Today, I was trying to check radio wave condition in the running train ,since the mobile router(Model Number WX03) that I ordered arrived.
my ordered device
Now, I'm living in Tokyo, and in many places (such as train station, department store,restaurant ) of Tokyo any Wi-Fi-enabled devices can receive strong signal.
But, in any underground area or country area, sometimes weak signal.
I go to work by subway
every weekday. I'm under the soil most time of commute.
So, one day I noticed that my WiFi
device didn't receive any signal in the train.
I was trying to check signal in the Subway of Tokyo Metro Yurakucho Line !
In the station, the ticket gates, concourse, and the platforms are located underground.
And in these spot, Signal is good! (↓below)
But we board a train and surf the Web on own devices so we can't search the Web.
Such a simple googling conclude 404 errorin the running train.
(猫 means cat in japanese)
To come to the point,,,
in the running train we can't surf the web on own WiFi
devices ,so only use the 4G LTE