I picked up my iPhone 4s after it fell into the water, shut it down and left it for two days. When I turned it on, Apple showed me the recovery mode prompt.

iphone4s was dropped into the water and picked up after being turned off and left for two days. When turned on, Apple prompted the recovery mode

After your phone accidentally gets water, it is recommended to do the following:

1. First of all, the mobile phone should be salvaged as soon as possible. If the battery can be removed, take out the battery immediately to prevent short circuit; at the same time, it is best to remove the SIM card to avoid losing contact information. The longer it stays in liquid, the more lifetime damage your phone will suffer.

2. If the phone falls into salt water instead of fresh water, the salt water will form a "salt crust" inside the phone. If it unfortunately falls into seawater or other salty water, you need to gently rinse the phone with fresh water, but first remove the battery and SIM card, and then start the drying process. This can prevent salt crust from causing damage to the internal components of the phone.

4. Gently wipe all parts of the phone with a cloth or paper towel, and avoid shaking the phone excessively to prevent moisture from spreading inside the phone.

5. You can try to wrap the phone with a cloth or paper towel to absorb excess moisture. In addition, use the cool setting of a hair dryer, keep it about 30cm away from the phone, and continue blowing for at least an hour. This can help the phone drain internal moisture and improve the success rate of repair.

Finally, wrap the phone lightly in paper towels and place it in a jar or bag filled with rice. Keep it for at least 24 hours without turning it on. Rice has a strong ability to absorb water and can help repair a damp phone.

7. The above are some emergency treatment methods. If the problem still exists, please contact the after-sales maintenance department for further help as soon as possible.

What to do if error 21 occurs when restoring firmware on iphone

Problem Description:

When using iTunes to restore iPhone/iPad firmware, you may encounter 20/21 error. When this error occurs, iTunes will pop up a dialog box saying "Unknown error occurred while restoring iPhone (20/21)". This error is usually caused by connection issues or software conflicts. To resolve this issue, you can try the following: 1. Check the USB connection: Make sure your iPhone/iPad is properly connected to the computer and the USB cable is not damaged or loose. 2. Update iTunes: Make sure you are using the latest version of iTunes. If not, you can go to the official website to download the latest version and install it. 3.

Solution:

To help players who have not passed the level yet, here is the detailed process of putting iPhone/iPad into DFU mode: 1. Make sure your iPhone/iPad is connected to the computer. 2. Turn off your iPhone/iPad and press and hold the power button for a few seconds until the "Slide to power off" option appears. 3. Slide to shut down the device completely. 4. Press and hold the power button and volume down button until

appears.

Take out your iPhone or iPad and connect it to your computer using a USB cable. Make sure the device has enough power to avoid power outage midway.

In order to help players who have not yet entered DFU mode, let us learn about the specific operation methods. First, press and hold the power button and HOME button on the top at the same time for 10 seconds until the screen turns black. Then, just release the power button, continue to hold the HOME button, and wait another 15 seconds. During this process, you will find that iTunes will recognize that the DFU mode driver is successful, but the screen is still black. At this time, congratulations on successfully entering DFU mode.

At this time, the iPhone appears to be powered off, but in fact it enters a special DFU recovery mode (tip: the screen must remain black).

Open iTunes, and a prompt will appear informing you that an iPhone in recovery mode has been detected. Just click OK.

To restore the selected firmware, hold down the Shift key and use your mouse to click the "Restore" button. This will bring up a window to select firmware. In the pop-up window, release the Shift key and select the firmware you want to restore. After completing these steps, your device will start restoring the selected firmware. This process can help players resolve some issues and allow them to start playing again.

Question supplement:

The probability of occurrence of this kind of problem is not very high, but it can be easily solved by using DFU mode.

What does the error code 21 mean when restoring the iPad system using iTunes

To help players who have not yet passed the level, we can try to hold down the power button and the home button at the same time for 10 seconds, then force shutdown and re-flash, which may solve the problem.

In order to help players who have not passed the level yet, let us learn about the specific puzzle solving methods. First, you need to download the latest version of iTunes on your computer. Make sure you download the latest version, as using an older version may cause unknown errors when reinstalling. This is the first step, let’s move on.

2. Connect the ipad to itunes, shut down the ipad, press and hold the HOME button and the shutdown button at the same time for 10 seconds, release the power button, and continue to hold the home button until you see the device in the DFU state recognized on the computer. The computer After the prompt appears, release the home button, select the recovery option button on itunes, and click to confirm recovery in the pop-up selection box (upgrading through DFU recovery mode will be more thorough and less prone to errors).

Далее iTunes отобразит всплывающее окно с сообщением о том, что весь контент будет удален, а восстановление будет проверено на серверах Apple. После завершения проверки и извлечения файлов iTunes автоматически переустановит загруженную версию прошивки для iPad. Просто подождите, пока установка завершится успешно, а затем повторно активируйте iPad, и проблема будет решена.

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