1. Look for a sim card tray on the side to quickly tell if it is cellular enabled. 2. Go to Settings > Cellular. If you do not see cellular under WiFi and Bluetooth, it is not cellular enabled.
WiFi Only, WiFi + Cellular
Go to Settings > General > About > scroll down till you see Capacity.
64 GB, 256 GB, 512 GB
Click on each condition to determine what condition your device is defined as.
Flawless, Good, Fair, Broken, No Power