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Redsn0w Download 4.2.1 Windows Untethered Iphone 3g UPDATED


Redsn0w Download 4.2.1 Windows Untethered iPhone 3G: How to Jailbreak Your iPhone Easily and Safely




If you have an iPhone 3G running iOS 4.2.1 and you want to jailbreak it untethered on Windows, you may be wondering what tool to use and how to do it. In this article, we will show you how to use Redsn0w 0.9.6b4, a free and reliable jailbreaking tool developed by the iPhone Dev Team, to jailbreak your iPhone 3G untethered on Windows in a few simple steps.




redsn0w download 4.2.1 windows untethered iphone 3g



What is Redsn0w and why use it?




Redsn0w is one of the most popular and easy-to-use tools to jailbreak iPhone, iPad and iPod touch on both Mac and Windows. It supports a wide range of iOS versions and devices, and offers various features and options to customize your jailbreak.


Jailbreaking your iPhone allows you to gain full control over your device, enabling you to install apps and tweaks that are not available on the official App Store, change the look and feel of your device, unlock your device for use with any carrier, and more.


Redsn0w 0.9.6b4 is the latest version of Redsn0w that can jailbreak iOS 4.2.1 untethered on iPhone 3G. Untethered means that you don't need to connect your device to a computer every time you reboot it, unlike tethered jailbreaks.


What do you need to jailbreak your iPhone 3G with Redsn0w?




To jailbreak your iPhone 3G with Redsn0w, you will need the following:


  • An iPhone 3G running iOS 4.2.1. You can check your iOS version by going to Settings > General > About > Version on your device.



  • A Windows computer with iTunes 10.1 or later installed.



  • A USB cable to connect your device to your computer.



  • The Redsn0w 0.9.6b4 tool for Windows. You can download it from here.



  • The iOS 4.2.1 firmware file for iPhone 3G. You can download it from here.



How to jailbreak your iPhone 3G with Redsn0w?




To jailbreak your iPhone 3G with Redsn0w, follow these steps:


  • Backup your device using iTunes or iCloud, in case something goes wrong.



  • Extract the Redsn0w zip file that you downloaded and run the redsn0w.exe file as administrator.



  • Click on the Browse button and select the iOS 4.2.1 firmware file that you downloaded.



  • Wait for Redsn0w to identify and process the firmware file.



  • Click on Next when Redsn0w says IPSW successfully identified.



  • Wait for Redsn0w to prepare the jailbreak data.



  • Select the options that you want for your jailbreak. Make sure to check Install Cydia, which is the app store for jailbroken devices. You can also check other options such as Enable multitasking gestures, Enable battery percentage, or Install custom boot logos, if you want.



  • Click on Next when you are done selecting the options.



  • Make sure that your device is turned off and plugged into your computer, then click on Next.



  • Follow the on-screen instructions to put your device into DFU mode. This involves holding down the Power button for 3 seconds, then holding down both the Power and Home buttons for 10 seconds, then releasing the Power button but keep holding the Home button until Redsn0w detects your device.



  • Wait for Redsn0w to jailbreak your device. This may take a few minutes, so be patient and do not disconnect or interrupt your device.



  • Your device will reboot several times during the process, and you will see some code running on the screen. This is normal and expected.



What are the benefits and risks of jailbreaking your iPhone 3G with Redsn0w?




Jailbreaking your iPhone 3G with Redsn0w can bring you many benefits, such as:


  • Access to Cydia, the app store for jailbroken devices, where you can find thousands of apps and tweaks that are not available on the official App Store.



  • Ability to customize your device's appearance, functionality, and performance, by changing themes, icons, fonts, sounds, gestures, animations, and more.



  • Ability to unlock your device for use with any carrier, by installing ultrasn0w or other unlocking tools.



  • Ability to restore to earlier iOS versions, by saving and using SHSH blobs.



  • Ability to run apps that require root access, such as iFile, Terminal, or OpenSSH.



However, jailbreaking your iPhone 3G with Redsn0w also involves some risks, such as:


  • Voiding your device's warranty and losing Apple's support.



  • Exposing your device to security vulnerabilities and malware.



  • Reducing your device's battery life and stability.



  • Bricking your device or losing your data if something goes wrong during the jailbreak process.



  • Breaking some apps or features that rely on Apple's services or restrictions.



Therefore, you should weigh the pros and cons of jailbreaking your iPhone 3G with Redsn0w before you decide to do it. You should also backup your device and follow the instructions carefully to avoid any problems.


How to troubleshoot common issues with Redsn0w?




If you encounter any issues with Redsn0w, such as errors, crashes, or failures, you can try some of these solutions:


  • Make sure you have downloaded the correct version of Redsn0w and the iOS firmware file for your device and iOS version.



  • Make sure you have updated iTunes to the latest version and closed it before running Redsn0w.



  • Make sure you have run Redsn0w as administrator and in XP compatibility mode if you are using Windows.



  • Make sure you have put your device in DFU mode correctly and not in recovery mode.



  • Make sure you have a stable internet connection and disable any antivirus or firewall software that may interfere with Redsn0w.



  • Make sure you have enough battery life on your device and do not disconnect or interrupt it during the jailbreak process.



  • If you have a tethered jailbreak, make sure you boot your device with Redsn0w every time you reboot it or else it may get stuck at the Apple logo or in an unjailbroken state.



If none of these solutions work for you, you can try to restore your device using iTunes and start over. You can also look for help from online forums, groups, or communities that are dedicated to Redsn0w or jailbreaking in general.


How to unlock your iPhone 3G after jailbreaking it with Redsn0w?




If you want to use your iPhone 3G with any carrier, you need to unlock it after jailbreaking it with Redsn0w. Unlocking your iPhone 3G means removing the SIM lock that prevents it from working with other networks.


To unlock your iPhone 3G, you can use ultrasn0w, a free and easy-to-use unlocking tool developed by the iPhone Dev Team. Ultrasn0w can unlock iPhone 3G on baseband 05.15.04 or lower. Baseband is the firmware that controls the cellular functions of your device.


To check your baseband version, go to Settings > General > About > Modem Firmware on your device. If your baseband is higher than 05.15.04, you need to downgrade it using Redsn0w before using ultrasn0w.


To downgrade your baseband using Redsn0w, follow these steps:


  • Run Redsn0w again and select the iOS 4.2.1 firmware file.



  • Click on Next and select Install iPad baseband option.



  • Click on Yes when Redsn0w warns you about the risks of installing iPad baseband.



  • Click on Next and put your device in DFU mode again.



  • Wait for Redsn0w to install iPad baseband on your device.



  • Your device will reboot with baseband 06.15.00, which can be unlocked by ultrasn0w.



To unlock your iPhone 3G using ultrasn0w, follow these steps:


  • Open Cydia on your device and tap on Manage > Sources > Edit > Add.



  • Type http://repo666.ultrasn0w.com and tap on Add Source.



  • Wait for Cydia to update its sources and then search for ultrasn0w.



  • Tap on ultrasn0w and then tap on Install > Confirm.



  • Wait for ultrasn0w to install and then reboot your device.



  • Your device should be unlocked and able to work with any carrier.



How to update your iPhone 3G to iOS 4.2.1 without losing your jailbreak and unlock?




If you want to update your iPhone 3G to iOS 4.2.1 without losing your jailbreak and unlock, you need to use a custom firmware that preserves your baseband. A custom firmware is a modified version of the official iOS firmware that removes the restrictions and updates imposed by Apple.


To create a custom firmware, you can use Redsn0w's Custom IPSW feature, which allows you to create a custom IPSW file that you can restore using iTunes.


To create a custom firmware using Redsn0w, follow these steps:


  • Run Redsn0w and select the iOS 4.2.1 firmware file.



  • Click on Next and select Custom IPSW option.



  • Click on Next and wait for Redsn0w to create a custom IPSW file.



  • The custom IPSW file will have NO_BB_ prefix in its name and will be saved in the same folder as the original IPSW file.



To restore your device using the custom firmware, follow these steps:


  • Connect your device to your computer and open iTunes.



  • Select your device from the left sidebar and click on Restore button while holding down Shift key (Windows) or Option key (Mac).



  • Browse and select the custom IPSW file that you created with Redsn0w.



  • Wait for iTunes to restore your device using the custom firmware.



  • Your device will be updated to iOS 4.2.1 without losing your jailbreak and unlock.



How to backup and restore your iPhone 3G before and after jailbreaking it with Redsn0w?




Before you jailbreak your iPhone 3G with Redsn0w, it is highly recommended that you backup your device using iTunes or iCloud, in case something goes wrong or you want to revert back to the original state. Backing up your device will save your data, settings, apps, and media files.


To backup your device using iTunes, follow these steps:


  • Connect your device to your computer and open iTunes.



  • Select your device from the left sidebar and click on Summary tab.



  • Under Backups section, click on Back Up Now button.



  • Wait for iTunes to backup your device.



  • You can also encrypt your backup by checking Encrypt iPhone backup option and entering a password.



To backup your device using iCloud, follow these steps:


  • On your device, go to Settings > iCloud > Backup.



  • Turn on iCloud Backup if it is not already on.



  • Tap on Back Up Now button.



  • Wait for iCloud to backup your device.



  • You can also manage your iCloud storage and backups by tapping on Manage Storage option.



After you jailbreak your iPhone 3G with Redsn0w, you can restore your device using iTunes or iCloud, if you want to remove the jailbreak or restore your data and settings.


To restore your device using iTunes, follow these steps:


  • Connect your device to your computer and open iTunes.



  • Select your device from the left sidebar and click on Summary tab.



  • Under Backups section, click on Restore Backup button.



  • Select the backup that you want to restore from the drop-down menu.



  • Click on Restore button and wait for iTunes to restore your device.



  • If you have encrypted your backup, you need to enter the password to unlock it.



To restore your device using iCloud, follow these steps:


  • On your device, go to Settings > General > Reset.



  • Tap on Erase All Content and Settings option.



  • Enter your passcode if prompted and confirm your action.



  • Your device will be erased and rebooted.



  • Follow the on-screen instructions to set up your device again.



  • When you reach the Apps & Data screen, tap on Restore from iCloud Backup option.



  • Sign in with your Apple ID and password and select the backup that you want to restore from the list.



  • Wait for iCloud to restore your device.



Conclusion




In this article, we have shown you how to download Redsn0w 4.2.1 for Windows and use it to jailbreak and unlock your iPhone 3G. We have also explained the benefits and risks of jailbreaking your device, as well as how to troubleshoot common issues with Redsn0w. Finally, we have advised you to backup and restore your device before and after jailbreaking it with Redsn0w, to protect your data and settings.


Redsn0w is a powerful and reliable tool that can help you customize your iPhone 3G and enjoy more features and functions that are not available on the official iOS firmware. However, you should also be aware of the potential problems and consequences that may arise from jailbreaking your device, and follow the instructions carefully to avoid any errors or failures.


We hope this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below. d282676c82


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