Mini PCIe 3G/4G LTE cards and modems

Hardware MikroTik hardware general
1

Hello guys,
I plan to use in a project RB912UAG-2HPnD.
Can I ask you for assistance to choose the right Mini PCIe 3G/4G LTE card (modem)?
Yes, I know there is a list of compatible, but I would like some practical advice.
Thanks!

2

Huawei ME909U-521P - works out of the box as LTE. a bit pricy though.

3

Thank you very much!