USB LTE-Stick Recommendation

Hi!

I want to add some LTE USB-sticks to Peplink devices. I am aware of the HCL, but most of the devices are not available or there are issues with the compatibility:

Example: There are so many versions of Huawei E3372 with different firmware. Some are working as “modem”, some as “NAT-router”.

Can you give me any recommendation about a stick, you are using without problems?

Best wishes
KPS