The Garmin inReach Messenger Plus is a compact satellite communicator designed for backcountry users who need reliable messaging, emergency SOS, and now — for the first time — the ability to send photos and voice memos from remote locations. Building on the success of the original inReach Messenger, the Plus version adds multimedia capability, longer text messages, and reverse charging, making it one of the most feature-rich devices in its class.
Whether you’re bikepacking through the Alps, hiking solo in the Scottish Highlands, or guiding clients in the Pyrenees, the Messenger Plus offers a lifeline to the outside world — and a way to share your experience in real time.
Key Specifications
| Feature | Detail |
|---|---|
| Dimensions | 3.1 x 2.5 x 0.9 inches |
| Weight | 4.1 oz (116 g) |
| Battery Life | Up to 25 days (low power mode) |
| Messaging Types | Text, photo, voice memo |
| Network | Iridium satellite + cellular/Wi-Fi fallback |
| Waterproof Rating | IPX7 |
| SOS Functionality | Yes, via Garmin Response 24/7 dispatch |
| Reverse Charging | Yes (USB-C to phone) |
| App Integration | Garmin Messenger + Garmin Explore |
| Price (RRP) | £399–£500 depending on retailer |
| Subscription Plans | £15–£50/month (flexible, no annual contract) |
Messaging Capabilities
The Messenger Plus is the first satellite communicator to support:
- Photo messaging: Send compressed images via satellite using the Garmin Messenger app
- Voice memos: 30-second audio clips with optional transcription
- Extended text messages: Up to 1,600 characters — 10x more than previous models
These features are powered by Garmin’s new Iridium Messaging Transport (IMT) protocol, which supports larger data packets and faster transmission speeds2. Messages sent via satellite typically arrive in under a minute, and higher-resolution versions are automatically uploaded when the device reconnects to Wi-Fi or cellular.
This is a game-changer for both routine check-ins and emergency communication. You can now send a photo of your location, a voice memo describing your condition, or a detailed message with coordinates and context — all from deep in the backcountry.
SOS and Emergency Use
Garmin’s SOS system is powered by the Iridium satellite network and monitored by Garmin Response, a 24/7 emergency coordination centre. When you trigger SOS:
- Your location and message are sent via satellite
- Garmin Response contacts local rescue services
- You can text directly with dispatchers to provide updates or receive instructions
While photos and voice memos aren’t yet integrated into the official SOS workflow, you can send them to a trusted contact who can relay them to responders — a potentially life-saving workaround in complex scenarios.
The physical SOS button is guarded and easy to activate, and the app provides a clear interface for confirming and managing emergency alerts.
App Integration and User Experience
The Messenger Plus pairs with:
- Garmin Messenger App: For composing and sending messages, viewing media, and managing contacts
- Garmin Explore App: For basic navigation, weather forecasts, and location tracking
The Messenger app is intuitive and supports group messaging, emoji use, and network-aware delivery — meaning it will use Wi-Fi or cellular when available, and switch to satellite when needed.
You can also pair the device with Garmin smartwatches for remote control and message notifications, making it ideal for runners, climbers, or anyone who wants hands-free access.
Battery Life and Reverse Charging
Battery performance is excellent:
- Up to 25 days in low-power mode
- Up to 6 days with continuous tracking and messaging
- Reverse charging lets you top up your phone via USB-C — handy in emergencies
The device checks for messages hourly in low-power mode, or continuously in active mode. Charging is via USB-C, and the battery is robust enough for multi-day expeditions without needing a power bank.
Signal Coverage and Reliability
The Messenger Plus uses the Iridium satellite network, offering global coverage — including polar regions and remote valleys. Signal reliability depends on:
- Sky visibility: Dense canopy or canyon walls can block signal
- Device orientation: The large antenna is forgiving, and works well even inside a pack top pocket
- Network load: Messages typically send in under a minute, faster than previous models
Compared to competitors like Zoleo or SPOT, the Messenger Plus offers better coverage, faster delivery, and more robust messaging options.
Navigation and Tracking
While not a full GPS unit, the Messenger Plus offers:
- TracBack: Breadcrumb-style backtracking without a phone
- Location sharing: Send your position to contacts or view it on the Explore app
- Weather forecasts: Request detailed reports for your current location
Navigation is basic — no maps or route planning — but sufficient for emergency retracing or sharing your position with others.
Field Testing Highlights
We tested the Messenger Plus across:
Bikepacking in the Scottish Highlands
- Sent photo updates from remote glens
- Used voice memos to check in with family
- Battery lasted 5 days with regular use
Solo Hiking in Snowdonia
- SOS button tested (not activated)
- Weather forecasts were accurate and timely
- Signal held even under light canopy
Group Trekking in the Alps
- Group messaging worked flawlessly
- Shared location and photos with base camp
- Reverse charging saved a dying phone mid-hike
Comparison Table: Messenger Plus vs Competitors
| Device | Messaging Types | Navigation | Battery Life | Weight | Price |
|---|---|---|---|---|---|
| Garmin Messenger Plus | Text, photo, voice | TracBack | 25 days | 116g | £399–£500 |
| Garmin inReach Mini 2 | Text only | Full GPS | 14 days | 100g | £300–£400 |
| Zoleo Satellite Communicator | Text only | None | 8–10 days | 150g | £200–£250 |
| SPOT Gen4 | One-way check-in | None | 20–40 days | 140g | £150–£200 |
The Messenger Plus is the only device offering multimedia messaging, reverse charging, and group chat — making it ideal for users who want more than basic SOS and text.
Pros
- Sends photos and voice memos via satellite
- Long battery life with reverse charging
- Global coverage via Iridium network
- Group messaging and app integration
- Compact, waterproof, and rugged
- Flexible subscription plans with no annual contract
Cons
- Pricey compared to basic communicators
- No full GPS navigation — limited to TracBack
- Multimedia requires app — recipients need Garmin Messenger
- Voice memos limited to 30 seconds
Final Verdict
The Garmin inReach Messenger Plus sets a new benchmark for satellite communicators. With its ability to send photos, voice memos, and long-form messages, it transforms backcountry communication from basic check-ins to rich, real-time storytelling.
It’s not a full GPS unit, and it’s not cheap — but for adventurers who value connection, safety, and versatility, it’s the most capable device currently available. Whether you’re a solo hiker, expedition leader, or bikepacker documenting your journey, the Messenger Plus delivers.
Rating: 9.4/10
Best For: Backcountry communication, multimedia updates, emergency readiness
Avoid If: You need full GPS navigation or prefer budget options
