Post actualizado el día octubre 25, 2026 by DeiviSanzPlay
Changing the router’s WiFi password is one of those tasks that gets put off until something goes wrong: a neighbor piggybacking on the network, a strange device in the connected list, or the suspicion that someone has been using your connection. The good news is that it takes five minutes and doesn’t require technical knowledge. The bad news: every router is a world of its own and there are details that generic guides tend to overlook.
Before touching anything: locate the router’s entry point
Every router has an administration address (the gateway) and factory credentials. The address is usually 192.168.1.1, 192.168.0.1 or 192.168.100.1, and the initial username and password appear printed on a label on the bottom or back of the device. If that label has been erased or the installer changed the details, you can check the gateway from your own phone: on Android, in Settings → WiFi → network details; on iPhone, in the active network’s information. With that IP and the administration credentials you access the control panel.
A detail many overlook: the router’s administration password is not the same as the WiFi password. The first protects the configuration panel; the second is the one you enter on your phone to connect. Changing only the WiFi one leaves the panel accessible with the factory key, something that should also be corrected.
Touring the panel depending on the provider
Routers installed by providers usually have simplified menus. On Movistar, Orange and Vodafone models, the WiFi section appears in the main menu under names like «WLAN,» «Wireless network» or «WiFi.» Inside you’ll find a field for the network name (SSID) and another for the password, usually under «Security» or «WPA Pre-Shared Key.» On third-party routers (TP-Link, Asus, Xiaomi) the menu is more complete and the wireless password is under «Wireless» or «Wireless network.»
Here’s a specific example that comes up often: on Movistar fiber routers with current firmware, the WiFi password is changed in Settings → WiFi → Security, but the system requires restarting the device to apply the change. If you exit the panel without restarting, the device keeps broadcasting with the old key and it seems like it didn’t work. It’s not a router failure: the change is simply pending.
Choose the encryption type and key wisely
In the same security section you’ll see a dropdown with options such as WPA2-PSK, WPA3 or mixed. If your router allows it, WPA2 or WPA3 are the reasonable options; WEP and original WPA are obsolete and are broken with accessible tools. For the password, a phrase of at least 12 characters with uppercase, lowercase and numbers is enough for a household. Avoid birth dates or the name of your street: those are the first combinations that get tried.
Practical consequences of the change
When you save the new password, all connected devices disconnect. You’ll have to re-enter it on your phone, laptop, television, console and, if you have them, smart plugs or surveillance cameras. This is the point where most people get stuck: an IP camera configured two years ago may not reconnect on its own and may require re-pairing from its app. If you have home automation, allow half an hour to check the devices.
There’s also a limit worth acknowledging: changing the WiFi password does not expel an intruder who is already inside the local network if they have physical access to the router or have modified the firmware. In that case, the right move is to update the firmware, review the list of connected devices and, if in doubt, reset the router to factory values and configure it again. According to official documentation from the main manufacturers, a full reset is the only way to guarantee that no rules or users added by third parties remain.
Common mistakes and how to avoid them
- Confusing the WiFi key with the administration one. They are two different accesses and both should be changed.
- Not restarting the router. Many models don’t apply security changes until restart.
- Using problematic special characters. Some older devices fail with symbols like &, % or spaces; if you have connected appliances, try an alphanumeric key first.
- Forgetting the new key. Write it down in a physical place or in a password manager before closing the panel.
What to do if you can’t access the panel
If the administration password isn’t the factory one and you don’t remember it, the router’s reset button (hold it down for about 10 seconds with the device powered on) returns everything to the initial values. That means reconfiguring the internet connection if the router doesn’t obtain it automatically. In fiber installations with a separate ONT, resetting the router doesn’t affect the ONT, but it does affect the local network configuration. According to provider documentation, it’s advisable to have the connection details (PPPoE username and password) on hand before pressing that button, because they don’t always recover on their own.
Finally, if after the change you notice the network is slower or some devices don’t appear, check that you haven’t disabled the 2.4 GHz band or compatibility mode. It’s not a password problem, but it often happens when tinkering in the same menu.
