I don't have a ZTE MF271 so can't help with your question. However, here is a link to download the manual:
It seems like the ZTE MF271 was just offered for a short time before going to the MF 275R. I have a MF 275R which works well and has the advantage of external antenna connectors, which I need for my location.
open a browser and put in 192.168.0.1. you will be prompted with a login.
Default use is admin. that should get you into your Hub management UI.
Hope this helps