The difference is that the 4G version can insert a SIM card, receive data network Internet access, and at the same time can also receive WIFI signals, use WIFI Internet access, and wifi version is the built-in wireless card template of the tablet, you can connect to wifi Internet access, wifi version can not use 4G network. The difference is as follows:
1, 4G version of the body appearance and WiFi version of the same model is exactly the same, but the weight is slightly different. The 4G version weighs 444 grams, slightly heavier than the Wi-Fi version, which weighs 437 grams. There are two differences in the fuselage details, the 4G version of the fuselage has a plastic part at the top of the back, whether silver, gold and deep space gray have this area, the role is to make the iPad Air 2 built-in 4G antenna can have a better reception effect.
2, the right side of the fuselage SIM card slot, 4G version of the packaging box will be attached to a card needle. The 4G version of the iPad Air 2 is identical to the previous generation iPad Air and iPhone 5\/6, and uses a Nano SIM card.
3, is a group of character areas near the charging interface on the back, the main difference is the model.
The 4g version of the tablet can connect to wifi networks.
All tablets come with a wireless card device that supports connections to wifi network signals.