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List of the contents of this article:

• 1, How to delete the prompt file of the system update on iPhone?
• 2 、How to set the system language to Japanese on Xiaomi mobile phone
• 3, How to flash back the Apple system?
• 4, How to restore the upgraded vivo system to the previous version
• 5. How to project the win10 system projector to the TV
• 6, How to get the cashier system to the mobile phone

How to delete the prompt file of the system update on iPhone?

1. Open the Settings app: First, you need to open the Settings app on your iPhone or iPad.Select the "General" option: In the menu of the "Settings" app, you need to scroll down and find the "General" option. Click it to enter the general settings.

2. First, open the iPhone, find the application settings, and click to enter. After entering the setting page, find the general key and click to enter. Open General, then find the storage space and icloud usage, and click Enter. Open the storage space and icloud usage, and click Manage Storage Space to enter.

3. iPhone can delete the downloaded system update files through the "Settings" app. The first step is to open the "Settings" app on your mobile phone. Find and click the "Settings" icon on the home screen, which is usually displayed as a gear shape. Step two, scroll to the bottom and find the "General" option.Click to enter the option.

4. The system update file automatically downloaded by iPhone can be deleted in "Storage". The specific deletion steps are as follows: Open iPhone Settings - General. Find "Storage and iCloud Usage" and click to enter. Click "Manage Storage" to enter.

How to set the system language to Japanese on Xiaomi mobile phone

1. Open the "Settings" application. Scroll down, find the "System and Device" option, and click on it. Under the "System and Device" tab, find the "Language and Input Method" option. Or, if your system language is Chinese, the option may be marked as "Language and Region". Open the "Language and Input Method" option.

2. Xiaomi mobile phones do not support Japanese, and the MIUI system text currently only supports simplified Chinese, traditional Chinese, English, Tibetan and Uyghur. Take Xiaomi 8 mobile phone as an example, the way to change the system language of Xiaomi mobile phone is as follows: open the settings app on the mobile phone desktop, as shown in the figure below. After entering the settings, select more setting options, as shown in the figure below.

3. Simplified Chinese, Traditional Chinese, English, Tibetan, Uygh; Tibetan and Uyghri are only supported by some models. You can switch languages through: Settings---More Settings---Language and Input Method---Language. If you want to use other languages, it is recommended to flash into the MIUI system package of other languages.

4. Users can download and install Google Japanese input method, Baidu Japanese input method, simple Japanese input method, etc. on their mobile phones.After the user downloads and installs normally, click the Japanese input method icon on the desktop and follow the prompts to set the input method.

5. Hi! At present, the Xiaomi language environment supports Simplified Chinese, Traditional Chinese and English. Setting method: desktop-menu key-system settings-language and input method-language A more detailed description of the problem will help netizens understand the troubles you have encountered and help you solve problems more accurately.

6. Press the space bar for a long time to switch the Japanese and Chinese input methods of Xiaomi mobile phone with one click. First of all, you need to download the Japanese input method in advance in your mobile phone. Secondly, call out the input method, hold down the bottom space bar for 5 seconds, and then you can switch.

How to flash back the Apple system?

1. The first method: use iTunes to restore the old system. First of all, you need to back up your iPhone data so that you can restore the data again when restoring. Connect your iPhone to your computer and open iTunes. In the left menu bar, click the "Overview" tab, and then click the "Check for Updates" button.

2. The reason why DFU should be used is that when the white screen is flashed, it can upgrade and reduce unknown errors without the restrictions of the version. WHEN DOWNLOADING THE FIRMWARE, ITUNES WILL POP UP TO RESTORE. PRESS THE SHIFT KEY, CLICK RESTORE, POP UP THE DIALOG BOX, AND SELECT THE 14 FIRMWARE YOU JUST DOWNLOADED.

3. Whether the iPhone can flash back to the original system depends on whether Apple has turned off the verification of the old version.If it is YES after iOS1, it means that it can also be downgraded. When it is NO, it cannot be downgraded.

How to restore the upgraded vivo system to the previous version

1. In the first step, turn on the mobile phone and find the setting icon on the desktop, and click to enter.The second step is to click more setting options under the settings page. Step three, after switching to more settings pages, click the factory reset option below.

2. The method of restoring the original system of vivo mobile phone is as follows: First, you can download the full package for firmware recovery: you can download the full package corresponding to your model from the vivo official website for firmware recovery.

3. To download the old system, if you want to downgrade to the previous system version, you need to download the corresponding system package first. You can find the old version of the system package on vivo's official website or third-party websites. After the download is completed, save the system package to the memory card of the mobile phone. To enter Recovery mode and downgrade, you need to enter the Recovery mode of the mobile phone.

4. Downgrade firmware package recovery system: download the full package corresponding to the model for firmware recovery.Back up the data in the mobile phone, and the recovery system will clear all the data in the mobile phone. Restore factory settings: You can find the "Backup and Reset" option in the mobile phone settings, and select "Restore Factory Settings" to reset the device to the initial state.

5. To return to the old version of the system on the vivo mobile phone, you generally need to take the following steps: find the applicable old version of the system: visit the official website of vivo mobile phone or other reliable sources to find the old version of the system applicable to your specific mobile phone model. Make sure to choose the correct version to be compatible with your mobile phone model and specifications.

How to project the win10 system to the TV

1. In fact, the method is very simple.Connect the computer and TV to the same network environment (network cable is also available); open AirDroid Cast on the TV, and a set of screen projection codes will appear; open AirDroid Cast on the computer and select to cast; enter the screen projection code on the TV, and the screen can be projected after automatic connection.

2. The first step is to open the win10 menu bar to find the settings. The second step is to open the display - connect to the wireless screen projector. The third step is to search for the device and click to connect. Win10 screen projection is more suitable for PPT, word and other office documents, but the video playback is not stable enough, and there may be stuttering and other phenomena.

3. Press the Win key + P key combination key to open the "Projection" menu. Alternatively, you can open the "Settings" window by right-clicking on the blank space on the desktop and then selecting "Display Settings".In the "Projection" menu, you can choose one of the following four projection options: computer screen only: display images only on your computer screen.

How to get the cashier system to the mobile phone

1. OK. With the development of Internet technology, the cash register system is no longer limited to traditional cash registers or computers. It can be connected to the Kemai cash register system. You only need to install the cashier software APP application on your mobile phone to scan the code to pay.

2. The first step is to open the mobile Alipay wallet. After entering Alipay, click the icon in the upper right corner (used to scan QR codes, barcodes, bank cards). Step 2. After finding the Taobao or Tmall goods you want to buy, enter the Alipay cashier page and choose the payment method to scan the code to pay.Step three, use Alipay money.

3. First of all, open your mobile phone hotspot, and set the name and password of the hotspot, especially the password should be set to pure numbers, which will be easier to enter.

4. There are two ways to buy directly. Many companies on the market that make cashier systems can directly buy ready-made cashier systems.