iPhone4 freezes as soon as the screen is locked

1. System firmware compatibility issues.

The mobile phone is the hardware, and the system firmware is the system software, and the system software is responsible for scheduling the hardware operation and providing human-computer interaction with the user. We know that Apple's iOS system is closed, and some people like to crack the restrictions of the iOS system and jailbreak, and they can crack App applications and apps banned by Apple for free. Due to the rewriting of some functions of the iOS system firmware, which affects the compatibility between the original system firmware and the mobile phone hardware, the possibility of automatic shutdown of the Apple mobile phone caused by the system firmware after jailbreaking exists.

The solution to this situation is to re-flash the jailbreak or flash Apple's official system firmware.

2. Application software plug-in compatibility issues.

It is also mentioned above that Apple's iOS system is closed, and all App applications running on the iOS system must be officially certified by Apple, and only the App application software that passes the test can be installed and used by other users in Apple's AppStore. Some apps that affect the security of Apple's system or users are prohibited from being launched by Apple. And jailbroken iPhones lack the ability to install these apps, such as:

Interface beautification, address book management tools, SMS management tools, file management tools and other APP application plug-ins. Since these plug-ins have not been rigorously tested by third parties, they may cause compatibility issues with the system and cause the iPhone to shut down automatically. The solution to this situation is to uninstall the recently installed app plugin.

3. Hardware problems: battery leakage.

The charger of the iPhone mobile phone is 5V, and the charging current is 1A, and the charger voltage of the iPad is also 5V, and the charging current is 2A. If you use a non-original charger, the charging voltage and charging current control are not strict, it will also damage the battery of the iPhone, so that the battery durability of the iPhone will be poor, and the power consumption is very fast.

4. Hardware problem: motherboard power supply IC

It is recommended to bring relevant documents and invoices to the network engineer for inspection and maintenance.

Factory reset doesn't work either? Then upgrade Luo, there is no way.

System firmware compatibility issues.

Application plug-in compatibility issues.

Solution: Force restart: Press the home button + power button at the same time to force the hardware system to restart until you see the Apple logo screen appear on the screen.

If pressing the power button and the home button at the same time does not level the dead iPhone6S, please plug in the power supply and press both buttons at the same time.

In the case that the first two methods are useless, we can only wait for it to run out of power and automatically shut down, and then charge and turn it on.

1. It may be that the mobile phone has been turned on for too long, resulting in excessive consumption of the mobile phone, making the mobile phone easy to freeze.

2. It may be that the mobile phone has been used for too long, the battery is too drained, and the mobile phone is not functioning properly, resulting in the mobile phone crashing.

3. You can turn off the phone and restart it, and try to lock the screen again to see if it still freezes.

4. If shutting down and restarting does not solve the problem, you need to send the phone to Apple's official *** to find a technician to repair it.

It doesn't matter if you crack it or not, as long as your hardware is not broken, there is a problem with the system, just Steps:1Connect your iPhone to the computer, and turn on your iPhone to DFU mode (at that time, the iPhone won't show anything), first press the iPhone to turn off (hold the big circle key and the power button at the same time until the phone turns off), press and hold the big circle key and the power button, keep pressing for 10 seconds, after 10 seconds, let go of the power button, but you still have to press the big circle key until iTunes recognizes the iPhone (if it doesn't work, try a few more times), click Restore in the computer, It will start to restore, and when the iPhone is restored, the iPhone will be repaired.

Reminder: Your iPhone may have some apps that are too versioned or have bugs, and it is best to delete them.

The iPhone 4 black screen of death is generally because the smartphone uses a more powerful intelligent system, and when the system completes too many tasks and the hardware operation cannot be fully satisfied, there will be problems in operation. In the current situation, there are some more reasonable daily use methods to prevent the occurrence of crashes.

1. After turning on a certain function of the phone, most of them do not turn off or exit completely, but directly transfer to the next function. At this point, the phone performs multiple functions at the same time and takes up a lot of internal memory. It is recommended that you completely exit the previous operation before using other functions.

2. Smartphones have a lot of storage space, and try to store more than 1,000 text messages and large-size ** in large-capacity memory or memory cards in use.

This is an incompatibility problem, it will crash when it is installed, and the next time you install it, remove the hook that is installed with the integrated driver, and don't install one, so it's OK. Then just install the driver in what to use to drive the elf or drive the life!

I now have this problem on my phone from time to time, it is a black screen, a black screen for no reason, just like shutting down, what button to press, the problem with this thing can only be a software problem, it can't be a hardware failure if it doesn't fall, and it can't be a hardware failure.

iphone4s is always the first baby of the crash:

1: The device is jailbroken, corrupting the system files.

2: The system version is buggy.

It is recommended to restore the system version to fix the bug issue.

The operation is as follows: Step 2: Connect the iPhone4S to the computer with a data cable.

Step 3: In the summary interface, click "Restore iPhone" and follow the iTunes instructions to restore the system version.

Computer compatibility problems or, it may also be hardware and software problems, you can go to a new one or after-sales service to see.

Machine issues. Go to the service station, many people are like this, and now the 4S problem is getting worse and worse!

Mine freezes whenever I'm online.

If the iPhone freezes and gets stuck, we can try to press and hold the power button on the top for about 5 seconds to see if the phone responds. If the crash is not severe, the phone will enter the lock screen state or restart automatically.

If it doesn't work when we press the power button, we can also try the second method, which is to press and hold the home button and the power button on the home screen together to force the power off of the phone.

If the above two methods don't work, it is a particularly serious crash. At this time, you can connect your phone to a power source or a computer.

Try the third method again.

If that doesn't work, turn it off and let the phone slowly drain the remaining power and turn it off by itself. When the battery is used up, the power is cut off. At this time, we charge the phone again, and after charging to 5%, we can turn it back on.

If none of the above methods can be solved, then please try flashing.