not sure about contacting AT&T though... can't you just call their 1800 #?

 

[dweller]

Correct... no Unlock available for the 4.12.01 BB. Not sure about contacting AT&T though... can't you just call their 1800 #?

The problem is, I'm from Turkey and me calling AT&T from here needs another iPhone 4 budget -_-. International fees are so expensive in Turkey and I'm not sure that I can explain my problem on the phone. All I need is an email from AT&T that can give me the support that I need. :/

 

[Jmills87]

The problem is, I'm from Turkey and me calling AT&T from here needs another iPhone 4 budget -_-. International fees are so expensive in Turkey and I'm not sure that I can explain my problem on the phone. All I need is an email from AT&T that can give me the support that I need. :/

AT&T uses a toll free number, you can also do a live chat with a support person on their website.

 

[dweller]

AT&T uses a toll free number, you can also do a live chat with a support person on their website.

Their number is free inside the USA as far as I know. And you should complete the register procedure that i wrote before to do live chat. They just suck at it...

 

[mugunthans]

Hello,

I unlocked my i4 without any ATT account info. Just call as many time as possibe in USA day time until some customer care representative accept your request and create a case to unlock your i4 and Convey them that at this you are not using ATT and lost the documents and tell him/her with confidence that your phone is not in contract and no pending dues.

How to call US free.
1. Go to this URL :safari: (replace x with t) hxxp://hidemyass.c o m/proxy-list/
2. Select Unites states --> update results
3. Note down the IP / port
4. Open your IE and click Tools > internet options > connections > LAN setting >
5. Configure IP / port and OK every where...
6. Go to this URL :safari: hxxp://whatismyipaddress.com and ensure you have some US Location and IP address.
7. Open Gtalk and dial hone: US toll free number
8. Talk to ATT and unlock i4.

Hope it helps...
-Mugunth

 

[dweller]

Hello,

I unlocked my i4 without any ATT account info. Just call as many time as possibe in USA day time until some customer care representative accept your request and create a case to unlock your i4 and Convey them that at this you are not using ATT and lost the documents and tell him/her with confidence that your phone is not in contract and no pending dues.

How to call US free.
1. Go to this URL :safari: (replace x with t) hxxp://hidemyass.c o m/proxy-list/
2. Select Unites states --> update results
3. Note down the IP / port
4. Open your IE and click Tools > internet options > connections > LAN setting >
5. Configure IP / port and OK every where...
6. Go to this URL :safari: hxxp://whatismyipaddress.com and ensure you have some US Location and IP address.
7. Open Gtalk and dial hone: US toll free number
8. Talk to ATT and unlock i4.

Hope it helps...
-Mugunth

Wow... Thanks mate.

This is some promising advice. I will try to do what you said. Hopefully I can manage to make them understand my situation.

And another thanks for creating your account just to tell me this way. :gratz: