The Garmin Enduro 4 has officially leaked — and this time Garmin itself accidentally confirmed it.
An APK teardown of Garmin Connect version 5.26, first reported by Gadgets & Wearables, reveals a clear device reference to the Enduro 4 inside Garmin's own companion app. This is the first time Garmin has explicitly referenced a next-generation Enduro within its own software — a strong signal that an official launch isn't far off.
What the Leak Shows
The most concrete finding is simple: the string "Enduro_4" appears in Garmin Connect 5.26, but it did not exist in version 5.25. More importantly, it's not sitting in some forgotten corner of the code — it's embedded in a device registry-style table with an internal ID (5179) and category flags covering fitness, outdoor, golf, and wellness. That's the same structure Garmin uses for its multi-sport flagship watches.
The naming is worth noting too. There was some speculation about whether Garmin might skip to "Enduro" or "Enduro X" — as it did years ago when the Fenix line jumped a number. The app says otherwise. For now, it's Enduro 4.
Also spotted in the APK: expanded wording around Assistance Plus, Emergency Calling, Incident Detection, SOS, and Garmin Response — along with clearer references to LTE plans and data coverage. Whether any of that is Enduro-specific or a broader Garmin Connect refresh isn't clear from the code alone.
Call Handling Gets an Upgrade Too
The same APK reveals deeper phone-call infrastructure being added to Garmin Connect. The app now includes the Android permission MANAGE_ONGOING_CALLS and a new Garmin in-call service called GNCSInCallService. New strings cover incoming calls, call screening, answering, rejecting, and disconnecting — and the notification database gains a callType field for better call classification.
This points to Garmin improving how phone calls are handled on LTE-capable watches, though it's not exclusive to the Enduro 4.
When Will It Launch?
The Enduro release pattern is consistent:
- Enduro 2: August 2022
- Enduro 3: August 2024
- Enduro 4: Expected August 2026
August fits the rhythm Garmin has established with this series, and the fact that Enduro references are appearing in app code now — in mid-June — lines up with a typical lead time before a summer launch.
CEO Cliff Pemble has also mentioned a "very active year plan for outdoor" on Garmin's Q1 2026 earnings call, and the back half of 2026 is shaping up to be loaded for Garmin: CIRQA (a Whoop competitor), the Enduro 4, and likely the Fenix 9.
What Will It Bring?
No official specs yet, but the smart money is on these possibilities:
MIP display with solar charging — This is the Enduro's identity. The Fenix line has moved aggressively toward AMOLED (Fenix 8 Solar, Fenix 8 Pro), but the Enduro series has stayed true to transflective MIP for battery-first reasons. Garmin hasn't yet combined AMOLED with solar charging, and that likely won't change here. The Enduro will remain the choice for people who want to disappear into the backcountry for days without a charger.
LTE connectivity — This is the big question. Some speculation points to satellite-style messaging, voice features, or even inReach integration baked directly into the watch — eliminating the need for a separate communicator. The expanded safety wording in the APK (Emergency Calling, SOS, Garmin Response) feeds that theory. If Garmin adds inReach functionality to the Enduro 4, it would be a major differentiator for backcountry athletes.
New safety features — The expanded wording around Incident Detection, Assistance Plus, and Garmin Response suggests Garmin is making its safety ecosystem more prominent and clearer to users. The new language around LTE plans and coverage suggests Garmin wants users to understand exactly which features work with which connections.
Garmin Connect+ integration — New strings reference coach plans requiring Garmin Connect+ subscriptions, plan selection for cycling, fitness, triathlon and other coaching categories, and even discount codes for eligible subscribers. Expect more features to sit behind the paywall.
The Big Question: MIP or AMOLED?
The T3 article on the leak poses it directly: Can Garmin finally abandon MIP displays?
Garmin has been here before. The Fenix 8 Pro went AMOLED and Garmin watchers Split on whether it was the right call. The Enduro line has historically stayed MIP because solar charging + AMOLED still isn't a solved equation — the power requirements of a bright OLED screen eats into the solar advantage too aggressively for the Enduro's core use case.
If Garmin sticks with MIP, the Enduro 4 will likely claim another generational leap in battery life — potentially breaking the 100+ hour GPS tracking barrier that the Enduro 3 already flirted with. If Garmin goes AMOLED... well, that would signal a bigger philosophical shift for the series.
The Bottom Line
We don't have pricing, official specs, or a confirmed launch date yet — but the Enduro 4 just went from speculation to something Garmin itself is preparing for. The fact that the device string appeared in the wild on June 17th means app support is being readied, which typically means hardware is close behind.
Expect more leaks in the coming weeks. And if Garmin holds to form, August 2026 is the target.
We'll update this article as more information becomes available. Stay tuned to WatchesReviewed for full coverage.