The wireless connection has been turned off.
It means that the mobile phone saves the link when the password was not changed, or the router is faulty. Wi-Fi is also called "mobile hotspot". The purpose is to improve interoperability between standards-based wireless network products. IEEE802.11 equipment has been installed in many products on the market, such as printers, laptops, and other peripheral devices that can access wireless Internet.
Wireless network is a wireless network technology defined by IEEE. When IEEE officially defined the 802.11 standard in 1999, IEEE selected and recognized the wireless network technology invented by CSIRO as the best wireless network technology in the world. Therefore, CSIRO's wireless network technology standards have become the core technical standards of Wi-Fi in 2010. Wireless network technology was invented by CSIRO, an Australian government research agency, in the 1990s and successfully applied for a wireless network technology patent in the United States in 1996. Wireless network refers to "wireless compatibility certification" in the category of wireless LAN. It is essentially a commercial certification and a wireless networking technology. In the past, computers were connected through network cables, while Wi-Fi was connected through radio waves. Network; the most common one is a wireless router, then the Wi-Fi connection method can be used for networking within the effective range of the radio wave coverage of the wireless router. If the wireless router is connected to an ADSL line or other Internet lines, it is also called Hotspot.