Alfa Network

ALFA Tube-U4G Global v2 4G/LTE Outdoor USB Modem


Pickup available at 2251 NW 41st Street

Usually ready in 1 hour

Important Details about this product (read first)

ALFA Tube-4G v2 is not a Wi-Fi Extender, it is for 4G/Cellular data only and requires a SIM card and line of service from a provider to operate. It does not boost voice call reception or signal, only the 4G data. The device is currently only compatible with T-Mobile in the USA.

ALFA Tube-U4G Global helps increase your 4G data signal.

If you subscribe to a wireless data package with its own SIM card for use in a 4G USB modem from T-Mobile, you can put the SIM inside the Tube-U4G v2 USB WiFi modem, and attach that with the included USB cable to your Microsoft Windows PC. The Tube-U4G can pull in a cellular data signal from a nearby tower often stronger than your phone's 4G data signal and is ideal for use in places where your phone or current USB 4G modem gets a very weak signal, such as 1 bar.

If you are so far from a tower your phone cannot get any 4G LTE signal inside or right outside your structure, this product may not work. It is not Satellite based and you must have a cellular tower for your carrier somewhere in the area. This does not boost signal for voice calls or SMS/MMS, just 4G data.

Think of it as a USB 4G modem on steroids.

This requires you be a customer of T-Mobile with a wireless data plan that has its own SIM card. This does not work off data GBs that come with your normal cell phone plan. You must have a separate wireless broadband data package from one of these carriers with its own SIM card. Though you can pull the SIM from your phone and use that, this means you will not be able to send or receive voice calls while your SIM is in this ALFA modem.

Service Required
This device requires you have active 4G service from T-Mobile. Need help purchasing or activating new service? Our tech support team can help. Click the support button at the top of our web site for email and phone assistance.

Carrier details:
T-Mobile- compatible with prepaid and postpaid plans (may not work until up to 48 hours after SIM activation)

Note that carrier customer service rep, which are commonly outsourced to call centers, are only trained on their own branded devices and will not be familiar with ALFA devices. You can call your carrier customer service to get your service activated, but issues related to getting data over your ALFA Tube-U4Gv2 should be directed toward our customer support.

Included in the box:
- Tube-U4g v2 USB receiver + 5m (16 ft) USB cable
- Cellular antenna for Tube-U4g v2
- Tube-U4g v2 needs no power supply, draws power from computer via USB cable
- waterproof tape and wire ties for mounting Tube to pole

Driver & Docs
Download Install App
Download Installation Manual


Part/Model #: Tube-U4G
Country of Origin:
Manufacturer :
Alfa Network Inc.

Operation Frequencies:
LTE FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B288
LTE TDD: B38/B39/B40/B41
WCDMA: B1/B2/B4/B5/B6/B8/B19
GSM: B2/B3/B5/B8

Supported Countries:

LTE FDD: Max 150 Mbps (DL) / Max 50 Mbps (UL)

LTE TDD: Max 130 Mbps (DL) / Max 35 Mbps (UL)
DC-HSDPA: Max 42 Mbps (DL)
HSUPA: Max 5.76 Mbps (UL)
WCDMA: Max 384 Kbps(DL)/Max 384 Mbps(UL)
EDGE: Max 296 Kbps(DL)/Max 236.8 Kbps(UL)
GPRS: Max 107 Kbps(DL)/Max 85.6 Kbps(UL)

Interface: Mini-USB 2.0, Standard 6 PIN SIM card
Antenna Connector: N type female
Antenna: High-gain 4G/LTE Omni Antenna
LED Indicator: Power/Connection
Waterproof IP rate: IP66
Supported System: Windows XP/Vista/7/8/8.1/10, Windows CE 5.0/6.0/7.0, Linux 2.6/3.x/4.1
Temperature Range: -40 °C ~ 80 °C
Storage Humidity: 5 % ~ 98 % (Non-condensing)
Dimensions: 185 x 47 mm
Weight: 135 g

Warranty & Support:
1-Year Warranty
Complimentary Telephone and Email/Live Chat Support (Click Here)
Online Technical Manuals and Instructions (Click Here)

Sales tax is required in many states and will be added at checkout if applicable to your delivery state. Tax exempt forms can be sent to our support department.

4G modem return policy: This item can be returned for refund within 30 days of receipt. Because range can vary greatly based on your environment, if you are not sure a particular product will meet your range needs please contact us before buying. Orders with free shipping selected will incur a 10% restocking fee to help us cover the original shipping cost unless the item is defective or different from the advertisement. Any expedited shipping charges paid, including return shipping, are non-refundable. Items must be returned the way they were received, in new or like-new condition, with all pieces, documentation, and retail packaging (if applicable) included. For bulk purchases, see our bulk purchase return policy here.

Shipping & Returns
FREE Standard shipping on all items shipped in the USA! 
We are in Florida and ship to: USA, Australia, Austria, Canada, France, Germany, Israel, Netherlands, and the United Kingdom. Local pickup available in Gainesville, FL

Expedited shipping orders placed before 3PM EST weekdays will ship that day. Standard shipping orders ship within 1 business day.

Sales tax: shipments shipped to states in which we are registered to collect tax will have appropriate tax added at checkout. Tax exempt forms can be sent to our support staff who can activate exemption status. 

Lost packages and insurance

International Shipping:

Shipping options are visible in cart by using the shipping estimator. Transit times posted are estimates. International packages are subject to customs holds and duty payment may be required by your government on delivery. The cost of duty  is not reimbursable. Internatonal shipping charges are not refundable in the event of a return.


See item description for product specific return policies, and return policies vary by item.

Bulk/High Value Order Returns

Due to the labor required to package and ship bulk orders, as well as cost and stock issues involved in replenishing items, bulk orders of 5 pieces or more are not returnable unless the equipment is defective or mis-advertised, or a return period is prenegotiated. For non-defective returns over $500, a restocking fee may be deducted from the refund to cover bank or card processing fees.


Items on backorder or preorder will ship as estimated on the item page. You can cancel an order any time up until shipment. Orders with expedited shipping will arrive in the advertised time after the order ships, not after the order is placed.


If you want to cancel an order, please email or call us at (352) 372-9902. If your item has not been shipped, we will cancel the order and provide a full refund.