iPhone phone needs to log in to the App Store with an overseas Apple ID to download and install. Some Android phones and HarmonyOS phones may encounter prompts such as "security risk", "virus risk", "installation with caution" after downloading the installation package, and cannot complete the installation. You can refer to the following methods to complete the installation.

I. iPhone mobile phone

If you want to download and use overseas App Store applications on iOS devices in Chinese Mainland, you can do it through the following methods (please pay attention to compliance and account security):

1. Switch App Store login account (suitable for existing account users)

1. Enter the App Store
2. Click on the profile photo in the upper right corner
3. Scroll down to the bottom of the page - exit the current account
4. Use overseas Apple ID account and password to complete login. After logging in, it will automatically jump to the App Store in the corresponding area of the ID. Search for the KTX App in the App Store and click the [ GET ] button to complete the download and installation.
5. It is recommended that the account only be logged in to the App Store, without the need to log in to settings and iclou. After completing the KTX App download, switch back to the mainland Apple ID account.

2. Create a new overseas Apple account (the most commonly used solution)

Operating steps

1. Prepare a dedicated mailbox
2. Use Gmail or 163 email (avoid using QQ email, some regions may be restricted).

Register an overseas Apple account

1. Visit the appleid.apple.com in Safari and click "Create your Apple ID".
2. Select the target region (such as US, Japan, Hong Kong, China) in "Country or Region".

Fill in the information:

1. Date of birth: It is recommended to set it to 18 years old or above (to avoid age restrictions).
2. Payment method: If you do not have an international credit card, you can choose "none" (required in some regions, to be used with virtual card or gift card).
3. Billing Address: Real address or a valid address in the target area obtained through an address generation tool (such as AddressGen , for reference only) (street, zip code, phone number must match the regional rules).
4. Verify email and phone number
5. Apple will send a verification code to the email and verify the Chinese mainland phone number through SMS (supported in some regions, if not supported, you can use an overseas phone number or skip it).
6. Log in to overseas app stores
7. Open the App Store, click on the avatar in the upper right corner, log out of the current account, log in to the newly registered overseas Apple account, and you can enter the corresponding regional app store.

II. Huawei Mobilephone

1. Steps to exit Pure Mode:

1. Huawei's Pure Mode aims to restrict the installation of applications that have not been officially certified to ensure system security. To exit, follow these steps:
2. Enter Settings: Open the main screen of your phone and click the "Settings" icon.
3. Enter System and Update: In the Settings menu, select "System and Update".
4. Turn off Pure Mode: Find the "Pure Mode" option and enter, then click the "Exit" button at the bottom.
5. Verify the lock screen password: The system will prompt you to enter the lock screen password (if no password has been set, it needs to be set first), and you can exit the pure mode after confirmation.

Note:

Some models may need to be turned off through "Settings > Apps > Pure Mode". After exiting, the phone will allow the installation of applications from unknown sources, but it may increase security risks. It is recommended to operate with caution.

2. Switch Huawei account service location:

1. If the registered location of Huawei account is different from the current region, you can check the registered location through "Settings > Huawei Account > Settings > About".
2. The registration location cannot be changed directly, but the service location can be switched: go to "Huawei App Store > My > Settings > Country/Region", select the target region and verify.

Clear app store cache:

1. If you still can't use the app after switching, you can try "Settings > Apps & Services > App Management > Huawei App Store > Storage > Delete Data", clear the cache and restart the app store.

3. Steps to lift APP control

Huawei's Application Control Center will restrict sensitive permissions of risky applications. If you need to lift the control:

Remove control through Mobile Manager.

1. Open "Mobile Manager", click "Virus Skill", and enter "Risk Control Center".
2. Select the app to remove control, click "Remove Control", and confirm the operation.

Release control by setting:

1. Go to Settings > Apps & Services > App Management, search for and select the managed app.
2. Click "Permissions" and manually enable the required permissions.
3. Restore app default permissions:
4. If the app is still restricted, you can try "Settings > Apps & Services > App Management > Apps > Storage > Clear Data" to reset the app permissions.

III. Xiaomi Mobilephone

1. Enable "Install unknown apps" permission

1. Xiaomi phones default to restricting the installation of applications from non-official channels. Permissions need to be manually enabled.
2. Enter Settings: Open the main screen of your phone and click the "Settings" icon.
3. Enter Privacy Protection: In the Settings menu, select "Privacy Protection".
4. Special permission settings: Click "Special permission settings" and select "Install unknown applications".
5. Select the application source: In the application list, find the tool for downloading external apps (such as browser, file manager), and turn on the "Allow applications from this source" switch.

Note: Some models may need to be accessed through "Settings > App Settings > System App Settings > Install Unknown Apps", the path is slightly different due to MIUI version 17.

2. Download and install external APP

1. Download APK file: Access a trusted website through a browser or file manager to download the APK file.
2. Install the application: Find the downloaded APK file, click and select "Install".
3. Bypass risk warning: If the system pops up a risk warning, click "Continue installation" or "Continue installation" (some models require entering the lock screen password to confirm).

3. Methods for lifting risk control prompts

1. The risk control prompt for Xiaomi phones is triggered by the system security mechanism and can be lifted by the following methods:
2. Turn off installation monitoring (global settings)
3. Enter Mobile Manager: Open "Mobile Manager" and click "Virus Scan".
4. Turn off installation monitoring: Click the "Settings" icon in the upper right corner, find "Installation Monitoring" and turn it off.

4. Turn off high-risk app reminders

1. Enter Security Center: Open "Security Center" and click "App Lock".
2. Turn off high-risk alerts: Click "Settings" in the upper right corner, find "High-risk App Alerts" and turn it off.
3. Manually trust applications (for individual applications).
4. Go to App Management: Open Settings > App Settings > App Management, search for and select the blocked apps.
5. Grant trusted permissions: Click "Permission Management", find "Install unknown applications" or "Trust this application", and enable permissions.
6. Turn off authentication (reduce installation obstacles)
7. Go to Security & Privacy: Open Settings > Security & Privacy > More Security Settings.
8. Turn off authentication: Find "Authentication required to install unofficial app store apps" and turn off the switch.

IV. OPPO mobile phone

1. Install the core settings of the external APP

The system security mechanism of OPPO phones will restrict the installation of non-official channel applications. To enable permissions, please follow these steps:

ColorOS 12 and above version:

1. Enter Settings: Open the main screen of your phone and click the "Settings" icon.
2. Path selection: Select "Password and Security" > "System Security" > "External Source Applications" in order.
3. Authorized application: Find the tool for downloading APK in the application list (such as browser, file manager), and turn on the "Allow installation" switch.

ColorOS 11.0-11 Version:

• The path is "Settings > Security > Install External Source Apps", and the other steps are the same as above.

ColorOS 7.0-7 Version:

• The path is "Settings > Other Settings > Device and Privacy > Install External Source Apps", select the corresponding app and authorize.

Note:

1. Some models will pop up a "Security Guard" prompt during installation. You can click the icon in the upper right corner to turn off this function, or directly select "Continue Installation" on the installation interface and enter the lock screen password to confirm.
2. If it prompts "App failed security check" during installation, you can try clearing the app store cache (path: Settings > App Management > Store > Storage > Delete Data).

2. Methods for lifting risk control

OPPO's risk control is mainly achieved through system detection and permission restrictions, which can be lifted through the following methods:

Disable global installation detection.

1. Enter Mobile Manager: Open "Mobile Manager" and click "Virus Scan".
2. Turn off detection: Click "Settings" in the upper right corner, find "Install Monitoring" and turn off the switch.
3. Effect: Risk warnings will no longer pop up when installing all applications, but it will reduce system security.

Manually trust applications:

1. Go to App Management: Open Settings > App Management, search for and select the blocked apps.
2. Grant permissions: Click "Permission Management" and manually turn on the "Install unknown applications" or "Trust this application" switch.

Disable system detection function.

1. Go to Settings: Select "System > Software Management > App Permission Management > System Monitoring" in order.
2. Turn off detection: Find options related to "process" and "memory" and turn them off.

Note:

1. After lifting the control, the application may restore access to sensitive data, and the risk should be carefully evaluated.
2. If the app is still blocked, you can try "Settings > App Management > Apps > Storage > Clear Data" to reset the app permissions.

V. vivo mobile phone

1. Install the core settings of the external APP

The installation permission settings for vivo phones vary depending on the system version.

Funtouch OS 4.5 and above:

1. Go to Settings: Open Settings and select Apps and Permissions > Permission Management.
2. Authorized applications: Find "Install unknown applications", select the tool (such as a browser) to download the APK, and turn on the "Allow installation" switch.

Funtouch OS 4.0 and below:

1. The path is "Settings > More Settings > Applications > Install Unknown Sources", just turn on the switch.

Note:

1. Some models will pop up a "Malicious App Detection" prompt during installation. You can click "Still Install" and enter your fingerprint/password to confirm. If the installation fails, you can try to turn off the "Disable installation of malicious apps" option in "Settings > Security & Privacy > More Security Settings > App Installation".

2. Methods for lifting risk control

Vivo's risk management is mainly achieved through iManager and system settings.

Remove control through iManager.

1. Open iManager: Click "iManager" on the main screen, select "App Management" > "Permission Management".
2. Trusted apps: Find the blocked app and manually enable the "Install Unknown Apps" or "Self-Start" permissions.
3. Turn off detection: Return to the iManager homepage, click "Security Detection" > "Settings", turn off "Automated Detection" or "Virus Database Update".

Manually turn off risk warning:

1. Go to Settings: Select Security & Privacy > App Permission Management > Risk Detection in turn.
2. Turn off function: Find "Prohibit installation of malicious applications" or "Risk application management" and turn off the switch.

Remove app isolation:

1. Enter iManager: Click "Security Check > Risk Management Center".
2. Select the quarantined application, click "Release Risk" and confirm.

Note :

1. After lifting the control, it is recommended to regularly use iManager for virus scanning to ensure system security.
2. If the app is still restricted, you can try "Settings > App Management > Apps > Storage > Clear Data" to reset the app permissions.