It seems only the switching (on WiFi mode) from 4G to 3G and network cut is device's faulty (I'll complain about it on vendor). Only mobile broadband works well, but I can't use mobile broadband on Ubuntu.
It seems only the switching (on WiFi mode) from 4G to 3G and network cut is device's faulty (I'll complain about it on vendor). Only mobile broadband works well, but I can't use mobile broadband on Ubuntu.