About a month ago, my wifi was sometimes disconnected or abnormally slow.
The wifi router I was using was bought when I started living in my current apartment, so it is more than 6 years old.
According to my research, wi-fi routers are supposed to be replaced by a new standard every two to three years. So the one I had been using was 3 generations old.
So I decided to take the plunge and buy a new one.
The latest standard seems to be 6E, which was just approved last fall. The 6GHz standard is a new addition to the existing 2.4GHz/5GHz standards, but there are still very few compatible devices, and the price is a bit high.
So I decided to purchase a 6E wi-fi router with a good reputation at a price of less than 10,000 yen.
I bought it from amazon in the morning and it was delivered in the evening. I immediately connected it to my modem and tested the communication speed. It was 10 times faster than before. The signal strength is perfect. It was a good decision to buy a new modem.