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Get help with your 4G LTE CellSpot.


CellSpot overview

The 4G LTE CellSpot is a mini cell tower in your home or small office, which connects through your high-speed Internet. It creates 4G LTE signal for better indoor coverage, more dependable voice calls, and consistent data speeds.

Your phone or device connects to the CellSpot over 4G LTE and your usage is billed to your account the same as your usage of the larger T-Mobile cellular network. You don't need any indoor signal at home or Wi-Fi.



Service requirements

  • A valid e911 address is required on the line for the service to work. This is for your safety, so emergency services can find your location.
  • Locations must be an area where T-Mobile offers service and has local e911.
  • Only one coverage device is allowed per coverage use address.
    • The address must have no existing CellSpot or signal booster.
    • Multiple CellSpots can be at different addresses in the same area. In this case, the devices will not interfere with one another, but they do not work together (such as not handing off calls between devices). Therefore, multiple devices should not be in close proximity or used alone to address coverage in large buildings.
    • Placing mini-towers in high-traffic areas could lead to call failure when the device is at maximum connections.
  • No existing Wi-Fi or T-Mobile cellular signal needed!

Phone & Internet requirements

  • Supports all 4G LTE capable devices that can connect to the T-Mobile network.
  • Internet with reliable high speeds. Try a speed test when connected to your home internet to check for:
    • Ping / latency: 200 ms (or less)
    • Download: 2 Mbps (or more)
    • Upload: 0.5 Mbps (or more)
    • Bridge mode: enabled
    • UDP ports: 123, 500, and 4500 opened
  • Cable or DSL Internet is recommended. Satellite and cellular Internet are not supported.


Order, cancel, or return

To improve your indoor coverage, visit a T-Mobile store or contact us to discuss the best coverage solution for you. 

  • If you cancel service, port out, or don't want the CellSpot anymore, we'll send you a prepaid shipping label to return it. To return a device, see Return a T-Mobile coverage device.
  • When a line associated with the CellSpot is canceled/ported out, the CellSpot is immediately deactivated. It cannot be reactivated and must be returned.
  • Possible fees may be charged for not returning the device in good condition.


Tech specs

Table of tech specs for the 4G LTE CellSpot
Spec 4G LTE CellSpot
Maximum connections

8 simultaneous users

  • Any T-Mobile customer within range can connect securely, and connections cannot be blocked. Your house guests or office staff can use the CellSpot without any extra setup.
  • Only T-Mobile customers can use the mini tower.
Range Approximately 3,000 square feet

Moving into 4G LTE CellSpot area

Calls started on the T-Mobile cellular network are not automatically handed over to the 4G LTE CellSpot.

When the call is ended, the phone automatically connects to the 4G LTE CellSpot signal.


Leaving 4G LTE CellSpot area

Calls started on the 4G LTE CellSpot automatically hand over to cellular network if a stronger cellular signal becomes available.

Handoff is not guaranteed, due to outdoor network availability and coverage levels.

Devices supported T-Mobile and non-T-Mobile (BYOD) devices that can connect to the T-Mobile network's 4G LTE
Technologies  frequencies


  • Band 2 (1900 MHz) (V2 model only)
  • Band 4 (2100 MHz) (V1 & V2 models)
  • Includes VoLTE

No 2G/3G bands

Data speeds

  • Speeds cannot exceed your Internet provider’s (ISP) data speed.
  • Speed varies based on the connection, device, and simultaneous voice/data sessions.
  • In testing, we've seen up to 60 Mbps down and up to 20 Mbps up.

This will not interfere with Wi-Fi routers.

  • Wi-Fi operates at the frequencies of 2.4GHz or 5GHz.
  • The CellSpot operates at the 1900MHz and 2100MHz frequencies.


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