These days there were quite a lot of questions regarding iOS 4.0 and the possibility to activate/decode the phone after an update to the jailbroken version of iOS 4.0 GM, so I decided to make this article to explain what you can/can't do with iOS 4.0 GM at the moment.
First of all, if you have baseband 05.12.01 you CANNOT decode the phone regardless of the firmware you restore to, whether it is 4.0 or 3.0, there is no decoding software that can decode that baseband or baseband 05.13.x from iOS 4.0 GM.
Those with iPhone 3G who update to iOS 4.0 GM will update their baseband and by default will have to wait until the Dev Team releases a decoding program, you cannot give the baseband back at the moment.
Those with iPhone 3G who update to iOS 4.0 could activate the phone using redsn0w 0.9.5 beta 5 but I don't know for sure if this is possible because I don't have an iPhone 3G to test. Those with an iPhone 3GS cannot activate the phone by updating to iOS 4.0 because the update process to a jailbroken custom firmware requires a restore to 3.1.2 and if you need activation then you most likely do not have SHSH for firmware 3.1.2 saved .
I hope I covered everyone's questions with this article.
daca am 3g cu 3.1.2. si basseband 04.26.08 pot face un custom de 4.0 si apoi debloca cu ultrasn0w ?
@sebastian: ultrasn0w nu functioneaza pe 4.0.
Pe un 3GS cu bootrom vechi si SHSH salvat se poate pune vers 4 si sa ramana deblocat?
Tel este 3GS soft 3.1.2 cu SHSH salvat si firm 05.11.07 codat pe o retea de afara, am jail si unlock cu blackra1n
3g 3.1.3 05.12.09 05.09 il voi putea debloca?
@TKD29: Teoretic ar trebui sa mearga, practic nu pot sa iti recomand ca e sigur.
@adi: Stii sa citesti? Ce scrie in articol?
sal zaone undeva mai sus am citit eu ca nu ai un iphone 3g pt test daca esty din buc si vreai un iphone 3g pt test eu til pot oferi pe al meu sa faci testele necesare daca cumva vreai si esty interesat lasa-mi un mail cu un nr de tel si vb vedem ce si cum eu tin sa te anunt ca am un iphone 3g 16GB alb cu firmware 3.1.3 pe el si fara unlock basbend 05.12.01 si 5.09 bootloader daca cumva te poate ajuta troaca mea(de care mam saturat fara unlock::((:((:((:(( pt teste sunt diponibil anunta-ma si rezolvam ai aici si id meu dyly_dyly007 sunt on non stop si astept un semn de la tine ms anticipat
@Dyly: Nu sunt din bucuresti, oricum problema se punea cu activarea nu cu decodarea.
am 05.12.01 pe 3.1.3 si am reusit sa-i fac unlock. intrebare: pot sa-l duc in 4 sa-i fac unlock si jailbreak?
Daca e 3G da, daca e 3GS atunci nu.
Multumesc… Am reusit si scriu d pe el… Un 3G… Nu recomand in mod special… Se misca greut…