Official guidance for the DSL-124 emphasized that firmware should never be updated over a wireless connection; an Ethernet cable was required to prevent the router from becoming inoperable if the Wi-Fi dropped during the process. Security - D-Link Technical Support
Cons
If your version is lower than 1.04, and you are experiencing issues, an update is recommended. D-link Dsl-124 Firmware
: Firmware updates often resolve known issues, such as intermittent Wi-Fi drops, login interface glitches, or compatibility problems with newer client devices. Official guidance for the DSL-124 emphasized that firmware
Firmware updates often reset the router to factory defaults, erasing your ISP credentials and Wi-Fi passwords. Use the Backup/Restore option in the router interface first. and you are experiencing issues