What is my iPad model?

Model number (on the back cover):

A1474 on the iPad Air Wi-Fi

A1475 on the iPad Air Wi-Fi + Cellular

How to quickly spot the difference

if it match with the model nr on the back cover , iPad Air 1 has no touch id (is just a plastic button )

Model number (on the back cover): 

A1822 on the iPad (5th generation) Wi-Fi

A1823 on the iPad (5th generation) Wi-Fi + Cellular

How to quickly spot the difference

The new iPad Air (5th gen) 2017 has touch id unlike his big brother iPad Air 1 2013/2014 

Model number (on the back cover): 

A1822 on the iPad (5th generation) Wi-Fi

A1823 on the iPad (5th generation) Wi-Fi + Cellular

One of the best methods for external identification is via Model Number. 

Model number (on the back cover):

A1566 on the iPad Air 2

A1567 on the iPad Air 2 Wi-Fi + Cellular

Both iPad looks exactly the same but iPad air 2 is slightly thinner. One of the best methods for external identification is via Model Number.  

Model number (on the back cover):

A1538 on the iPad mini 4

A1550 on the iPad mini 4 Wi-Fi + Cellular

How to quickly spot the difference

iPad mini 4 has no mute switch next to the volume buttons

Model number (on the back cover):

A1599 on the iPad mini 3

A1600 on the iPad mini 3 Wi-Fi + Cellular

How to quickly spot the difference

iPad mini 3 has mute switch next to the volume buttons and also touch id (iPad mini 1 or 2 has no touch id)

Model number (on the back cover):

A1489 on the iPad mini 2 Wi-Fi

A1490 on the iPad mini 2 Wi-Fi + Cellular

A1491 on the iPad mini 2 Wi-Fi + Cellular (TD-LTE)–released early 2014

How to quickly spot the difference

On the back of the iPad you will see 1 tiny hole (check photos) that is an extra microphone, also double check the model number

Model number (on the back cover):

A1432 on the iPad mini Wi-Fi

A1454 on the iPad mini Wi-Fi + Cellular

A1455 on the iPad mini Wi-Fi + Cellular (MM)

How to quickly spot the difference

Both iPads looks the same so if you are unable to read the model nr on the back check for the microphone hole (iPad mini one don't have one)