How does the Apple 4 system use the previous system?

Apple has officially stated that "iOS devices updated to the latest iOS 7 beta will not be able to revert to earlier versions of iOS." Registered development devices will be able to upgrade to a new test version in the future." However, we were able to successfully de-escalate by following these steps.

iOS7 beta revert to ios6** tutorial:

Step 2: Connect your phone to your computer and install the iOS driver.

Step 3: Put your iOS device into DFU mode and follow the steps shown in the figure below. To enter DFU mode, you can press and hold the home button and sleep at the same time as the wake button.

After pressing the button continuously for 10 seconds, then release the button. Keep holding the Home button until your iTunes pops up a message box and it detects your iPhone in recovery mode, after which the screen of your iPhone will remain black.

Step 4: After that you will see a prompt message that your iPhone is in recovery mode, then we select your iOS device from the device, and then click on the Restore iPhone button.

When asked to confirm the recovery, click the OK Recovery button as shown in the image below

Step 6: Finally, we can successfully downgrade the iOS device through iTunes, this process will take about 10-15 minutes, after which we can click OK. After that, your iOS device can be successfully downgraded from iOS 7 to iOS 6.

Although it is not very complicated for iOS 7 to restore to iOS 6 system, it is still recommended here to upgrade iOS 6 to iOS 7 friends, pay attention to backup data before upgrading, and need to have a certain understanding and understanding of the bugs of iOS 7 beta, so as not to toss physical and mental exhaustion, the above is the English version of iTunes for everyone, you can ** Chinese version of the operation.

You can only upgrade, not downgrade.

What you call the problem of re-brushing the system is commonly known as flat brushing.

iPhone4There are conditions for whether the system can be brushed flat, other machines can, and yours may not be. Now the shsh backup has been turned off on Apple's servers. Therefore, whether the flat brush system can be met must meet the following conditions.

First, what version of your machine's native system is.

Was it already there when you got your hands on it, and if not, did you upgrade it through the firmware as a whole when you first upgraded it? Or directly connect to the wireless network on the mobile phone to upgrade.

If the version of your mobile phone was originally upgraded through the mobile phone link to the wireless network, the term is called OTA upgrade, and it cannot be brushed flat at present.

Second, whether the shsh is backed up

Looking at your question, I guess you are a novice, and you don't understand what shsh backup means, so I won't explain it in detail here. If you haven't actively backed up shsh, then it depends on how long your phone jailbreak is. If your phone was jailbroken while Shsh was open on Apple's servers, the Cydia service will automatically back up Shsh for you.

Third, your mobile phone has a locked version or an unlocked version, and there is a baseband problem with a locked version.

To sum up, whether or not you can brush the system requires you to provide some more detailed information. Please DM me and I can explain it to you in more detail.

If you meet the conditions for flat brushing, then using the latest version of the Red Snow software, that is, Redsnow, can provide fool-like brushing operations.

ios4 new factory must be this is all merchant upgrade.

How to upgrade the system of the Apple phone.

There are two ways:

The first is the mobile phone update, which is often referred to as OTA upgrade, which is updated in the settings-general-software update, and the operation steps are prompted.

The second is to connect the computer to iTunes update, which is required to connect to the computer to update, the advantage of this update is that it will back up the mobile phone data, and there will be no information loss caused by upgrade failure. The specific steps are:

1. Make sure you have installed the latest version of iTunes

2. Connect your iPhone to iTunes

3. Make a backup of your iPhone via iTunes on Mac or PC. iCloud backups can't be reverted to earlier versions, including iOS.

5. Hold down the Option key on your Mac and click "View Updates". Or hold down the Shift key on Windows and click "View Updates".

6. Click "Update" to install iOS on your iPhone.

Upgrade tutorial (take itouch as an example, this upgrade method is common to iPhone, etc.):

Official firmware for recovery.

Right-click on the name of the device in the list and select "Backup".

1. Open iTunes and connect the device to the computer through the data cable

2. Press and hold the Shift key on your keyboard (press and hold the Option key on Mac), and click the "Recover" button with the left mouse button

4. Select "Update (Restore)" to start the firmware upgrade

5. In about three minutes, our device has been updated to the ios7 system, and the last step is to restore the backup data to the new system, right-click the mouse.

Click on the name of the device and select "Restore from Backup....”：

Select the time corresponding to the backup to restore.

Hello,Yours is the British version of iPhone4,iPhone4The highest support system,And now Apple's server only has system certification,That is to say, now your iPhone4 cannot be upgraded,Yours can only be the current system,

There is no way to delete it!

You can only make a point mark, such as picking 2 stars.

Then after connecting iTunes.

Just delete the 2-star song.

Here's how;

1. Open iTunes, connect the device to the computer through the data cable (for the new version, press Shift+S to open the sidebar), 2. Then press and hold the Shift key on the keyboard.

For Mac systems, please hold down the Option key), click the "Recover" button with the left mouse button.

For genuine systems, please directly select "Update"), 3. In the pop-up window, select "Restore", iTunes starts to upgrade and update the firmware, 4. After about three minutes, our device has been restored to the system, the last step is to restore the backed up data to the new system, right-click on the name of the device, select the "Restore from Backup" option, 5. Wait for the recovery backup to complete, just upgrade to the firmware after retaining all the data.

Hope it helps.

As follows: the benefits of the iPhone 4 upgrade;

At present, Apple has released it, and the most favored of them is iPhone4, because its change log writes that iPhone4 has been optimized, and many netizens have also responded that it has become smoother after running, of course, there is also data that more strongly proves that iPhone4 upgrade response has become faster.

Hope it helps.