![]() ![]() ![]() If any of those change it can break the VPN. But one important fact is that when you install VPN it configures itself to the specific hardware, iOS version and network that the phone uses. VPN frequently creates more problems than it solves. They have every detail of your mobile usage, and they are much less trustworthy than Apple. No, what it indicates is that VPN is very persnickety. Sharing in case others find my painful tech journey useful. To test this theory, I removed this Management software and my phone's cellular calls worked perfectly again! So for the final steps, I worked with my company's IT department to reinstall the Management software, which has an updated IOS signing certificate, and the phone is now back to normal. While I don't use a VPN, my iPhone is managed by my company's installation of Microsoft InTune, which I noticed (Settings:General:VPN & Device Mgmt) had a signing certificate () that had expired December 12, 2023. Next, I focused on my company's corporate software, because I was intrigued by the VPN discussion in this forum. Next, Verizon helped me with a new eSIM, but the problem continued. First AppleCare walked me through hardware diagnostics, network resets, backups and restores but the problem persisted. Solved my problem after 8 hours of troubleshooting! After the 17.2.1 update, my iPhone 14 Pro Max would not send or receive calls and got hot from accelerated battery drain. ![]()
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