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How to Reset the Ericsson MBR L21 4G LTE

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Setup Router Staff
(Last Updated: ) | Reading Time: 4 minutes

On this page I will be covering how to reset the Ericsson MBR L21 4G LTE router. This is usually done because of the inability to login to the user interface.

In this guide when I use the word reset I am not referring to a reboot. There is a lot of understandable confusion between the terms reset and reboot. Router manufacturers (or possibly the guide writers) like to use the term reset to mean both a reset and a reboot. In this guide when I use the term reboot I am referring to a cycle in the power to the unit, nothing more. When I use the term reset I am referring to a complete factory restore of all the settings. Every setting you have ever changed is erased and returned to the factory defaults.

Warning: Resetting the Ericsson MBR L21 4G LTE router is a big step and should not be done all the time. You need to reconfigure the router back to the way you want it after a reset is finished. Some of the things you need to consider first are:

  • The router's interface username and password are reverted back to the original factory defaults.
  • The wireless information such as network name and password are reverted back to the original settings.
  • If this is a DSL router you need to re-enter the ISP (Internet Service Provider) username and password. This information can be gotten by calling your local ISP.
  • If you have forwarded ports, setup parental controls, changed IP addresses or anything of that sort you will need to reconfigure it all.

As you can tell, a reset is a major step in troubleshooting a problem. This is why we strongly suggest trying other methods of accessing your router before you continue with a reset.

Other Ericsson MBR L21 4G LTE Guides

This is the reset router guide for the Ericsson MBR L21 4G LTE. We also have the following guides for the same router:

Reset the Ericsson MBR L21 4G LTE

Use a VPN Instead

Have you considered using a VPN instead of forwarding a port? For most users, a VPN is a much simpler and more secure choice than forwarding a port.

We use and recommend NordVPN because not only is it the fastest VPN, it includes a new feature called Meshnet that makes forwarding a port no longer necessary for most applications. With NordVPN Meshnet, you can connect to your devices from anywhere in the world, completely secure, over a highly encrypted VPN tunnel.

When shopping for a VPN, make sure that they meet the following criteria:

  • Your VPN provider should have a no-logs policy. This means that they do not keep any logs of any kind.
  • Make sure that your VPN provider has lots of exit nodes all around the world.
  • Check that your VPN will not affect your speed.
  • Verify that your VPN provider uses WireGuard as the underlying protocol.
  • Many people prefer a VPN provider that is not based in the United States.

This is the list of requirements that we used when we were shopping around for a VPN provider. There are lots of free, shady VPN providers out there that we looked at and dismissed.

Based in Panama, using diskless servers, and with over 6,100 servers in 61 countries, we can safely say that NordVPN satisfies all of these requirements.

NordVPN is the fastest VPN!

Once you've set up your NordVPN account on multiple computers and enabled Meshnet, you can seamlessly access all of your devices as if they were on the same network. You don't even have to log in to your router. It's very simple.

Every time you click on one of our affiliate links, such as NordVPN, we get a little kickback for introducing you to the service. Think of us as your VPN wingman.

The first step in this reset is to find the reset button on the outside of the device.. The reset button/pinhole is located on the back panel. I have located it for you and circled it in red for you in the image below.

router reset factory settings
This is the reset page from your Ericsson MBR L21 4G LTE router.

While the Ericsson MBR L21 4G LTE router is on take a straightened paperclip and press down on the reset button/hole for no less than 30 seconds. Any less than 30 seconds and you end up rebooting the router instead of resetting it like you intended.

Remember a reset like the one I am describing here is going to erase every single setting you have ever changed in the history of this particular router. You should definitely try other troubleshooting methods before you continue with a reset.

Login to the Ericsson MBR L21 4G LTE

Once you've reset the Ericsson MBR L21 4G LTE router you'll want to log into it. This is done by using the factory default IP address, username and password provided for your use in our Login Guide.

Tip: Defaults not logging you in? It could be because the reset button wasn't held down for long enough.

Change Your Password

After you've logged into your router we suggest setting a new password for it. This can be anything you want it to be, however keep in mind that a strong password is 14-20 characters in length and includes no personal information. For more help be sure to take a look through our Choosing a Strong Password Guide.

Tip: Keep from losing your new password by writing it on a sticky note and putting it on the bottom of your router.

Setup WiFi on the Ericsson MBR L21 4G LTE

You can now begin the reconfiguration process. This needs to include the wireless settings. For a great guide on that topic check out our How to Setup WiFi on the Ericsson MBR L21 4G LTE page.

Don't forget to sign up for NordVPN's promo deal before it's gone.

NordVPN faster than ever deal!

You might notice that most of our site doesn't have ads on it. This is because we use partnerships with companies like NordVPN to keep the site running. Thank you for supporting us by using our referral links.

Ericsson MBR L21 4G LTE Help

Be sure to check out our other Ericsson MBR L21 4G LTE info that you might be interested in.

This is the reset router guide for the Ericsson MBR L21 4G LTE. We also have the following guides for the same router: