When we talk about firmware we are referring to the bit of software that you are looking at through your device’s screen. Often people think that there is a problem with their handsets so they take it into the shop to get it fixed. More often than not there is nothing they can do because it isn’t a hardware problem. All software has bugs and because of them, we constantly see new releases issued which are always for being better than the last. To make sure your phone is performing at its best, always check to make sure that it is up to date with the latest installments. This can always be found inside of the settings app. Everything I just mentioned is what is known as official firmware, but this below is a custom. The difference is instead of being given out by the well-known companies, third-party support were the people who created it. Some of these can still be companies themselves, like the Cyanogen team we have just seen developed out of California. It also just reached the milestone of 10,000,000 unique users today, which is great for not only them, but the sector and across brand names.
The custom firmware for the iPhone G is easy to do if you are familiar with unlocking. If you do unlock and have seen the 06.15.00 UltraSn0w 1.2 unlock, then there is a simple way to update to this particular software.
Please Note: The iOS 4.2.1 custom firmware will work for iPhone 3G, iPhone 3GS, iPhone 4, iPod touch 3G, iPod touch 4G, iPad 3G, iPad Wi-Fi and Apple TV 2G. This will only work for people who have 05.13.04 baseband or below.
Before you start this guide you will need to download custom firmware, Redsn0w 0.9.6b and original Apple firmware. All you have to do is download for your device.
Below you will see an activated and an inactivated option. All people with an original carrier SIM card must use the inactivated links, and all people who don’t use select the activated download option.
All the download links you need are available here:
- iPhone 3G Activated or iPhone 3G inactivated.
- 3GS Activated or iPhone 3GS inactivated.
- 4 Activated or iPhone 4 inactivated.
- Apple TV 2G.
Original Apple Firmware:
- Apple TV 2G.
Once you have downloaded all of those things now you can start on the guide. If you have any of the other devices listed, this article is also for you.
Step 1. Connect your iPhone to the computer with the USB cable supplied.
Step 2. Open up Redsn0w that you downloaded earlier and select original firmware, and then click next.
Step 3. Now select the Just Enter pwned DFU mode now on the screen.
Step 4. Close Redsn0w and open iTunes. From the left hand side panel, select your device. Then press Shift + Restore from iTunes and from the menu pick the custom firmware 4.2.1 from the options.
Reboot the Apple device that you are using to complete the task. This is often a mandatory step for many installation guides because it requires a Springboard reset for it to take effect.
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