# problem By [LK](https://paragraph.com/@lk-2) ยท 2022-05-24 --- 1 . Signal interference Reason: there may be strong signal interference sources such as microwave oven, cordless telephone, magnet and high-voltage line next to the router. Radio signals and strong magnetic fields from these devices seriously affect the normal transmission and reception of WiFi signals in routers. Solution: turn off these devices or install the router where there is less interference. 2 . Router firmware problem Cause: if the firmware version of the router is too low or the firmware and hardware do not match, the router may not work normally and the WiFi connection may be unstable. Solution: go to the router's official website to find the latest supported model firmware, and then follow the instructions to upgrade the router firmware. 3 . Mobile wifi function error Cause: there may be errors in designing WiFi software for each mobile phone. For example, when the power saving mode is turned on, the WiFi of the mobile phone will be automatically turned off when it is idle. Or other WiFi equipment fails due to compatibility with the router. Solution: upgrade the mobile phone system to the latest version, turn off energy-saving mode or other options that may turn off WiFi, and then feed back to the mobile phone manufacturer. --- *Originally published on [LK](https://paragraph.com/@lk-2/problem)*