Safe method for how to unlock iPhone 4.2.1 won’t present itself on its own as the internet space is littered by numerous websites that claim to provide quick unlocking solutions. Before daring to use any of the free solutions recommended by various websites, you should first understand the complexities involved. iPhone users all over the world are interested in knowing unlock iPhone 4.2.1 mainly because the phone can be used with any carrier if it is unlocked. This need for unlocking solutions has attracted scam artists who are interested in making quick bucks by fooling people. The choice of unlock iPhone 4.2 is with you and before trying to find out unlocking method suitable for you, you should spend some time in learning about safe ways for unlocking iPhone 3G 4.2.
How to Unlock updated iPhone versions
The jailbreaking community is always fast and furious and these days, any new iOS upgrade can be jailbroken on the same day of release. However, the initial jailbreak solutions are almost always tethered jailbreak and recent iOS 5 took a really long time for untethered jailbreak. Even though jailbreak iPhone 4 4.2 solutions are quickly available, unlockers have to wait for a much longer time to get a working unlock solution. This path should be treaded carefully because use of wrong jailbreak can result in unlockable iPhone.
Hardware unlocking method was initially popular when it was first introduced. It involves soldering internal chips to bypass Apple’s carrier check. This is the most dangerous method to unlock iPhone 4.2.1 and nobody is willing to do this anymore. SIM unlocking methods are available and you have to purchase expensive unlocking kits that come with unlocking SIM cards and trays. Depending on the kit, you have to use the SIM card and tray to unlock iPhone 4.2.1.
The best way for unlock iPhone 4.2 is to use software based unlocking. The carrier restrictions imposed by Apple are a combination of software and hardware and thus, it is better to use software methods. Using software unlock iPhone 4 4.2, you will be able to quickly unlock your iPhone and use it with any carrier of your choice.
Can you unlock the iPhone 4.2.1 using free software?
On the internet, thousands of websites provide you instructions on how to unlock iPhone 4.2.1 using free software. We know that most of the instructions are not just worth your time and effort and that is why we have compiled a list of instructions to help you with unlocking iPhone 3G 4.2. In order to use the free methods, you must jailbreak iPhone 4 4.2 first and then proceed to install the unlocking software package from Cydia.
Ultrasn0w is the most popular software unlocking package that surpassed Blacksn0w because Ultrasn0w is recently updated. To unlock iPhone 3GS and 3G on 4.2.1, you should first upgrade the baseband to iPad firmware baseband 06.15.00.
- Download 3.2.2 iPad firmware ipsw file. Download iOS 4.2.1 file and download Pwnage Tool 4.1.3.
- Run Pwnage Tool 4.1.3 and browse to select iOS 4.2.1 firmware.
- You will be prompted that iPhone baseband will be upgraded to 06.15.00 and click on Yes.
- In the next window, browse and select iOS 3.2.2 iPad firmware ipsw file and Pwnage Tool will upgrade baseband now.
- Pwnage Tool will prompt that it will build custom ipsw firmware for your iPhone on iOS 4.2.1. Click on Ok to proceed.
- Put your iPhone in DFU mode.
- On iTunes, restore your iOS by pointing to custom built ipsw 4.2.1 firmware generated by Pwnage Tool.
- Launch Cydia.
- Open Manage -> Sources. Edit and Add http://repo666.ultrasn0w.com as a source.
- Install Ultrasn0w and reboot.
If you use Pwnage Tool, your iPhone 3G 4.2 must be activated using factory SIM carrier. Otherwise, you have use other free software methods to hacktivate the phone first before jailbreaking and unlocking.
How to unlock 4.2.1 firmware using reliable computer based software?
As you can see from the above steps, free software for unlocking iPhone 4 4.2 are not easy to follow and the steps can be very ambiguous for beginner unlockers. If you have already jailbroken and unlocked the device, it is better to watch out for baseband versions supported by Ultrasn0w because it is now impossible to downgrade to lower unlockable baseband as Apple has stopped signing older baseband versions. When you unlock iPhone using free software methods, you should never upgrade your iOS firmware because it almost always results in baseband upgrade. The much safer and reliable alternative to free unlock iPhone 4 4.2.1 is computer based software. To know how to unlock iPhone 4.2.1 you only need to know the right way to run the computer based software so that you can quickly jailbreak and unlock the device using visual guide.



Alot of iPhone owners’ first instinct is to try to find free unlock software for iPhone 3G. It is only natural to look for something that is free instead of having to pay to unlock your iPhone. The same motto of life also applies to this idea of using a free iphone 3g unlock solution on your cell phone, and that is that ‘you get what you pay for’ with 
This question is the source of alot of internet chat these days on iphone jailbreak forums. With the release date of the iPhone 4S just passing by, the idea of being able to jailbreak iphone 4S with the latest iphone firmware is being asked by novices and geniuses alike. If you search google for ‘how to unlock iphone 4s‘ you will come across quite a bit different iphone jailbreak instructions. Here is a list of previously used apps which will lead us to finding out how to unlock iphone 4s in the future:
Unfortunately, there isn’t really any free unlock program that still currently shows you How To Unlock iPhone 4 with updated iPhone firmware such as iOS 5.0 which is the new standard iphone version. The most recently example of How To Unlock iPhone 4 For Free was the blackra1n unlock solution developed by GeoHot. This was the one and only free iphone unlock for your iPhone 4 device that was also an untethered jailbreaking process which allowed you to restart your iPhone 4 without needing to jailbreak it again every time. The simlock iPhone 4 had great features and benefits to your iPhone, and very little risk involved in unlocking it. This also applies to someone looking for