ProxyPACURL on celluler with non-supervised iPhone?

Contact your IT administrator or MDM provider to obtain the latest MDM profile.

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you
3. If you want to turn on SSL trust for that certificate, go to Settings > General > About > Certificate Trust Settings. Under "Enable full trust for root certificates," turn on trust for the certificate. Apple recommends deploying certificates via Apple Configurator or Mobile Device Management (MDM). --> Trust manually installed certificate profiles in iOS and iPadOS ...

The error message you mentioned, "The new MDM payload does not match the old payload. Mismatched keys: CheckInURL," indicates a mismatch between the Mobile Device Management (MDM) payloads during the installation of an MDM profile on an iPhone. Read for more...

MDM is a technology that allows organizations to remotely manage and configure mobile devices, such as iPhones, iPads, and other mobile platforms. It enables IT administrators to enforce security policies, distribute applications, and manage device settings.

When an MDM profile is installed on an iPhone, it contains various payloads, which are sets of configuration settings and instructions for the device. These payloads specify different aspects of device management, such as security policies, network settings, application restrictions, and more.

The error message suggests that there is a mismatch between the payloads in the new MDM profile and the previous one installed on the device. Specifically, it indicates that the "CheckInURL" key in the new payload does not match the one in the old payload.

The "CheckInURL" is a URL that the device uses to communicate with the MDM server and send status updates, check for commands, and receive configurations. It acts as a crucial connection point between the device and the MDM server.

A mismatch in the "CheckInURL" key could occur due to various reasons, such as:

1. Configuration changes: The MDM administrator might have made changes to the MDM server's configuration, including the "CheckInURL" value, which resulted in a new MDM profile being generated.
2. Profile update or reinstallation: The MDM profile on the device might have been updated or reinstalled, but the new profile contains different configuration settings, including the "CheckInURL" value.

To resolve this issue, you can try the following steps:

1. Remove the existing MDM profile: Go to the "Settings" app on your iPhone, select "General," then "Profiles." Find the existing MDM profile and remove it. This will remove the old payload and associated settings.
2. Reinstall the MDM profile: Contact your IT administrator or MDM provider to obtain the latest MDM profile. Install the new profile on the device, following the provided instructions. Ensure that the new profile contains the correct and updated "CheckInURL" value.

By removing the old profile and installing the new one, you should be able to resolve the mismatched keys issue and establish a proper connection between the device and the MDM server. However, if the problem persists, it would be best to consult with your IT administrator or MDM provider for further assistance and troubleshooting.

How to contact a third-party app developer

If you encounter any challenges with third-party applications, the best course of action is to directly contact the app developer for further assistance. Here's a brief guide on how to do it:

1. Identify the app developer.
2. Visit their website or app store listing.
3. Look for their contact information or support channels.
4. Clearly describe the issue you are facing.
5. Provide any necessary information they may need.
6. Follow their instructions and provide feedback.
7. Be patient and follow up if needed.

By reaching out to the app developer, you increase your chances of receiving accurate and personalized support for the challenges you're experiencing. To contact an App developer --> How to contact an app developer - Apple Support

How to contact a Web Publisher or the Host

Contacting a web publisher or the host of a website can be helpful for various reasons, such as reporting issues with the website, seeking permission to use content, or addressing copyright concerns. The process may vary slightly depending on the website, but here are some general steps you can follow:

1. Check the Website: First, visit the website and look for a "Contact" or "About Us" page. Many websites provide contact information there, including email addresses or contact forms.
2. Web Hosting Company: If you have an issue related to the website's hosting, such as reporting abuse or copyright infringement, you can try contacting the web hosting company. To find the hosting company, you can use online tools like "whoishostingthis.com" or similar services. Once you identify the hosting company, visit their website and look for contact information or support options.
3. Be Clear and Polite: Whether you are reaching out via email, contact form, or social media, always be clear, concise, and polite in your communication. Clearly state the reason for contacting them and provide any necessary details to help them understand your request or concern.
4. Give Time for a Response: Allow some time for the web publisher or hosting company to respond. It may take a few days, depending on their responsiveness.

Remember, always be respectful in your communication, and avoid any hostile or aggressive language, as it is unlikely to yield a positive response.

If this is your personal device then you can update your device with the current iOS

Know how to...

• Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
• Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)

If this is your corporate iPhone, it is important to reach out to the system administrator of your corporate. They will be able to assist you with any issues or concerns related to your device.

However, if it is your personal device, there are a few things to consider. Firstly, check if you have any profiles installed by your corporate, organization, enterprise, or school management. These profiles are typically used to manage certain settings or restrictions on your device.

If you do have a profile installed, and you no longer wish to keep it, you can follow the steps provided by Apple to remove configuration profiles on your iPhone. By doing so, you will eliminate the profile and its associated settings from your device. Install or remove configuration profiles on iPhone - Apple ...

In case you need further guidance or encounter any difficulties during the process, it is recommended to contact the system administrator of the organization that provided the profile to you. They will be able to assist you in removing the profile or addressing any concerns you may have.