An iOS device can be in different states. The iOS smart reset detects the device state and automatically selects the best method to erase the device:

1. Not activated. Device is in welcome screen where ‘Hello’ text is shown on device screen.

2. Activated. Device has been activated to normal usage. The screen can be locked with passcode.

3. Recovery mode. The ‘Connect to iTunes’ screen is shown on the device.

4. DFU mode. Device Firmware Upgrade mode.