You can see a message if the device is supervised.

Go to iOS device's 'Settings' > 'General' > 'About'.

To check if your iDevice is supervised or locked, you can: As a buyer, you won't know whether the phone has an MDM profile or not.

This often happens when you purchase second-hand devices online. Part 2: How to Verify If My iDevice Is MDM Locked? 7 Useful Methods to Unlock Android Phone without Password.How to Remove Apple ID from iPhone/iPad without a Password?.With this function, Apple users can add devices in MDM, and organization-owned devices can be enrolled automatically via Apple Business Manager or Apple School Manager. MDM includes upgrading program and system configurations, handling compliance with organizational policies, and remotely managing files. Users can fully control an iOS device via MDM Configuration Profile. IPhone/iPad Remote Management is a feature that enables an administrator to wirelessly configure iPhone/iPad, whether a consumer or an organization operates them. Part 1: What Is Remote Management on iPhone/iPad? Part 6: How to Bypass Remove Management on iPhone/iPad (iOS 13 Only).Part 5: How to Remove Remote Management from iPhone/iPad Settings.

Part 4: How to Unlock Remote Management on iPhone Using 3uTools.Part 3: How to Bypass Remote Management on iPhone/iPad with iOS Unlock.Part 2: How to Verify If My iDevice Is MDM Locked?.Part 1: What Is Remote Management on iPhone/iPad?.

Removing remote management from mac