NB-IoT & LTE-M connectivity
Energy-efficient IoT connectivity for sensors, meters, and tracking
NB-IoT and LTE-M are mobile IoT technologies for devices that transmit little data, need to operate for a long time on battery power, and require a reliable connection in locations where regular mobile coverage is not always optimal. Examples include smart meters, sensors, alarms, trackers, technical installations, and equipment in basements, wells, outdoor areas, or industrial environments.
With an NB-IoT or LTE-M SIM card from IoTDiscount, you connect devices via the mobile network, without relying on Wi-Fi or a local internet connection. Both technologies operate in licensed mobile spectrum and are specifically developed for large-scale, energy-efficient Machine-to-Machine and IoT applications. The GSMA positions Mobile IoT precisely for devices that require broad coverage, long battery life, low costs, and secure connectivity.
Range, battery and roaming
Both technologies are designed to reduce energy consumption compared to regular 4G or 5G connectivity. In combination with the right hardware, battery capacity, transmission interval, and energy-saving settings — such as Power Saving Mode and extended Discontinuous Reception — a device can operate on battery power for several years.
The actual battery life always depends on the application. Factors such as location coverage, amount of data transmitted, frequency of measurements, GPS usage, temperature, firmware, power design, and the number of network registrations have a major impact on actual consumption.
NB-IoT typically has a slight advantage in deep indoor range and very low power consumption. LTE-M, on the other hand, offers better support for mobility, higher data speeds, and interactive communication. Therefore, NB-IoT can be a strong option for devices in basements, meter cabinets, or underground technical rooms; for mobile assets and applications involving alarm response, LTE-M is often the better choice.
According to its own information, A1 Digital supports 2G, 3G, 4G/LTE, 5G, LTE-M, and NB-IoT within its IoT connectivity portfolio. However, the availability of NB-IoT, LTE-M, and roaming varies by country, network, and device. Therefore, always check in advance whether your target areas and the modem chipset used support the desired technology.
Advice from IoTDiscount
Choose NB-IoT when your device is stationary, transmits small amounts of data, requires maximum battery life, and needs to function in a difficult indoor or underground location. Choose LTE-M when your device moves, needs to respond faster, transmits data more frequently, needs to receive firmware updates, or may require a voice/VoLTE function.
For international applications, we always recommend a field test first. LPWA network availability, roaming capabilities, and NB-IoT/LTE-M behavior vary by country and operator. IoTDiscount is happy to assist you with the selection of the right SIM, modem technology, data bundle, and test setup for your IoT project.
Gerben
Founder IoT Discount
We are happy to assist you further.
Would you like to discuss which IoT SIM, eSIM, data bundle, or connectivity solution best suits your application? The IoT Discount team is ready to provide personal and technical advice.
Contact us without obligation and turn your IoT ambition into a reliable, scalable solution.
An IoT SIM for every device and every deployment
Choose a standard IoT SIM (UICC) with a single profile for simple and reliable connectivity, or choose an IoT eSIM (eUICC) for maximum flexibility and future-proofing. With an eSIM, you can remotely change the network profile whenever your coverage, application, or deployment requires it.
Whatever choice you make, IoT Discount helps you with the right SIM configuration, connectivity, and technical support for your IoT or M2M project.
Still not sure about the correct SIM form factor?
Have you already selected your devices? Then the required SIM form factor is usually already known. If you are starting from scratch, we are happy to help you choose the right version for your hardware and application.
IoT Discount IoT SIM cards are available as mini-SIM (2FF), micro-SIM (3FF), nano-SIM (4FF), and eSIM (eUICC). Combine the right form factor with local, European, or global connectivity and ensure your device is correctly connected from the start.
Integrated SIM (MFF2)
Do you want to integrate connectivity directly into your production process? The MFF2 embedded SIM is soldered directly onto the printed circuit board and is ideal for compact, rugged, and hard-to-reach IoT devices.
This fixed SIM solution saves space, prevents loose contact points, and offers extra protection against vibrations, moisture, and tampering. Ideal for sensors, trackers, industrial equipment, and other devices that need to remain reliably connected for extended periods.
Multi-format SIM card (2FF, 3FF and 4FF)
Do you want easy access to your devices after installation and a practical, affordable SIM solution? Then the classic multi-format IoT SIM card is an excellent choice.
Simply choose the right size — mini-SIM (2FF), micro-SIM (3FF), or nano-SIM (4FF) — pop it out of the card, insert it into your device, and connect. A reliable and simple solution for a wide range of IoT and M2M applications.