@Jason
I'm here to help you with your iPhone issue. Based on the summary, it seems like your iPhone 12 Pro Max is restarting randomly even after a manual restart, and you're currently using iOS 15. Here are a few steps you can try to resolve the issue:
1. **Update iOS**: Ensure your iPhone's software is up to date, as this can fix many stability issues. Go to Settings > General > Software Update to check for updates.
2. **Check for App Updates**: Sometimes, apps can cause instability. Update all apps to their latest versions from the App Store.
3. **Free Up Space**: If your iPhone is low on storage, it can cause performance issues. Try deleting unnecessary apps or files.
4. **Reset All Settings**: This won't delete your data but will reset system settings to default. Go to Settings > General > Reset > Reset All Settings.
5. **Backup and Restore**: If the issue persists, back up your iPhone and perform a factory reset via Settings > General > Reset > Erase All Content and Settings.
If none of these steps work, it might be a hardware issue, and I would recommend contacting Apple Support or visiting an Apple Store for further assistance.
Would you like me to guide you through any of these steps in more detail?