Skywire 4G LTE CAT 4 Embedded Modem

NimbeLink’s® patented end-device-certified Skywire® LTE CAT 4 embedded modem is available on both the Verizon and AT&T cellular networks and perfect for high-bandwidth applications. This modem offers the same ultra-small size and Skywire standard interface as other modems in the Skywire family. The CAT4 features a SIM card slot that will accommodate a SIM from either the Verizon or AT&T networks and features HSPA+ fallback.

Like other modems in the Skywire family, our 4G LTE CAT 4 modem is compatible with a variety of NimbeLink development kits and microprocessor shields, allowing fast, easy integration of cellular connectivity into new or existing products. Its standard interface simplifies migration to other cellular technologies, ensuring long product life. In addition Skywire modems end-device certification eliminates the considerable cost, time and risk of the certification process, driving your products to market faster.

Skywire FAQs
Skywire Modems Comparison Chart

Product Brief Documentation Buy Now
  • 4G LTE CAT4 with HSPA+ Fallback
  • Verizon has fall back in Mexico and Canada
  • Carrier certification complete, no additional work required
  • Removable SIM card slot
  • Antenna independent certification increases selection flexibility
  • Connectivity via Serial UART or USB
  • Supports a wide range of I/O voltages for design flexibility
  • Development kits available
  • Skywire standard interface
  • 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]


Skywire cellular modems are the fastest way to get cellular connectivity.

Development Kits

Simplify cellular modem connectivity and prototyping.

View All

Cellular Data Plans

NimbeLink’s data plans utilize most reliable cellular networks.

View All

Comprehensive Support Services

As a NimbeLink customer, you have access to cellular specialists.

View All

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

Buy Now


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 includes baseboard, antenna, power supply, SIM cards, and debug cables. (Doesn't include Skywire modem)

Buy From


SIM card, Verizon, 3FF, Commercial Temp range

Buy From


SIM card, Verizon, 3FF, Industrial Temp range

Buy From


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

Buy From


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

Buy From

Need Help Choosing?

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