Just want to confirm that TP-Link support sent me a beta firmware image for wr902AC. This solved the incompatibility issue with the huawei E3372h-320. All is good now.

@Kevin_Z thank you!

@Kevin_Z - thank you for the reply. 3372h-xxx is in the compatibility list of many countries. I presumed the minor version number does not matter - i.e. must be the same device with some country...

Hi - same issue here. WR902AC v3 (latest firmware from EU site), huawei E3372h-320 . LTE dongle works just fine connected to laptop, connected to WR902AC it tries and tries to identify the usb device...