Release the button when the system LED starts flashing quickly.
Over time, the sticker on the bottom of your router can fade, smudge, or peel off. If you rely solely on the default password and it becomes unreadable, you will be forced to reset the router repeatedly. MERCUSYS AC12G Default Password
Security experts recommend changing your admin password every 6-12 months, or immediately if you suspect unauthorized access. Release the button when the system LED starts
To find the unique default password for your MERCUSYS AC12G: MERCUSYS AC12G Default Password
Type http://mwlogin.net or 192.168.1.1 into the address bar.