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,,,