How to Disable Wi-Fi Network on Vivo Modem from Your Phone

With the widespread popularity of high-performance wireless routers and home Mesh networks, many Vivo Fibra subscribers choose to install their own networking hardware to achieve better range and signal stability. However, leaving the default wireless network of the operator's modem active alongside your new router creates severe electromagnetic interference and degrades wireless performance. To disable the Wi-Fi network on a Vivo modem from your phone, you must connect your smartphone to the modem's current wireless network, open a web browser, go to the gateway IP address 192.168.15.1, enter the username "admin" and the administration password found on the label underneath the modem, locate the 2.4 GHz and 5 GHz wireless configuration settings, and select "Disabled" or "Off" for both frequencies. This action prevents signal overlap and allows your new router to operate without wireless interference.

Disabling the native Wi-Fi of your Vivo Fibra modem is an essential step to ensure your new router handles all wireless connections without physical radio frequency conflicts. If you want to learn how to configure other network devices on your phone, read our step-by-step guide on setting up TP-Link routers from your phone or review the correct procedure to reset Intelbras routers using physical buttons.

1. Why Should You Disable the Vivo Fibra Modem Wi-Fi?

The modems supplied by internet service providers like Vivo are hybrid devices. They function as an ONT (Optical Network Terminal) that connects to the fiber optic line, a Layer 3 router that manages local network traffic, and a wireless access point distributing signals on both the 2.4 GHz and 5 GHz bands. While these all-in-one devices work fine for simple setups, they have limited processing power for handling multiple devices and rely on low-gain internal antennas.

When you place a high-performance router (like a TP-Link Deco, ASUS gaming router, or Xiaomi router) next to your Vivo modem and leave both Wi-Fi signals active, your network will likely experience the following technical issues:

• Wireless Signal Interference (Overlapping): Since the radio frequency spectrum is limited, both devices will compete for the same wireless channels, especially on the congested 2.4 GHz band. This overlap causes packet collisions, forcing devices to continuously retransmit data, which leads to higher latency (ping) and slower speeds.
• Wasted Hardware Resources: The Vivo modem will continue to use processor power and RAM to maintain wireless client tables and broadcast its Wi-Fi signal. Disabling the wireless radios reduces the modem's operating temperature and improves its overall stability.
• Double NAT and Client Routing Issues: If you leave the Vivo modem's Wi-Fi active, devices might accidentally connect to it instead of your new router. This separates your devices into different subnets, preventing them from communicating with local network printers, servers, or media players.

2. How to Locate Your Vivo Modem Login Credentials

Before accessing the configuration menus on your phone, you need the administrator credentials for your specific Vivo modem. Vivo uses modems from different manufacturers, most commonly Askey (such as the RTF8115VW or RTF3505VW) and MitraStar (such as the GPT-2741GNAC or HGW-2501GN-R2).

To find these credentials, follow these physical steps:

1. Turn the Vivo modem over to inspect the sticker on the bottom or back of the case.
2. Find the manufacturer's label. It displays the default gateway IP address (typically 192.168.15.1), the default Wi-Fi network name (SSID), and the default Wi-Fi password.
3. Look for a field labeled "Senha de Administração", "Settings Password", or "Senha do Aparelho". This is a unique alphanumeric key (different from your Wi-Fi password) needed to change settings in the admin portal. Note this password down carefully.

3. Step-by-Step Guide: Disabling Vivo Wi-Fi on a Phone

Once you have the administrator password, follow these steps in your phone's web browser (such as Chrome, Safari, or Firefox):

Step 1: Connect your phone to the Vivo modem's Wi-Fi

Open your phone's Wi-Fi settings and connect to the network generated by the Vivo modem. If you have already set up your new router and disconnected from the Vivo Wi-Fi, you will need to reconnect to the Vivo modem's SSID. If the wireless signal is already disabled, you can use an Ethernet cable connected to a computer instead.

Step 2: Enter the modem's IP address

In your mobile browser, type http://192.168.15.1 into the address bar and press Go/Enter. Do not type this into the search bar. If your browser displays a security warning ("Your connection is not private"), tap "Advanced" and select "Proceed to 192.168.15.1 (unsafe)" to load the page.

Step 3: Log in with Admin Credentials

The Vivo login page will load. For most Vivo Fibra modems, the default username is admin. In the password field, enter the unique administrator password from the sticker on the bottom of the modem. The password is case-sensitive, so enter upper and lower case letters exactly as shown. Tap the login button.

Step 4: Navigate to Wireless Settings

Once logged into the control panel (which usually features a blue Vivo-branded interface), tap the menu icon or settings gear. Look for the tabs labeled "Wireless", "Wi-Fi", or "Rede Sem Fio". On modern Askey and MitraStar modems, you will see separate settings for the 2.4 GHz and 5 GHz wireless bands.

Step 5: Turn off the Wireless Radios

In the 2.4 GHz configuration menu, locate the toggle switch or checkbox labeled "Enable Wireless" or "Habilitar Wi-Fi". Turn it to "Disabled" or uncheck the box. Go to the 5 GHz menu and repeat the process. If your modem has an active Guest Network, make sure to disable it as well.

Step 6: Save and Apply Changes

Tap "Save", "Apply", or "Salvar Alterações" at the bottom of the page. The modem will write the new settings to its memory. Because you disabled the Wi-Fi you were connected to, your phone's connection to the Vivo modem will drop immediately. This disconnection confirms the wireless radios have successfully shut down.

4. Troubleshooting Access to the Vivo Modem

If you have trouble loading the admin portal or saving settings on your phone, use this table to find a solution:

5. Setting Up Your Network After Disabling Wi-Fi

Once you disable the wireless radios on your Vivo Fibra modem, you need to ensure your physical and logical network connections are set up correctly to avoid routing issues. This phase is often where users run into technical issues like double NAT. Double NAT occurs when two routers are running NAT services on the same connection. When a device behind the second router attempts to connect to the internet, its packets are translated twice: first by the second router, and then by the primary modem. While simple web browsing continues to function, this setup can break latency-sensitive applications, online gaming matchmaking, VPN tunnels, and port forwarding rules. By turning off the Wi-Fi on the Vivo modem and configuring your second router as the primary access point, you reduce the workload on the Vivo modem's processor and ensure all your internal devices can talk to each other without logical issues.

Connect an Ethernet cable (Cat5e or Cat6) from any LAN port on the back of the Vivo modem to the WAN (Internet) port of your new router or primary Mesh node. Configure your new router's WAN interface to use Dynamic IP (DHCP). The router will automatically receive a private IP address from the Vivo modem and distribute a separate IP range (like 192.168.1.0/24 or 10.0.0.0/24) to your home devices. This setup keeps your network traffic flowing smoothly without wireless interference or device conflicts.

6. Detailed UI Walkthrough: Askey vs MitraStar Interface Differences

Because Vivo uses modems from different manufacturing companies, the design of the user interface (UI) can differ significantly when you log into 192.168.15.1. Navigating these differences on a smartphone screen requires understanding where the manufacturers hide the wireless radio settings:

Managing the Askey Modem Interface (e.g., RTF8115VW)

The Askey user interface is clean, typically featuring a light gray and blue dashboard. Once logged in, the home screen displays a graphical map of your connected clients. To disable the Wi-Fi, tap the menu button in the top-right corner and select "Rede Sem Fio" or "Wireless". You will be taken to a page with tabs for 2.4 GHz and 5 GHz. Scroll down to the status settings and look for the radio button labeled "Desativar" or "Disable". Select this for both bands, scroll to the bottom, and click "Aplicar". The modem will display a saving progress bar for about 30 seconds before applying the changes.

Managing the MitraStar Modem Interface (e.g., GPT-2741GNAC)

The MitraStar interface is more technical and can look cluttered on mobile screens. The home screen displays diagnostic parameters. To disable the wireless networks, you must click on the "Configurações Avançadas" (Advanced Settings) link in the left-hand sidebar. This will open a detailed folder tree. Expand the folder labeled "Network" and click on "Wireless 2.4G". In the main panel, find the checkbox labeled "Active Wireless" and uncheck it. Next, click on the "Wireless 5G" folder and uncheck the corresponding box. Finally, click the "Apply" button at the bottom of the screen. You may need to zoom in on your phone's browser to tap these boxes accurately.

7. Factory Resetting the Vivo Modem if You Get Locked Out

If you make a mistake during configuration, enter the wrong password too many times, or lose access to the admin portal, you can restore the modem to its default settings. A factory reset will wipe all custom configurations, including your disabled Wi-Fi settings, and restore the default SSID and password printed on the sticker:

• Locate the small hole labeled "Reset" on the back panel of your Vivo modem.
• Insert a straightened paperclip or a SIM card ejector tool into the hole.
• Press and hold the button inside for 12 to 15 seconds while the modem is powered on.
• Release the button. All the LED indicator lights on the front panel will flash and then turn off as the modem reboots.
• Wait 3 to 5 minutes for the modem to finish rebooting. The default Wi-Fi networks will be active again, allowing you to log back into 192.168.15.1 and restart the configuration.

Frequently Asked Questions

Can I use the official Vivo app to disable the modem's Wi-Fi?

Yes, you can use the official "Vivo Smart Wi-Fi" or "Meu Vivo" app to manage settings on your phone. However, depending on your modem model or plan, the app might not allow you to disable both wireless bands completely. Accessing the web interface at 192.168.15.1 remains the most reliable method.

Will I lose my Vivo TV or landline phone services if I turn off Wi-Fi?

No. Vivo TV set-top boxes and wired landline phones connected directly to the modem will continue to work normally. Disabling the Wi-Fi only stops the wireless radio signals (2.4 GHz and 5 GHz), leaving your wired internet and phone services active.

If I reset the Vivo modem, will the Wi-Fi turn back on?

Yes. Pressing the physical reset button on the back of the modem restores all settings to their factory defaults. This will re-enable both the 2.4 GHz and 5 GHz Wi-Fi networks using the default names and passwords printed on the sticker.

Can I set my Vivo modem to Bridge Mode using my phone?

Yes, you can configure Bridge Mode by logging into the admin portal at 192.168.15.1 from your phone's browser. However, Bridge Mode can be complicated to set up and may disable other provider services like TV or landline voice. For most home setups, disabling the modem's Wi-Fi is sufficient to prevent wireless conflicts.