When the wrong technology choice locks a device into a sunsetted network, connectivity failure is not a matter of if — it’s when.
Internet of Things (IoT) deployments live and die by their connectivity. A smart water meter installed today will likely still be in the ground in 2040. A logistics tracker shipped this year might cross borders for a few years. The cellular technology underneath those devices cannot be an afterthought; it has to be chosen with the full deployment lifecycle in mind.
At the IoT Summit during MWC 2026, Semtech delivered a practical session on exactly this challenge: how to select the right 5G IoT technology today, avoid costly migrations tomorrow and build solutions that stay relevant as networks evolve. The full session recording is now available to watch on demand — read on for a summary of the key takeaways.
No Enterprise Builds This Alone
5G has delivered reliable, stable connectivity at scale, but the technology is only part of the story. For enterprise IoT to work, the entire supply chain needs to align — chipsets, modules, communication devices, SIM cards, and network coverage all must be compliant with the same standards and available from ecosystem partners.
This is where the GSMA IoT community plays a critical role. By bringing together partners across the full hardware and network stack, the GSMA ensures that businesses can source what they need without being locked into a single vendor. The community also drives the factors that make or break commercial IoT success:
- Solution cost-effectiveness
- Optimized device size
- Power efficiency and long battery life
- Standards compliance across chipsets, modules and networks
A milestone worth noting is that the GSMA celebrated 1 billion low-power wide-area network (LPWAN) connections at this year’s IoT Summit. This number underlines just how mature and mission-critical this ecosystem has become.
Start With the Right Question
Technology selection does not start with a spec sheet. It starts with a simple question:
“How much data does your application actually need to transmit?”
The answer spans an enormous range, from tens of bits per second for a sensor sending a daily reading, all the way to Megabits or Gigabits per second for real-time video. Each point on that spectrum maps to a different technology family, with very different implications for cost, battery life, device size, and longevity.
Matching Technology to Use Case
Low Data Rate: Narrowband IoT (NB-IoT) and Long-Term Evolution for Machines (LTE-M)
For low-power, low-data-rate applications like smart metering, environmental monitoring and asset tracking, NB-IoT and LTE-M remain the clear choice. These LPWAN technologies were built specifically for IoT, introduced roughly a decade ago and are themselves 5G technologies under the 3rd Generation Partnership Project (3GPP) standard.
These technologies are expected to remain operational for the next 15 to 20 years. Dedicated spectrum may gradually reduce over the long term, but for applications like water meters or soil sensors that need years of battery life and infrequent data bursts, these are safe bets, as long as the service is available in your target deployment countries.
Mid-Range Bandwidth: Plan Your Migration Now
This is where the most time-sensitive decisions lie. LTE Cat-1 and Cat-1 bis (the single-antenna variant) have served mid-tier IoT applications well — from tracking, point of sale (POS) terminals and industrial monitoring — but 4G LTE is expected to sunset around 2030.
For any deployment with a lifecycle longer than five to seven years, building on Cat-1 or Cat-1 bis today is a strategic risk. The recommended path forward is Enhanced Reduced Capability (eRedCap), a 5G-native standard that sits below Reduced Capability (RedCap) in complexity and cost, purpose-built for mid-tier IoT. In the near term, Cat-1 bis remains a valid choice. For anything designed to run deep into the 2030s, eRedCap is the answer.
High Bandwidth: 5G RedCap and 5G
For applications demanding high throughput like video surveillance, autonomous systems and industrial robotics, 5G and 5G RedCap are the appropriate technologies. RedCap reduces the complexity and cost of a full 5G modem while still delivering the performance these use cases demand.
Why Half-Duplex Matters for Low-Power IoT
One of the more technical and often underappreciated considerations in IoT device design is duplex mode. The session made a clear case for why Half-Duplex Frequency Division Duplexing (HD-FDD) is typically the better choice for low-power applications.
In a Full-Duplex configuration, the device transmits and receives simultaneously on two different frequencies. This requires additional filters to separate the two radio streams, adding complexity, size and cost to the device design.
Half-Duplex quickly alternates between transmitting and receiving rather than doing both at once. For low data rate use cases, this trade-off is more than acceptable, and the benefits are significant:
- Simpler electronics, smaller form factor
- No complex duplexer filters required
- Single product references that can be deployed on all frequencies worldwide
- Lower power consumption
- Lower bill of materials cost
For the majority of IoT devices, battery life and compact design are paramount, making HD-FDD the right architecture.
Think Beyond the Device
Technology selection cannot happen in isolation. Two additional factors should always be in the scope:
Geographic deployment scale matters. A technology that works well for a regional rollout may not be the optimal choice for a global deployment, where roaming agreements, spectrum availability and network coverage vary significantly by market.
Lifecycle length drives everything. A three-year product can afford to ride on today’s LTE Cat-1 infrastructure, but a ten-year deployment cannot. The technology decision made at the design stage will define whether a device reaches end-of-life gracefully or gets stranded mid-lifecycle by a network sunset.
The Decision Framework
The guidance from the session can be distilled into a practical starting point:
- Low power, low data, long life: NB-IoT or LTE-M
- Mid-range, near-term deployment: Cat-1 or Cat-1 bis
- Mid-range, long-term or post-2030 deployment: eRedCap
- High throughput: 5G RedCap or 5G
Across all tiers, leverage the GSMA ecosystem, optimize the full device lifecycle and choose the simplest architecture that genuinely meets your application’s needs. Overbuilding connectivity is just as costly a mistake as underbuilding.
The 5G IoT era is well underway. The question is no longer whether to adopt 5G-based technologies, but which ones, and in what order.
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Source: “Future Proofing 5G IoT: Choosing the Right Technology” — IoT Summit, MWC 2026. Presented by Semtech on behalf of Sony Altair. GSMA IoT Community.
