Question [Q]External lte module for wi-fi only tablet?

I want to buy "Xiaomi MiPad".
BUT this product doesn't have LTE module.
I need LTE or 3g function.
Are there external lte module for wi-fi only tablet?

ameblo.jp/tobiuo-sisyo/entry-11710652710.html
(Japanese souse)
This blogger says compatible tablet can correspond external 3g module.
Can I use this module in MiPad?

I'm sorry for my bad English.