Software uses several security algorithms (DoD 5220.22, Gutmann and other). The main purpose of this software is to make impossible recovery of files and folders which was deleted in the past. Anyone can use special recovery software and restore any deleted data (files and folders) because any deleted file still exists on the hard disk until will be overwritten with other data. If you clean computer's Recycle Bin, the files and folders are not deleted forever. Sharing in case others find my painful tech journey useful.Prevents file Recovery If you clean computer's Recycle Bin, the files and folders are not deleted forever. 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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