@ginix, sorry about the late reply. Unfortunately, I haven’t had a good way to measure that so far. The LTE signal at my house is rather weak. My setup is for my RV, which is now in storage. I am using it for remote climate and security monitoring when parked, and of course, general internet access while traveling. Stability is a concern for me, but not so much raw throughput. I’m sure I’ll have a better idea once I’ve had a chance to use the setup in different area, but it’ll be a while.
If it’s the speed of the USB port itself you are interested in, maybe using a thumb drive to copy files would be a valid test? Do you have a router to try with? Otherwise I can try to remember next time I have a chance, but again, it might be a while.