It has been few days since Apple released the
iOS 6.1.3 firmware update. Evasi0n jailbreak, that was released earlier, used 6 exploits to jailbreak untethered the iOS 6 firmware.
The exploits were based on the flaw in the time zone system of iOS,
and the evasi0n used this bug mostly. In iOS 6.1.3, Apple patched four
of the six exploits used by the evasi0n tool, making it ineffective.
Jailbreaking and Downgrading IOS 6.1.3 firmware
This means the latest firmware is a big no for those who are looking
to jailbreak or have already jailbroken ios 6.1.2 devices using
evasi0n 1.5.3 tool.
The negative news came along with the beta two of iOS 6.1.3 was seeded
to developers, when the developers saw that the exploits that were used
were fixed. This is when the team warned everyone to stay away from the
update.
Though they hoped that this would not become true, but it did with
the release of iOS 6.1.3. Popular guys in the development jailbreak
community say they still have the exploits, but they are not sure if
they're safe for public use.
However, users who are on A4 devices can still jailbreak them on iOS
6.1.3. This can be done by
downgrading from iOS 6.1.3 to iOS 6.1.2. There is bad news for A5 and other iDevices, as the
downgrade only works on devices with an A4 processors, even if the SSH blogs are saved.
If you have an A4 device, you can perform a downgrade with
redsn0w and saved SHSH blobs. The trick is because of the limera1n exploit.
Compatible devices:
- iPhone 3GS
- iPhone 4
- iPod Touch 4G
Steps to Downgrade iOS 6.1.3 to iOS 6.1.2 firmware
Step 1: Download iOS 6.1.2 from our
downloads page.
Step 2: Download Redsn0w 0.9.15 beta 3.
Step 3: Prepare your SHSH blobs.
Step 4: Start redsn0w and choose Extras (
for Windows, open in admin).
Step 5: Click Even More. Next, click Restore.
Step 6: Now choose the IPSW button by clicking on it and
browse to select the IPSW iOS 6.1.2 firmware file, which was downloaded
in the first step.
Step 7: Once the IPSW file has been selected, redsn0w will
ask you to connect the device to the computer.
Step 8: For those who rely on an
unlock through ultrasn0w, click redsn0w and select prevent baseband update.
Step 9: Now the tool will ask to put the device in DFU mode; just follow on screen
instructions.
Step 10: Once in DFU mode, you'll be redirected to previous screen.
Step 11: Choose the ‘local’ button by clicking on it and choose SHSH blobs for iOS 6.1.2 or if you want redsn0w to fetch SHSH blobs from Cydia, select ‘remote’, but make sure Cydia is holding SHSH blobs first.
Step 12: Click on Next once you've selected the SHSH blobs.
Step 13: Now let the tool downgrade the device to iOS 6.1.2, which will be done automatically.
Step 14: Once completed, the device is going to restart and will be on iOS 6.1.2 firmware.
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