If you are sourcing GPS trackers in 2026, the question “which LTE category should the device use” is no longer optional. The choice between LTE Cat-1, NB-IoT, and LTE-M (Cat-M1) determines battery life, monthly data cost, global compatibility, and whether the device can do voice — and the wrong choice locks you into a non-fixable problem after the first 1,000 units have shipped.
This article lays out the three profiles side by side, explains where each one actually wins, and gives a decision tree distributors can use when scoping a tracker order. We picked one of them for the A9 platform and will explain why at the end — but the framework holds for whatever supplier you are evaluating.
The three LPWA cellular profiles, in one paragraph each
LTE Cat-1 is a low-tier 4G LTE profile (10 Mbps down / 5 Mbps up) on standard LTE bands. Devices behave like phones — they negotiate VoLTE, hand over between cells, and work everywhere a regular smartphone works. Modems are around USD 4–8 in volume.
NB-IoT (Cat-NB1, Cat-NB2) is a narrowband profile carved out of the LTE spectrum (200 kHz channels, ~250 kbps max). Optimised for stationary devices reporting small payloads (utility meters, sensors). Modems are USD 2–4 in volume, but coverage and roaming are uneven.
LTE-M (Cat-M1) sits between the two — wider than NB-IoT (1.4 MHz channels, ~1 Mbps), supports voice, and supports cell handover for moving devices. Modems are USD 3–5. Strong coverage in North America, patchy elsewhere.
All three are 4G technologies and survive the 2G/3G sunset that is already killing legacy trackers. The differences below decide which is right for your use case.
Quick comparison
| Dimension | LTE Cat-1 | LTE-M (Cat-M1) | NB-IoT |
|---|---|---|---|
| Peak throughput | 10 Mbps down / 5 up | 1 Mbps down / 1 up | 250 kbps down / 250 up |
| Voice (VoLTE) | Yes | Yes | No |
| Mobility (cell handover for moving devices) | Yes | Yes | No (devices may drop when moving) |
| Modem power draw (active TX) | ~500 mW | ~250 mW | ~150 mW |
| Battery life on typical tracker (5-min reporting) | 5–7 days | 14–30 days | 30–90 days (stationary) |
| Global coverage (2026) | Excellent — anywhere LTE exists | Strong NA, moderate EU/APAC | Strong EU, fragmented elsewhere |
| Roaming | Standard LTE roaming, easy | Possible but operator-dependent | Often blocked at roaming partners |
| Module cost (10K volume) | USD 4–8 | USD 3–5 | USD 2–4 |
| Best for | Wearables, asset tracking, anything that moves or needs voice | Hybrid use cases needing voice + low power | Fixed sensors, meters, stationary trackers |
The single most important row is mobility. NB-IoT was not designed for devices that move — it lacks the cell-handover mechanisms that LTE Cat-1 and LTE-M have. A tracker on a person, a car, or a piece of luggage will drop sessions repeatedly on NB-IoT, and most carriers will not even sell SIMs into device categories where they know that will happen.
When LTE Cat-1 wins
Cat-1 is the right answer when any of the following is true:
- The device moves (a child, a senior, an asset on a truck, a piece of luggage)
- The device needs two-way voice (elderly care SOS, child safety, judicial check-in)
- You need to ship the same SKU into multiple regions without per-region SIM logistics
- You are running carrier acceptance with operators that have not yet certified NB-IoT or Cat-M for tracker categories (this is most US Tier-1s as of 2026)
Cat-1 modems also benefit from the largest installed base of any LTE profile, which means the longest hardware support tail and the lowest risk of orphaned firmware when a chipset goes end-of-life. For a tracker that needs to ship for 3–5 years, that matters.
The trade-off is battery: at a 5-minute reporting cadence with occasional voice events, expect 5–7 days standby on a 760–1000 mAh cell. If you need 30+ days standby on a single charge, Cat-1 is the wrong choice and you should look at LTE-M or NB-IoT.
When LTE-M wins
LTE-M is the right answer when all of these are true:
- You need voice (rules out NB-IoT)
- You can accept patchy coverage outside North America
- You need battery life in the 2–4 week range
- Your target carriers explicitly support LTE-M (Verizon, AT&T, T-Mobile in the US do; many EU/APAC carriers do but only on specific bands)
LTE-M is the closest to a “drop-in replacement for Cat-1 with better battery” — but the global coverage gap is real. We have seen distributors order LTE-M devices for a EU rollout, ship the first 500 units, and discover that the carrier in Spain or Portugal does not have LTE-M in the bands the device uses. The device works fine on the Berlin lab bench and bricks at the field site.
Always confirm LTE-M support for specific bands in specific carriers in specific cities before scaling to LTE-M.
When NB-IoT wins
NB-IoT is the right answer when all of these are true:
- The device is stationary (meters, sensors, asset tags that do not move)
- You do not need voice
- Payload is small (location every 1+ hours, status flags, sensor readings — not video, not voice notes)
- You can ship per-region SKUs with region-specific SIMs (roaming is unreliable)
- Battery life of months matters more than anything else
For a GPS tracking watch on a person — almost never the right answer. NB-IoT shines for water meters, parking sensors, and shipping container tags. Devices that sit still.
The single biggest mistake we see procurement teams make is ordering NB-IoT trackers for wearable use cases because the spec sheet promises “90 days battery life.” The 90 days assumes the device is not moving and is reporting once an hour. Put it on a child walking to school and the actual battery life collapses, plus the device will lose carrier sessions repeatedly.
A decision tree for tracker procurement
Walk through these questions in order. Stop at the first No that maps to a profile.
- Does the device need to move?
- No → keep going
- Yes → rule out NB-IoT
- Does the device need voice (two-way calling, voice notes, SOS audio)?
- No → keep going
- Yes → rule out NB-IoT
- Do you need single-SKU global shipping (same hardware to EU, US, LATAM, APAC)?
- No → keep going
- Yes → strongly prefer Cat-1 (LTE-M global coverage gaps will bite you)
- Is battery life of 14+ days on a single charge critical to the use case?
- No → Cat-1 is your answer
- Yes → LTE-M if voice is needed, NB-IoT if stationary, Cat-1 with a power-bank dock if you can ship the dock
- Do your target carriers (in writing, not in their marketing) certify LTE-M on the bands you need?
- No → fall back to Cat-1
- Yes → LTE-M is viable
For most wearable trackers (elderly care, child safety, judicial monitoring), the answer at step 1 is “yes, it moves” and the answer at step 2 is “yes, voice is required.” That collapses the tree to Cat-1 vs LTE-M, and step 3 usually kills LTE-M because the partner wants one SKU for global rollout.
What to ask suppliers before you order
Whichever profile you pick, get answers to these in writing before signing a PO:
- Modem chipset name (Quectel BG95-M3, BG770, Sierra HL7800, etc.) — chipsets get end-of-lifed, so you want to know when the lifecycle clock starts
- Certified bands for your target carriers — “supports LTE worldwide” is not an answer; you need the band list
- Carrier acceptance status — has the device passed certification with the specific MNOs you will ship to? Get the certificate or letter
- VoLTE registration handling — for Cat-1 and LTE-M, confirm the device registers VoLTE and falls back gracefully when the cell does not offer it
- Roaming policy — even on Cat-1, some MVNOs block roaming for tracker categories; confirm your SIM provider supports the regions you will operate in
- Power profile measurements — ask for actual mA draw at TX peak, idle, deep sleep — not just standby hours
- 2G/3G fallback behaviour — should the device fall back when 4G is unavailable, or refuse and retry? Different markets need different defaults
A supplier that cannot answer these in 24 hours is a supplier who has not built the radio testing infrastructure to ship reliable trackers at scale.
A9’s position
The A9 4G GPS Tracking Watch standardises on LTE Cat-1. The decision tree pointed there for our use cases: the device moves (worn on people), needs two-way voice (SOS, caregiver calls), needs single-SKU global shipping (50+ partner countries), and the 5–7-day standby with the included 1200 mAh power-bank dock gives partners a 2-week effective field battery that covers the practical edge cases.
We support per-region firmware variants for band tuning and 2G/3G fallback policy, and we run carrier acceptance for partners ordering 1,000+ units. If you are scoping a tracker order and want a no-BS technical conversation about whether Cat-1, LTE-M, or NB-IoT is right for your specific market and use case, reach out — we would rather scope realistically than oversell.