Skywire® 4G LTE CAT 4 Embedded Modem


The Skywire® LTE CAT 4 embedded modem can be used on either the Verizon or AT&T cellular networks and is effective for high-bandwidth applications. The CAT4 features a SIM card slot that will accommodate a SIM from either the Verizon or AT&T networks and features 2G and 3G fallback.

Skywire embedded modems dramatically reduce the cost, risks and timelines of IoT product development. With known-good RF engineering and fully validated software, Skywire allows you to focus on your application and not engineering cellular radios. Standardized connectivity gives you flexibility to update and alternate radios for new geographies, carriers and technologies. Further, our embedded modems are “End-Device Certified”, meaning your end-product will not need to go through the complex process of carrier certification. This is critical for the first release of your product and each iteration as you obtain market feedback. Skywire modems significantly reduce time-to-market and are ideal for product development through large-scale production. All Skywire modems are patented and backed by industry leading documentation and expert-level product support.

The NL-SW-LTE-S7588-V-B and NL-SW-LTE-S7588-T-C Skywire® modem are end of life. It is not recommended for new design (NRND).

NL-SW-LTE-S7588-X-X Product Change Notification

Skywire FAQs
Skywire Modems Comparison Chart

Product Brief Documentation Buy Now
  • Skywire Form-Factor
  • 4G LTE CAT4 with 3G Fallback
  • All RF Engineering contained within the modem
  • Carrier End-Device certified
  • Removable SIM card slot
  • U.FL port for antenna flexibility
  • Direct module access via Serial UART or USB
  • Multi-Carrier Support on a single device
  • Skywire family pin compatibility
  • RoHS compliant
  • Development kits available
  • Fastest LTE speeds with LTE CAT4 technology
  • FCC certified
  • Fallback to 3G HSPA+
  • Firmware-Over-The-Air (FOTA) management through Sierra Wireless AirVantage
  • Throughput: 150Mbps Download / 42.2Mbps Upload
  • Average: 66 mA
  • Peak: 229 mA
  • Idle: 14 mA
  • Sleep: 11 mA
  • Input Voltage: 3V-5.5V
  • I/O Voltage: 1.65V-5.5V
  • Temperature Range: -40º to 85ºC
  • Dimensions: 29mm x 33mm x 10.5mm
  • RoHS Compliant

Deployable Region

North America


AT&T, Verizon


LTE: B2 [1900], B4[1700], B5[850], B13[700], B17[700]

B2[1900], B5[850]

Quickly Move Remote Data to the Cloud

Skywire Cellular Embedded Modems are the fastest way to get cellular connectivity.

Development Kits

Skywire Development Kits allow direct Skywire embedded modem connection to your circuit board with everything you need for successful prototyping. Start developing today!

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Custom Solutions

Have an idea? Need help getting your product to market? NimbeLink has designed and manufactured hundreds of IoT products, and we can help you too!

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Cellular Data Plans

With our name the price tool, we can help you to build an IoT data plan that will fit your budget.

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Skywire Development Kits


Quickly add cellular connectivity to your system or IoT product with the Skywire Development Kit and our Skywire Embedded Modems.

Our SWDK also includes an antenna, SIM Card, power supply, and debug cables so you can start developing faster.

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OptConnect Case Study

See How Our Customers Use Skywire

OptConnect provides managed end-to-end wireless solutions for tens of thousands of devices including ATMs, retail kiosks, and digital signage. The company’s end-to-end solution includes cellular network connectivity and a secure Network Operations Center that provides 24/7 service monitoring. OptConnect recognized an opportunity to expand its addressable market by developing an affordable and easy to install cellular end device…

Read Case Study

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Skywire® modem, LTE CAT4, AT&T, FW A.2.13


Skywire® modem, LTE CAT4, AT&T, FW A.2.10



Skywire® modem, LTE CAT4, Verizon, FW V.3.15


Skywire® modem, LTE CAT4, Verizon, FW V.3.6



Skywire development kit version 2 includes baseboard, antenna, power supply, AT&T SIM card, and debug cables. (Does not include Skywire modem.)

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SIM card, Verizon, 3FF, Commercial Temp range

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SIM card, Verizon, 3FF, Industrial Temp range

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SIM card, Tri-cut, 2/3/4FF, AT&T, 4G LTE, Commercial Temp range

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SIM card, Tri-cut, 2/3/4FF, Verizon, 4G LTE, Commercial Temp range

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Need Help Choosing?

If you need help selecting a Skywire, or if you have any other questions, please do not hesitate to contact us.