The GPS wars are getting interesting. Huawei just dropped the Watch GT Runner 2, the first production smartwatch with true tri-frequency GNSS. Meanwhile, Garmin and COROS are still sitting on dual-band. So what is the holdup?
The Basics: What Tri-Band Actually Means
Before we get into the when and why, let us clear up the terminology.
Satellite navigation systems broadcast on multiple radio frequencies. Most watches today use dual-band (also called dual-frequency), which means they receive two signals at once. The first is L1, the legacy civilian signal that has been around for decades. The second is L5 or E5a, which was added specifically to correct for atmospheric distortion.
The problem is that atmospheric interference varies. Two frequencies help model and cancel out that interference, giving you 1-2 meter accuracy instead of 3-5 meters. That is why dual-band became the standard.
Tri-band adds a third frequency. The big one is the Galileo E6 signal, which carries the High Accuracy Service (HAS). This broadcasts free correction data directly from satellites, meaning you do not need a ground-based correction network. The result is real-time, centimeter-level positioning.
Quad-band goes even further, adding a fourth frequency for even better accuracy.
What Huawei Just Did
The Huawei Watch GT Runner 2 is the first production smartwatch to ship with tri-band GPS. It uses BeiDou frequencies (B1I + B1C + B2a) in China, with dual-band fallback in other regions.
This is a big deal because the technology has been technically possible for years but was too power-hungry for a wrist-worn device. Huawei managed to squeeze it into a watch that still gets 14 days of smartwatch battery and 32 hours of continuous GPS.
But there is a catch. DC Rainmaker tested it and found that while the GPS accuracy is excellent, the battery trade-off is real.
The Battery Numbers: Tri-Band vs Dual-Band
Here is where it gets interesting. In controlled testing:
- Garmin Forerunner 970 (dual-band, always-on): ~23.5 hours of GPS battery
- Huawei Watch GT Runner 2 (tri-band): ~16.7 hours of GPS battery
That is a roughly 30% reduction in battery life when you run tri-band continuously. For a marathon runner, that might not matter. For someone doing a 100-miler or multi-day adventure, it absolutely does.
Huawei claims 32 hours, but that is in dual-band mode. When you crank up tri-band, you lose roughly a third of your runtime.
Why Garmin and COROS Are Waiting
Garmin introduced SatIQ back in 2022, which intelligently switches between single-band and dual-band depending on conditions. It saves battery in open terrain where you do not need the extra accuracy, then ramps up when you go under tree cover or between buildings.
This approach works well. Most runners never notice GPS issues in normal conditions. The 1-2 meter accuracy of dual-band is plenty for Strava segments, turn-by-turn directions, and pace tracking.
COROS took a similar path with dual-band across their lineup. Their PACE 4 gets 31 hours of GPS battery, which is competitive with anything Garmin offers.
Both companies are likely asking: why switch to tri-band and tank battery life when dual-band is already "good enough" for 95% of users?
The Chip Problem
The bigger issue is the chip ecosystem. Most wearable GPS chips from companies like Sony and MediaTek are just now becoming power-efficient enough for tri-band in a watch. The market for high-accuracy commercial positioning chips is primarily being driven by self-driving vehicles, not fitness wearables.
When Garmin and COROS do switch, they will need chips that can deliver tri-band performance without destroying battery life. That breakthrough has not happened yet.
When Might We See It?
Based on industry trends and chip availability, here is a realistic timeline:
- 2026: More Huawei devices go tri-band. Maybe a Samsung or Google flagship.
- 2027-2028: Tri-band becomes standard in premium watches as chip costs fall and power efficiency improves.
- 2028+: Quad-band (adding Galileo E6 for free corrections) starts appearing in flagship devices.
Garmin will probably be last to adopt, not because they cannot, but because they prioritize battery life above all else. Their user base is endurance athletes who care about multi-day battery more than centimeter-level accuracy.
Is Dual-Band "Good Enough"?
For most runners, yes. If you run in parks, on roads, or on open trails, dual-band GPS gives you 1-2 meter accuracy. That is more than enough for tracking pace, distance, and Strava segments.
Tri-band matters most in specific scenarios:
- Dense urban environments with tall buildings
- Forested trails with heavy canopy
- Mountain canyons
- Technical trail running where every meter counts
If you are a road runner or do casual trail running, you probably will not notice the difference. The battery savings from dual-band might actually matter more to you.
The Bottom Line
Garmin and COROS are not ignoring tri-band. They are waiting for the technology to mature before forcing a battery trade-off on their users. When the chips get efficient enough, they will switch. But for now, dual-band with smart switching (like Garmin SatIQ) delivers 95% of the accuracy for 100% of the battery life.
Huawei is leading the charge, but at a cost. The GT Runner 2 is an excellent GPS watch with groundbreaking accuracy. Just know that if you run it in tri-band mode all the time, you are trading roughly 30% battery life for that precision.
For most runners, that trade-off is not worth it. But for the data nerds and technical trail runners who want every meter measured perfectly, tri-band is the future.