Narrowband IoT (NB-IoT) is a low-power cellular connectivity technology designed to connect IoT devices that transmit relatively small amounts of data. As a Low Power Wide Area (LPWA) technology, NB-IoT is designed for applications that prioritize long battery life, reliable connectivity, and broad coverage over high data speeds.
NB-IoT connectivity is particularly well suited for stationary or low-mobility devices deployed in locations where reliable coverage and low power consumption are important. Common applications include smart meters, smart buildings, agriculture, asset monitoring, and smart city infrastructure.
Low power wide area (LPWA) networks are becoming incredibly viable options for IoT due to the ability of both technologies to support long-lasting, lower-complexity devices for up to 10 years, as well as having a large enough bandwidth to support the collection of data across a wide IoT ecosystem.
The two technologies, Narrowband IoT (NB-IoT) and Long Term Machine Type Evolution (LTE-M), both provide benefits of LPWA, including scalability, indoor and outdoor coverage, and low device unit cost, among others. The ability to more simply deploy LPWA networks, according to the GSMA, has the potential to largely contribute to Massive IoT – which is large-scale deployments of low complexity devices driving analytics in fields such as logistics, agriculture, retail, and more.
What Are the Characteristics of NB-IoT?
An NB-IoT network is a cellular network designed to connect low-power IoT devices using a narrowband radio technology. It operates on licensed spectrum and is designed to provide reliable connectivity, extended coverage, and efficient power consumption for IoT applications that transmit relatively small amounts of data.
How does NB-IoT compare to LTE-M? With two similar connectivity technologies, there are a few differences to take into consideration for IoT solutions.
NB-IoT, in addition to LTE-M, is part of the 3GPP standard that aims to make IoT interoperable and reliable. Given that many IoT solutions thrive on lower data transmission with less frequency and are often in remote or moving locations where a long battery life is valued, both LPWA technologies leverage the reliability of cellular connectivity, while optimizing battery life and coverage.
NB-IoT builds on the LTE physical layer and was designed to offer extended coverage. Single-tone transmissions allow for enhanced latency in poor coverage areas. This connectivity technology has a strong penetrative signal that allows it to achieve connectivity underground and in rural areas.
Key characteristics of NB-IoT include:
- Low power consumption: Designed to support long battery life for devices that transmit data infrequently.
- Extended coverage: Designed to maintain connectivity in challenging indoor, underground, and remote environments.
- Low device complexity: Uses a narrowband cellular design suited to relatively simple IoT devices.
- Scalability: Supports large deployments of connected devices across applications such as utilities, buildings, and infrastructure.
- Quality of service: Uses licensed cellular spectrum and established cellular network infrastructure to provide managed connectivity.
What Are the Common Use Cases for NB-IoT?
NB-IoT is best suited to applications that send relatively small amounts of data, require long battery life, and benefit from broad or deep cellular coverage. Common NB-IoT use cases include:
- Retail applications for point of sale
- Smart home applications
- Smart cities
- IoT in buildings (alarm systems, HVAC units)
- Agriculture
- Smart metering for utilities
How Does an NB-IoT SIM Connect a Device?
An NB-IoT device uses a SIM or eSIM to authenticate to a supported cellular network and establish connectivity. The specific SIM, network, and provisioning requirements depend on the IoT deployment and connectivity provider.
What Is the Difference Between NB-IoT and LTE-M?
| Feature | NB-IoT | LTE-M |
|---|---|---|
| Data rates | Lower | Higher |
| Mobility | Best suited to stationary or low-mobility devices | Better suited to mobile devices |
| Voice support | Not designed for voice | Supports voice capabilities such as VoLTE |
| Power efficiency | Very high | High |
| Coverage | Strong coverage and penetration | Strong coverage |
| Typical applications | Smart meters, sensors, infrastructure | Fleet tracking, wearables, mobile IoT |
The similarities between LTE-M and NB-IoT are close and it comes down to a few key differences. LTE-M supports voice transmission, whereas NB-IoT does not. LTE-M is also designed for mobility, as it will not lose or drop ongoing data transfers. Additionally, LTE-M has slightly better latency than NB-IoT. Those qualities, however, create drawbacks for LTE-M that it marginally bumps up the complexity of the device, which in turn can raise the device cost and the network connectivity cost.
Overall, NB-IoT is best used for stationary devices that don’t require Voice over LTE (VoLTE) for less device complexity and connectivity cost.
The IoT Connectivity You Need, Simplified
KORE offers a wide range of connectivity solutions, including NB-IoT, LTE-M, LoRaWAN, 4G LTE, and 5G, as well as satellite services. Our unified approach to connectivity through strategic carrier partnerships allows us to offer multi-network and multi-technology connectivity simplified. Our streamlined connectivity management platform, ConnectivityProTM, makes it easy to deploy and manage connectivity, and our suite of OmniSIMTM solutions unlocks global, future-proofed connectivity.
Get more details on the connectivity powering the emerging Massive IoT trend in this KORE webinar, “LPWA IoT Technology Advantages – Catching the Wave.”
Frequently Asked Questions About NB-IoT
What Is NB-IoT Used For?
NB-IoT is best suited for IoT applications that send relatively small amounts of data, require low power consumption, and benefit from broad or deep cellular coverage. Common use cases include smart metering, smart buildings, smart cities, agriculture, retail applications, and infrastructure monitoring.
How Does NB-IoT Work?
NB-IoT uses cellular network technology to connect low-power IoT devices and transmit data to connected applications and platforms. It operates on a narrowband portion of licensed cellular spectrum and is designed to provide reliable connectivity, extended coverage, and efficient power consumption for devices that transmit data infrequently.
What Is the Difference Between NB-IoT and LTE-M?
NB-IoT and LTE-M are both cellular LPWA technologies, but they are designed for different IoT requirements. NB-IoT is generally better suited for stationary or low-mobility devices that send small amounts of data and prioritize low power consumption and coverage. LTE-M supports higher data rates and mobility, making it better suited for applications such as connected vehicles and other mobile IoT devices.
Does NB-IoT Use a SIM Card?
Yes. NB-IoT devices can use a SIM card or eSIM to authenticate to a supported cellular network and establish connectivity. The specific SIM, network, and provisioning requirements depend on the IoT deployment and connectivity provider.
Is NB-IoT Suitable for Mobile Devices?
NB-IoT is generally best suited for stationary or low-mobility IoT devices. LTE-M is typically a better choice for applications that require continuous mobility, higher data rates, or features such as voice connectivity.
Updated September 2026.