Useful when Ssh is not responding well, or when you want to check the connection with soracom only.
I got the same error as below with cut 1 and it didn't work, but not even with 3.
http://denshikousaku.net/fix-sluggish-response-of-raspberry-pi-wifi-adaptor
Now it's done!
Just set up raspi-blackliset.conf
https://qiita.com/mascii/items/14cccd6c791f43beb492
However, SSH is no longer available via USB.
ssh: Could not resolve hostname raspberrypi.local: nodename nor servname provided, or not known
I had no choice but to undo it and remove the wifi password to force it to not connect over wifi. I found a good way to do that below.
http://portaltan.hatenablog.com/entry/2017/04/24/154253
Ssh connection can be made via USB connection as follows
ssh pi@raspberrypi.local