T-Mobile 5G Gateway (G4AR & G4SE)

Find technical details, tutorial links, and other information about your T-Mobile 5G Gateway.

Need help with your gateway order?

Meet your T-Mobile 5G Gateway (G4AR & G4SE)

For more gateway steps, such as instructions on how to install your SIM or reset your gateway, check out our Tutorials. 

The front of the T-Mobile 5G Gateway with the LCD screen displaying signal

Front View


Reading the gateway label

The label on the back of your gateway includes information about the device and network. 

The default Wi-Fi network name and Wi-Fi password can be found below the IMEI barcode.

The T-Mobile 5G Gateway Label. There is a magenta border around the 3rd and 4th lines, which are the Wi-Fi name and Wi-Fi password

Need help setting up your gateway or changing your default Wi-Fi name and password?

LCD Screen

Press the left or right arrow ( < or > ) on the LCD panel with your finger to move between screens. The illuminated dot on the bottom of the screen indicates where you are in the screen sequence.


  • The gateway displays up to five bars, indicating signal strength. 
  • The number of bars 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.

Internet Line Number

The Internet Line Number screen displays your internet number when the SIM card is installed.


The Messages screen allows you to view the message contents by using the left and right arrows to scroll between messages. 

To delete a message:

  1. Press O (OK) on the panel to select VIEW MESSAGES and view unread messages.
  2. Select NEXT and read next message.
  3. Select DONE when you have read all messages.
  4. Select DELETE to delete a message.
  5. When prompted with a message asking you to confirm deletion, select YES to confirm.

You can block messages to your gateway through your T-Mobile account. See Message Blocking for details.

Language Settings

The gateway supports both English and Spanish on the LCD screen. To adjust this setting:

  1. From the Languages screen, select CHANGE
  2. Select English or Español.
  3. Press (OK) button to set the language.

Antenna Settings

The gateway already has an internal embedded antenna, but an optional external antenna can be connected if you can't set up the gateway in the ideal location. To switch to the external antenna:

  1. From the Antenna screen, select CHANGE.
  2. Choose INTERNAL to use the embedded antenna or EXTERNAL to use an external attached antenna. 
  3. Select OK to confirm.

Tech Specs

Technical details of the T-Mobile 5G Gateway

Dimensions (W x H)

228 (H) x 180 (W) x 76 (D) mm


880 g

1.94 lbs

Operating environment

0° – 40° C (32° F – 104° F)


Bluetooth 5.1


Power adapter AC
Power input 100 - 240V, 3A @ DC 15V, 50/60Hz
Theoretical power consumption 45 W
Wi-Fi connectivity

11ax 4x4 2.4G

11ax 4x4 5G

Seamless roaming

Security WPA/WPA2/WPA3

Reset (recessed switch)

Arrow Keys (left/right)

Enter (OK)


TFT LCD Non-Touch Panel


240x320 Resolution

Mobile Band

  • 5G NR: n25, n41, n48, n66, n71, n77 (DoD and C-Band)
  • 4G LTE: B2, B4, B5, B12, B25, B48, B66, B71
Physical Interfaces
  • GE LAN (Yellow)
  • SIM Card Socket (4FF Only)
  • USB Type C x 1 (Regular Power Source)
  • USB Type C x 1 (Data and other USB Port Purpose)
  • External Antenna Connectors (external T-Mobile 5G Antenna attachment port)

Firmware updates

  • Firmware updates are pushed out automatically when available. They can't be manually requested.
  • They're sent out in phases over a few weeks, so not all users get the update at the same time.
  • Updates happen between 1 am and 3 am PST; make sure your gateway is turned on during this time to get the update.
  • Do not restart the gateway when it’s updating. The gateway will automatically restart once the update is complete.

To check firmware version...

  1. From the T-Mobile Internet App, select MORE > Gateway information.
  2. Review the Firmware version.
Firmware version, fixes, and features of the T-Mobile 5G Gateway
Firmware version Fixes & features
1.00.02 Stability improvements
1.00.01 Release version

Set up your T-Mobile 5G Antenna

The T-Mobile 5G Antenna is an external antenna that can be attached to your T-Mobile 5G Gateway (G4AR or G4SE). It will allow you to position your T-Mobile 5G Gateway (G4AR or G4SE) in the most desired and convenient location in your home. For example, if you’re unable to place your gateway in an ideal location according to the T-Mobile Internet App, like in a window or high up on an upper floor or shelf, the 5G Antenna can be placed in the window while connected to the T-Mobile 5G Gateway (G4AR or G4SE).

The front of the T-Mobile 5G Antenna

Order Support

The T-Mobile 5G Antenna is an optional antenna attachment available only for the T-Mobile 5G Gateway (G4AR or G4SE), and is only necessary if you are experiencing poor signal due to limited placement options. The T-Mobile 5G Antenna is available for purchase on t-mobile.com as an accessory-only order, and is not available for purchase in Retail, Care, or Virtual Retail.

Ready to purchase an External Antenna for your T-Mobile 5G Gateway? Shop now >


  1. Attach the 4 suction cups to the back of the antenna mounting bracket by inserting the rubber tip of each suction cup through each slot and locking them into place.
  2. Using the provided wrench, connect the antenna cables to the base of the T-Mobile 5G Gateway (G4AR or G4SE), matching the numbers on the corresponding ports and cables (be careful not to tighten the cables too much, as the connector could get damaged).
  3. Place the antenna on desired window, ideally on an upper floor, by pressing firmly on the suction cups (for best results, make sure the window surface is clean before mounting).
  4. On the T-Mobile 5G Gateway, navigate to the Antenna screen and switch from Internal Antenna to External Antenna (if you disconnect the antenna from the gateway, you will need to change this setting back to Internal Antenna).

Tech Specs

  • Network: 
    • 5G 4x4 MIMO
    • 5G Bands: N25, N41, N48, N66, N71, N77
  • Dimensions: 5.91 x 5.35 x .78 in (150 x 136 x 20mm)
  • Weight: 1.3 lbs
  • Cable: 
    • 4 x 2-meter (6.5 ft) cables
    • SMA Connectors
  • Temperature Range: -40°C - 85°C (-49°F - 185°F)    


If the gateway loses signal when the antenna is attached: 

  1. The T-Mobile 5G Antenna is only compatible with the T-Mobile 5G Gateway (G4AR or G4SE). Make sure you are only connecting the antenna to a compatible gateway.
  2. Make sure the cables are fully screwed into the correct ports. (hand tighten to prevent over tightening.)
  3. Change the antenna settings on the gateway LCD from Internal Antenna to External Antenna (if you have unplugged the External Antenna, you will need to change this setting back to Internal Antenna)
  4. Check placement of the antenna. The antenna is for indoor use only and the back of the antenna (where the window mount bracket is) should face the nearest tower. 
  5. If the gateway loses signal or the signal degrades while the antenna is attached and the steps above have been completed, exchange the antenna.

Need help?

Our Troubleshooting guides can help fix the most common T-Mobile Internet issues, right from the comfort of your home!

Looking for something else?

   Survey Link