About DFU mode _
DFU mode stands for Device Firmware Update mode.
What is for DFU mode _
This mode is very useful to change your iDevice’s firmware.Especially, if you want to download and install Cydia free to you iDevice or when you want to jailbreak your iPhones ,you must need boot up to your iPhone 4 with this DFU mode.
How to set DFU mode _
Step 01. Connect iPhone 4 via USB data cable to your PC and start iTunes
Step 02. turn off your iPhone 4 now.
Step 03. Keep holding Home key button (front of the bottom ) and Sleep wake button (top of the iPhone 4) for nearly 10 seconds. After 10 seconds, you can release the Power button, only keep holding Home button until iTunes has detected an iPhone in Recovery Mode message shows on your PC by the dialog box.
Step 04. Now your iPhone 4 is in DFU mode. At this stage, your iPhone 4 is recovering.
Errors about DFU mode _
If you have any problems ,when you try to put your iPhone 4 into DFU mode, you must reduce the time of keep holding Power (Home ) button and Sleep Wake up button together by 9 seconds 8 seconds and last 7 seconds.
DFU mode iDevice _ iPhone 4
About iPhone 4_
Before realizing iPhone 5 series to the market. Few month’s ago best iPhone was iPhone 4. Now also lot of people uses this very much.Reason is ,it has best features for users.Here is little description about iPhone 4.
You can use your iPhone to your own voice with this feature.It is very useful to set reminders ,send a text ,check the weather. These things work only sound of your voice.
02. Dual Core A5 Chip
This for iPhone graphics.As this two cores in the A5 chip gives more power and has increase up to 7 times faster iPhone graphics.becouse of this feature iPhone 4s is best for gamers.
03. 8 megapixels Camera
This feature gives high resolution and details to your images.
04. Video recording in 1080p HD
Can record HD mode at 30 frames per second.Auto white balance,color accurate,temporal sound reduction gives you to take high videos in low light also.
05. iOS mobile operating system
Over two hundred features gives this such as iMessage,Notification Center,Twitter Integration and more.
iCloud helps you to store and manage music, photos, mails, calendars, contacts, applications, documents and more with easy ways.
07. Retina display
This one gives your iPhone high resolution phone display.
08. Face Time
You can see caller face
09. And more
Now, you can upgrade your’s iPhone 4′s firmware up to iOS 5.1.1. Then you can jailbreak it with using Redsn0w 0.9.14b2 tool. At this moment Redsn0w 0.9.14b2 is the esieast tool for jailbreak your’s any iDevices. When you want to put your iPhone 4 into DFU mode, while the jailbreaking to download and install Cydia for free, you can use above step guide.