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Check out the details below to get started using your Nokia 5G21 Gateway.

First-time use

Check out Getting Started with T-Mobile Home Internet for steps to get you started.


What's in the box

The Nokia 5G21 Gateway comes with everything you need to get started on your way to enjoying your new device.

  • Nokia 5G21 Gateway
  • AC/DC Power Adapter
  • Ethernet cable
  • Quick Start Guide and Terms & Conditions


About the Nokia 5G21 Gateway

There's a lot you can do with your new device, so here's a quick glance at some basic items:

Buttons and ports


Label with default Wi-Fi network name and password

The default Wi-Fi network name (SSID) and password can be found on the bottom of the Nokia 5G Gateway.


Tech Specs
Technical details of the Nokia 5G21 Gateway
  • Battery size: 5000 mAh
  • Note: The battery is only used to keep the LCD screen lit while placing the gateway. The Wi-Fi and Ethernet connections are disabled.
AC Adapter

100V - 240V

12V / 2A

Dimensions (W x H) 4.72 x 8.50 in (120mm x 216mm)
Operating temperature range -5° – 45° C (23° F – 113° F)
  • Wi-Fi 6 Wi-Fi 802.11 a/b/g/n/ax
  • WPA2 Wi-Fi Security
  • Ethernet plugs 2xRJ-45
  • Tel (RJ-11) and USB-C ports (not currently in use)
  • Maximum recommended devices: 64
  • 5G bands: N41, N71
  • 4G LTE bands: B2, B4, B5, B12, B71, B66


Insert/remove SIM

If you get a replacement, you'll need to move the SIM from your old gateway to your new one.

  1. Power off the gateway and unplug all cables, including power and ethernet, then flip it over.
  2. Using a Phillips head screwdriver, remove the screw from the SIM tray on the bottom of the gateway.
  3. Remove the SIM tray and replace the SIM card, making sure the notched corner is aligned. The SIM only fits in one way.
  4. Reinsert the SIM tray into the device and secure it with the screw.


Understanding the LCD screen

The gateway's LCD is located on the top of the device and allows access to important information quickly. Navigate right or left on the LCD screen to view the following:

Connection (Signal)
  • The gateway displays up to five bars, indicating signal strength. 
  • The number of bars shown represents the strength of the gateway's current connection to the cellular network.
  • An 'X' indicates the gateway is not connected to the cellular network.
  • The number displayed indicates the number of devices currently connected to the gateway (including wireless and wired devices).
  • Use the T-Mobile Home Internet app to see and manage each connected device.
  • The Gateway may be used on battery to help you find a location with the best signal strength.
  • Wi-Fi and Ethernet are not supported on battery power only. 

The Nokia 5G Gateway supports both English and Spanish on the LCD screen. To adjust this setting:

  1. From the Settings screen, select Languages.
  2. Choose English or Español
  3. Select the checkmark to set the language.

The gateway alerts provide device-specific information to which you may need to respond. Choose the alert severity to view specific alerts. 


Messages will display any SMS sent to the Gateway's phone number, including service messages and One Time PINs.

  • Select < and > to move between messages.
  • Select the trash icon to delete a message, then select Yes to confirm.

Notifications can appear at any time during gateway operation. Some are in response to an action you have taken, and others are related to network connection. 


Power & reset

Power button
  • To turn the device off, press and hold the power button for one second.
  • To turn the device on, press the power button.
Reset port


  1. Use a paper clip to press and hold the button in the reset port.
  2. When the LCD screen says Release to reset, remove the paperclip.
  3. Wait while the device restarts.

Factory reset

  1. Use a paper clip to press and hold the button in the reset port.
  2. Continue holding while the LCD screen says Release to reset and counts up to 5.
  3. When the LCD screen says Release button to factory reset, remove the paperclip.
  4. Wait while the device deletes all settings and resets to the factory defaults.
  5. If necessary, follow the steps in Getting Started with T-Mobile Home Internet to setup the device again.


Device tutorials, user guide, and other information

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