Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

Keep your discussion in one thread one thread.

NOTE: Reopened thread with clearer topic + clearer problem specifics.

9A405 is the codename for 5.0.1 firmware for devices prior to the A5 Processor. For 4S devices which use A5 it's code name is 9A406.

You need to select the original (not custom with baseband removed) IPSW file in redsn0w before you jailbreak.

Problem: you want to preserve your baseband while upgrading to iOS 5.0.1 9A405, so you create a custom IPSW in redsn0w, install it on your iPhone using iTunes, but then redsn0w won't jailbreak it because it's looking for 9A404 (a developer beta of iOS 5.0).

Solution: this may seem counterintuitive and risky, but it works fine. When you've finished installing the custom IPSW on your iPhone using iTunes and are ready to jailbreak, go to Extras in redsn0w, then Select IPSW, then select the original (not custom with baseband removed) iOS 5.0.1 9A405 IPSW file. You can then jailbreak from the redsn0w main menu and it will not upgrade your baseband.

On another forum I found an answer that worked for me. I saved another copy of 9A405, renamed it 9A404.

Restarted Redsn0w, manually pointed the browser to the renamed file. Redsnow work just fine, along with the changing of the baseband to the Ipad modem for unlocking.