I was using Huawei E220, a very old USB Modem. Yet, running on Ubuntu does not have any problem.
Then I tried the new Huawei E1552 on Windows. Nicer interface. Newer is better. But when I tried it on Ubuntu, yes, Huawei Mobile Partner icon is on the desktop. Can open it. But I cannot connect to internet.
So, in order to solve this problem, I tried to search from Internet. Right, I need USB_ModeSwitch to solve this problem. Reading the page, you will find a lot of steps need to follow.
Whatever they are, I just use Synaptic Package Manager, and install “usb-modeswitch”. Then plug in the Huawei USB Modem, yeah! Now can connect to Internet even using Ubuntu. No command-line needed. Easy.