Getting ‘Unrecognized build’ error message doing tether reboot after jailbraking iPhone 4 to iOS 5.0.1. using redsn0w

[Chellappan]

from past couple of days I am using iPhone 4 and updated with 5.0.1. after that don jailbreak by using redsn0w. then I rebooted the device and perform Just Boot direction in redsn0w and the process is saying exploiting with limerain… after that I tried to verify the build and get an error message ‘Unrecognized build. Done the same thing couple of times and it did not worked for me at all. Any assistance on the above mentioned topic will be appreciated. Thanks a lot in advance.

[Aachman]

Finally I managed to get the root cause of the issue.
You have to click on Select IPSW and mention ios 5.0 IPSW before you click on Just boot in order to jailbreak iPhone. Once you have done you will be able to jailbreak the iPhone of yours.

[Gaganvihari]

Well Redsn0w 0.9.9b8 would not recognize stock iOS 5.0.1 firmware. However you will be able to jailbreak the iPhone 4 on iOS 5.0.1.by making use of Redsn0w 0.9.9.b8. you have to point application manually to the stock iOS 5 firmware. If you have jailbroken your iPhone to iOS 4.2.1then you should check Cydia’s server in case you are having iOS 4.2.1 SHSH blob.