iOS 4.2.1

Has your Battery Life Improved in iOS 4.3.3?

Ever since Apple released iOS 4.3, many iPhone users have been reporting a noticeable decrease in battery life from iOS 4.2.1. While further releases tend to help battery life a little bit, users state that their iPhone battery life still doesn’t last as long as it did on iOS 4.2.1 and earlier.
Apple released iOS 4.3.3 earlier this week, and in addition to rectifying the infamous location tracking bug, the update was also supposed to bring battery life improvements. We conducted a similar poll a few days after the release of iOS 4.3.1, and the poll results still showed that iOS 4.3.1 battery life had not improved. 

How to Downgrade iPhone iOS 4.3.2

With the release of iOS 4.3.2 this late last week, and the new iOS 4.3.2 redsn0w jailbreak still not completely stable, some of you might not want to wait any longer for a stable jailbreak, or maybe you’re having additional issues with the new OS. Whatever the reason might be, you can downgrade from your current iOS version to an earlier version using your SHSH blobs on file.

It is important you have your SHSH blobs on file for the iOS version you want to downgrade to. If you don’t have your SHSH blobs on file for the iOS you want to downgrade to, you will not be able to downgrade. You can check which SHSH blobs on file you’ve got by launching Cydia and looking at the top of the Cydia homepage where it lists all your saved SHSH blobs. 

Gevey SIM Interposer Confirmed Working on iPhone 4 on T-Mobile USA

Last week, the Gevey Team announced their SIM Interposer for the iPhone 4. This SIM Interposer would provide the long awaited iPhone 4 unlock or Baseband 2.10.04 and 3.10.01.

Although there was some speculation as to whether this SIM Interposer was legit or not, today a reader over at Redmond Pie has provided evidence showing an iPhone 4 with 2.10.04 baseband running on T-Mobile USA’s network using the Gevey SIM Interposer.

Gevey SIM Interposer Provides Unlock For All iPhone 4s

Remember the days of the TurboSIM, and how that was a popular method for unlocking the iPhone 2G in 2008?

Gevey, one of the companies that was a leading provider of those TurboSIMs has released a SIM Interposer which can unlock the iPhone 4 up to iOS 4.3 by force activating the baseband using the emergency dialer.

Dev Team Investigating New Permanent iPhone Unlock Method

Shortly after breaking the bad news about the iPhone 4 carrier unlock for iOS 4.3, iPhone Dev Team member @MuscleNerd announced that they aren’t giving up just yet and are currently investigating a new method to unlock the iPhone 4.
This method, called the “NCK”, is the key generated by Apple if they were to officially unlock your iPhone. Basically, it’s similar to an IMEI unlock code, which permanently unlocks the phone…

iOS 4.3 vs iOS 4.2.1 Safari Web Browsing Speed Comparison

At Apple’s iPad 2 Event earlier this week, one of the major improvements in iOS 4.3 was Mobile Safari performance.
Steve Jobs claimed that Apple has included the new Nitro JavaScript engine in iOS 4.3 which now powers Safari. According to Apple, the new Nitro JavaScript engine, not only improves web browsing responsiveness, but also runs JavaScript up to twice as fast as iOS 4.2.1, resulting in web pages and interactive features loading faster than ever before.

Dev Team Confirms Existence of New iPhone 4 Unlock

Following up on the report we brought you last night concerning the status of an iPhone 4 Unlock, the Dev Team has essentially confirmed those reports today.

@MuscleNerd, an integral member of the Dev Team, tweeted today that along with an iPhone 4 unlock, an unlock might also be possible for the 3G and the 3GS on some of the newer basebands.

The good news is that he went on to say that “[the iPhone 4] is 1st priority…”

GreenPois0n RC 6.1 Released to Remedy iBooks Problems

As you may have heard, Apple is beginning to get petty with their fight against the jailbreak community.

The latest strategy taken on by Apple is to prevent you from reading the books you purchased on iBooks if it detects a jailbroken iPhone.

@Comex responded first with his hilariously named “Hunnypot” solution, and now the Chronic Dev team has followed suit with the release of GreenPois0n RC 6.1…

How to Jailbreak iPhone 4.2.1 with PwnageTool

The Dev Team just released PwnageTool 4.2, a jailbreak for iOS 4.2.1 for iPhone 3G, iPhone 3GS, and iPhone 4 (AT&T and Verizon), as well as the iPad, Apple TV, and iPod Touch 3G and 4G.

PwnageTool will allow you to jailbreak your iPhone on the latest iOS 4.2.1 while preserving its baseband, thus allowing you to unlock with UltraSn0w, assuming you are still on baseband 01.59.00.

This step by step guide will show you how to jailbreak your iPhone 4.2.1 with PwnageTool, a Mac-only jailbreak for iPhone…

Dev Team Releases PwnageTool Jailbreak for iPhone 4.2.1

The Dev Team just released an updated version of their famous Mac jailbreak, PwnageTool 4.2. This new version of PwnageTool allows you to update your iPhone to a newer firmware while preserving your baseband. PwnageTool is the only jailbreak tool to let you do that, even though there are manual ways to update while preserving the baseband using TinyUmbrella.

In short, PwnageTool is unlockers’ favorite jailbreak as it allows to keep the unlock alive while still updating the iOS.

The Dev Team was able to make a few improvements to PwnageTool, notably a fix for the iBooks problem we reported this morning…

GreenPois0n Jailbreak Updated to RC6

The iPhone 4.2.1 jailbreak tool GreenPois0n has been updated to version RC6. This update brings support for the Apple TV and fixes emulators compatibility issues with GreenPois0n.

Since it came out last week, GreenPois0n has been updated several times, and can now also be used to jailbreak the Verizon iPhone. Although RedSn0w can also provide an untethered jailbreak, GreenPois0n still remains our recommended jailbreak for 4.2.1…