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10-27-2013, 10:54 PM #1Successful downgrade to iOS4. Can I go up to iOS5?
I've successfully downgraded my iPhone 3GS from iOS6 to iOS4 without SHSH blobs (I had never jailbroken before and did not have them)
I am wondering if I can go up to iOS5 now without a SHSH blob? This is the version I really want but I could only find successful instructions for going down to 4.
10-28-2013, 03:38 PM #2
If and only if you have an old-bootrom device.
Quick check: if your device's third through fifth characters in its serial number are **9 and then 45 or lower, then you probably have an old-bootrom device. If it's **9 followed by 40 or lower, you almost assuredly do. Anything else, you probably have a new-bootrom device (and will have a hard time keeping an untethered jailbreak without SHSH blobs).
If you do have such a device, use sn0wbreeze for Windows (don't have a good OS X tool, sorry!) to build a custom IPSW file for your device, making sure to select "Old Bootrom" if/when asked.
10-31-2013, 08:30 PM #3
nopes, new bootrom
why must apple be so evil...!