How to restore a Mercury router to factory settings? Forgot the management password and didn't have a super password; save it first and then reset

last year, I changed the management password for my mom's Mercury D191G. Two months later, I went back to try to go backstage and set a speed limit for the TV box, but I just couldn't remember the password. The admin tried it, tried the WiFi password, and tried the ones I often use, but all the messages popped up saying 'password error.' At the time, I still hoped for 'Mercury Router Super Password' and 'Mercury Background Default Password Collection,' but after searching for a long time, it was all outdated posts and unknown cracking tools. Later, after reading Mercury's official service support documentation, I finally gave up: the exact words were— forgot the management password and can't be recovered. If you can't log into the router's management interface, you can only use the hardware reset . No backdoors, no universal passwords—those small software that claim to crack are either viruses or tricking you into following public accounts.

so this article clearly and cleanly explains how to handle the "can only reset" issue. First, clarify which password you forgot, then what to save before you start, how many seconds you press the reset jack, and how to navigate after resetting. I went through the whole process myself and marked all the pitfalls.

First, figure out which password you've forgotten, don't rush to act

many people want to dig into the reset hole as soon as they say "forgot the password," so they pause for a moment. There are three passwords for accessing the internet at home, and forgetting them has completely different consequences:

WiFi the easiest way to forget your password: you can check it directly on your connected phone or computer; on Android phones, clicking 'share' in the WiFi details will show a QR code; on Apple, you can just scan your face in the password bar; If the backend can still be accessed (meaning you only forgot the WiFi password), just change it and you're done. I previously wrote an article on how to recover the password, and it came out in just a few steps: How to check WiFi forgotten password. Forgetting broadband passwords doesn't cause panic. Calling the carrier to report the installation address can help you find it, and you can also find it in the service center app. The detailed steps are in this article: How to check your forgot broadband account password .

only managing passwords is truly helpless. It's the only key to access the backend. If you lose the key, you can't open the door, and Mercury doesn't leave you a spare key—when the new Mercury is set up for the first time, the wizard forces you to set your own password, but there's no default password in the backend. I've written about the rules for both the new and old models in this article: Mercury router initial password Confirm that the forgotten password is indeed the management password, then continue on.

three things to save before resetting

factory reset is not a reboot, it's a clear empty. Broadband account password, WiFi name and password, device speed limits, kids' internet time, port mapping rules—reset everything to zero and reset each one after another. So before you act, grab as much as you can from the following three things.

the first thing: get the broadband account password. there's a deadlock here—you can't even get into the backstage, where can you copy it? Two sources: one is to check the old installation work order or text messages; searching for "broadband activation" or "installation" usually leads to account information; Second, call customer service to provide the owner's name and installation address, and the account will directly tell you that the password reset was a text message. Don't mind the hassle—if you don't save it, after resetting, your whole family won't have internet access and you'll still have to make this call.

the second item: write down the WiFi name and password. phone is still connected to the router, right? WiFi passwords can be viewed on connected phones (Android shares QR codes, Apple shows password bars), and names go without saying. Why copy it down—when resetting and resetting, the name and password exactly the same fill them back as they are, and the dozen devices at home, including cameras and vacuum cleaners, don't need to reconnect to the network. This is the most time-saving trick. Last time, I used it to reduce the cleanup from one hour to ten minutes.

the third item, check your computer to see if there are any previously exported config.bin. this is the most valuable thing. In the Mercury backend under "Advanced Settings → Device Management → Backup and Import," you can export profile files, which is a small config.bin. If you've backed up before, after resetting and loading it on the same page, your broadband account, WiFi, speed limiting rules, and port mapping are all restored—even the management password from the day you exported it is back. You still remember the password you used when you backed up, right? That is the key. This backup feature itself deserves a separate article. Check out: How to back up and restore router configuration files . If you haven't backed up before, after resetting this time, learn to be good and save a quarterly export to your computer—it takes five seconds.

two paths to restore the factory, choose according to your situation

Route 1: You can still access the backstage. suitable for scenarios where replacements and troubleshooting require active resets. melogin.cn log in to the backend, go to 'Advanced Settings → Device Management → Restore Factory Settings', click the red button, and wait a minute or two for it to restart automatically. By the way, 'Backup and Import' are on the same page. Click 'Import Earlier' to conveniently import the latest one, and if you regret it, you can still download it back.

Route 2: Completely unable to access the backend (forgot the password, that's my type). can only be hardware reset. Keep the router powered , find a SIM ejector or ballpoint pen tip, press against the small hole marked 'Reset' on the device, press and hold it down, and count to about eight seconds—the official limit is 3 to 10 seconds. When you see all the indicator lights go off and flash again, release the device, and it will restart on its own. In less than a minute, it returns to factory settings.

I fell into a pitfall with the time: the first time I pressed it for about three seconds, felt no movement and then loosened, and the router was fine. I thought the machine was malfunctioning. The second time, I obediently held out and counted to eight. The light flickered and flickered, then I let go—and it worked. Two other details: First, you must press when powered on; pressing when off is useless; Second, don't use toothpicks—if they break in the hole, it's awkward. Removing the pin is the smoothest way. WiFi will disconnect while pressing; if you're installing something, choose a free time.

After

reset: the guide completes the five-step process

after rebooting, the router is a blank sheet of paper. Follow the steps below:

• connect to the default WiFi. the wireless list, find the one whose name starts with a string of letters and changes back to MERCURY. Open it without a password, connect directly.
• to the backstage. enter melogin.cn in your mobile browser. If it won't open, try 192.168.1.1—after resetting, the management address return to factory . If you change it to 192.168.0.1 or 2.1, all of them will be void. Don't keep stubbornly sticking to the old address. I've written about the background of changing LAN port IPs: How to change the LAN port IP of a Mercury router .
• set management passwords. new guide requires you to set it up at the first step, and you never skip it. This time, set one you can remember, but don't set the same password as WiFi. Two passwords—one for the backend, one for internet access. If you mix them up, you'll eventually forget.
• choose your internet access method. optical modem dialing (mostly installed by technicians and viewable on TVs), select "Automatic IP Acquisition"; If you want to dial to your own router, select 'Broadband Dial-up for Internet Access' and enter the password for the rescued broadband account. If you can't tell who's dialing, check whether the cable behind the optical modem is plugged into the router's WAN port or the LAN port. If you're unsure, try both options once more. I've written in detail about the three connection modes: How to set up auto-dial on router.
• WiFi name and password are copied from the old one. 2. 4G and 5G are entered separately, with the passwords for both locations being the same; otherwise, you have to enter the device again from one end to the other. The note he copied down came in handy.

can't get online after resetting? Check these three first

the guide will get WiFi after the visit, but if the webpage won't open, don't panic—just follow the instructions. I checked the backend 'Internet Settings' and checked whether the IP was obtained from the WAN port status: if you get an address starting with 192.168, it means the optical modem is dialing and your internet access method was wrong, so you switched to automatic IP acquisition; if you got 0.0.0.0, it's most likely that the broadband account password was miscoded—lowercase L and number 1, uppercase O and digit 0. These two pairs are the hardest-hit areas; I even got the work order wrong once. Second, check if the cable on the optical modem end is still plugged into the WAN port. It's common for the cable to loosen during the reset process. Third, check if the indicator light on the optical modem is normal. If the red light flashes, it means it's on the wiring side. Call for repair. After resetting, I wrote a separate article about a complete checkup from dialing to aftermath, step-by-step steps: What to do if you can't get online after reset .

two things that wrap things up, many people have fallen into this place

to prevent forgetting again. write down a note of the new management password and stick it under the router or inside the weak current box door, so no outsiders can see it at home. Or simply bind your MERCURY ID and manage it through the app, change your password, and use the app without running the backend. If you forget your password, you still have your phone number. Details on binding and remote management are in this article: How to remotely manage Mercury router.

the order of attention for second-hand vehicles. is "first unbind the MERCURY ID in the app, then reset it." If the order is reversed, the machine is still hanging in the cloud, and buyers can't bind it after getting it, and later they'll have to go all the way to redo the process when they come back to argue. Untie first, then reset it—a clean and clean transition. Also, a factory reset is about the configuration. firmware version won't roll back the upgraded firmware is still there, so don't worry about buying it as an old version—for firmware tips, check out this article: How to upgrade the firmware of a Mercury router .

in the end, it comes down to one sentence: identify the forgotten password→ rescue your broadband account and WiFi→ find config.bin→ choose the correct reset method→ guide five steps → stick the note. When it comes to managing passwords, Mercury doesn't leave you a backdoor; keeping your own backup is better than anything.