Keep unlock when upgrading from 3.1.2 to ios 4.0.1

[Cardinals_fan365]

I have a 3GS(old boot rom) 3.1.2 jailbroken and unlocked (I don't have a data plan).. Is it possible to upgrade to ios4 and keep my unlock. This way I don't have to register my iPhone with AT&T.. Or is there a program I can download where i can unlock from my computer to bypass the registration process..(the only unlock for 4.0.1 that I can find is through cydia)
Any help would be greatly appreciated!!!

 

[TampaDude]

I have a 3GS(old boot rom) 3.1.2 jailbroken and unlocked (I don't have a data plan).. Is it possible to upgrade to ios4 and keep my unlock. This way I don't have to register my iPhone with AT&T.. Or is there a program I can download where i can unlock from my computer to bypass the registration process..(the only unlock for 4.0.1 that I can find is through cydia)
Any help would be greatly appreciated!!!

Both the latest jailbreak and ultrasn0w carrier unlock work with 4.0.1, so you should be good to go.

 

[big9erfan]

IMO the latest jailbreak is pretty buggy. Use sn0wbreeze or pwnage tool to create a custom firmware that preserves your jailbreak and baseband and re-unlock with ultrasn0w

 

[rdiddy_25]

I agree with big9erfan. That's the best way to go till they fix all the issues

 

[Cardinals_fan365]

IMO the latest jailbreak is pretty buggy. Use sn0wbreeze or pwnage tool to create a custom firmware that preserves your jailbreak and baseband and re-unlock with ultrasn0w

So if I use the custom firmware. I can upgrade to 4.0.1 and won't have to register my phone?

 

[big9erfan]

Technically AT&T knows exactly what kind of phone you have. They can at any time require you to have a Data Plan as that is part of the contract ( if you have an iPhone you are required to have an iPhone data plan ).

I'm not sure what you mean by "register". If you mean "hacktivation", then I believe sn0wbreeze and pwnage both support that.

 

[TampaDude]

IMO the latest jailbreak is pretty buggy. Use sn0wbreeze or pwnage tool to create a custom firmware that preserves your jailbreak and baseband and re-unlock with ultrasn0w

I think the 3GS is having more issues than the 4 with the current JB. My 4 is running smooth as silk...no issues.

 

[Cardinals_fan365]

Yes activation is what I meant..
Thanks I'll try sn0breeze