This was the news which really made me happy as well as there came a huge news to all of the iDevice users who are waiting for the unlock tool for iOS 4.X and iOS 4.2.X , This news didt came for the official announcement but this was seen in an tweet made from MuscleNerd who is the the key member of iPhone Dev Team flashed the news about the Ultrasn0w unlock for iOS 4.2.1
running on iPhone 3GS and 3G which might be released this week itself
We can predict that unlock tool is very soon to be released and probably this week but the development was going on for iPhone 3Gs and iPhone 3G so iPhone 4 users will require to wait for some long time again…
The unlock tool Ultrasnow which will be used to unlock iOS 4.2.1 with all the basebands and but unlock tool for modem firmware 5.15.04 is will unknown..
How to unlock modem firmware 5.15.04 using Ultrasn0w ?
The answer for it is still unknown but there might be a update about it very soon.
hiemanshu: @MuscleNerd any ETA on unlock or should I say unl0ck
MuscleNerd: @hiemanshu now that redsn0w is out, can focus back on the unlock. The 3G/3GS version should be out this week. i4 will be longer.
As you all of know the firmware upgrade upgraded the Basebands which is not supported but the existing UltraSn0w for iOS 4.1 and iOS 4.2.1 as well so this unlock will bring lots of Joy to all.
If you want to jailbreak iOS 4.2.1 please check here in the jailbreak section for jailbreak your iphone ,ipad and ipod touch







I have 3gs,jb with 4.1 base and i want unlock for 05.15.05 base?????
The unlock for modem firmware 05.15.05 is set to be released and seems limesn0w might get released before ultrasn0w but for now there is no unlock toll released yet
I have ios 4.2.1 and firmware 05.15.04 on the ATt network, will i still be able to make and receive calls on the network after JBing the phone?