Getting frequent “certificate not trusted” popups on iPhone

If you’re getting frequent “certificate not trusted” popups on your iPhone, it usually means your device doesn’t trust the website or app’s security certificate. To fix this:

1. Make sure your iPhone’s date and time are correct.
2. Update your iOS to the latest version.
3. Avoid using unsecured Wi-Fi networks.
4. If it’s a website, try clearing Safari’s cache or use a different browser.
5. If the problem persists, don’t proceed on that site—it might be unsafe.

1. Is this your corporate/organisation/enterprise/School Management iPhone? Then please contact the system administrator of your corporate//organisation/enterprise/School Management
2. If it is your 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

Interception by a Proxy or Network Filter

• Some Wi-Fi networks, particularly public or corporate ones, intercept and inspect traffic using their own SSL certificates (called HTTPS inspection or MITM proxies).
• If they inject their own certificate in place of Google’s, your iPhone will reject it unless the root certificate is manually installed and trusted.
• It’s rare, but if the actual certificate for *.googlevideo.com is expired, misconfigured, or served incorrectly, iOS will flag it.

ChatGPT says:

*.googlevideo.com is the CDN domain used by YouTube. If you’re seeing it come up with trust issues, some app (like a video downloader, alternate YouTube client, or ad-blocker) might be trying to intercept video streams.

If the *.googlevideo.com certificate on your iPhone is showing as issued by “WR2”, then:

🚨 That Certificate Is NOT Legitimate

WR2 is not a Google certificate authority. The correct issuer for Google certificates should be something like:

• Google Trust Services LLC
• GTS CA 1C3, GTS CA 1P5, etc.

If you’re seeing WR2 (See the Screenshot posted by you), it means:

Your connection is being intercepted by a man-in-the-middle (MITM) proxy, and the proxy is presenting its own certificate in place of Google’s.