If you have a Truma iNet Box in your vehicle, you have probably come across the topic recently: the networks the box relies on are being switched off. Here is what that means in practice, from when — and what you can do about it.
To set expectations: there is no need to rush, but it is worth knowing where you stand. Particularly because the obvious way out is not open to everyone.
Why 2G is vital for the box
The iNet Box has two modes: Bluetooth at close range, about ten metres, and SMS for everything else. Those messages travel over the 2G network — the box is a GSM modem with its own SIM card.
If 2G disappears, remote control disappears with it. The box is not broken: right next to the vehicle it still works over Bluetooth. But the very function you bought it for — starting the heating before you arrive — is gone.
The dates
What Truma has announced:
- 1 January 2023 — production of the iNet Box ended
- 1 January 2027 — no further app updates or maintenance releases
- 1 January 2028 — end of service and support
What the network operators have planned:
- Switzerland — 2G fully switched off since early 2023
- France — end of 2026
- Sweden — end of 2027
- Germany, Telekom — 30 June 2028
- Germany, Vodafone — September 2028
- Germany, O2 Telefónica — second half of 2028
So in Germany there is still time. The more interesting view is across the border.
Switzerland already shows what this looks like
This is the part that often gets lost in the discussion: the shutdown is not purely a future problem. Anyone travelling to Switzerland today already has no remote control — the network the box depends on no longer exists there.
For anyone heading to the Alps in winter, that is not a footnote but the normal case. And with France at the end of 2026, the next popular destination follows.
The way out — and who it excludes
Truma's successor system is called iNet X. It no longer uses SMS but a built-in eSIM in the iNet X Connect module. The problem lies elsewhere: in compatibility.
Two points matter:
First, the iNet X Panel replaces the CP Plus. It does not join it, it takes its place. That means removing your existing control panel.
Second, Truma's compatibility list sets hard limits. For the gas models Combi 4 and Combi 6 it names model year 2018 as the lower bound, in places with specific serial numbers from which the device is supported.
And that creates the real bind. CP Plus and iNet Box were sold from around 2014 onwards. If your Combi predates that cut-off, you are in an awkward position:
- Your existing iNet Box loses remote control by 2028
- Support ends in 2028 regardless
- Moving to iNet X is not provided for according to Truma's own list
Truma puts it cautiously in its current loyalty campaign: the switch is "not possible in every vehicle and not with every existing device configuration". Whether older units can still be upgraded through a workshop route is not known to us — that is best clarified directly with Truma or a service partner.
How to check where you stand
Three things are worth checking before buying anything:
- Model year and serial number of the heater. The type plate sits on the unit itself, usually under a bench seat or in a storage compartment. With that you can check Truma's compatibility list to see whether iNet X is an option at all.
- The sticker on the control panel. If it says "iNet ready", your CP Plus contains the electronics for bus communication — the prerequisite for any solution that talks to the heater over the bus.
- How you travel. Mostly in Germany? You have years. Regularly in Switzerland, or in France from 2027? Then this is already your present, not your future.
What is left if iNet X is not an option
For older heaters the frustrating part is this: there is nothing wrong with the heater. It runs, it heats, its control panel works. The only thing missing is the radio path to the outside world.
That is where an additional box comes in. CampMatic plugs into a free port on the Truma and takes over the connection — over WiFi or the 4G network, depending on the variant. The CP Plus stays in place and keeps working unchanged.
Important for anyone affected by the model year cut-off: a different prerequisite applies here. Supported are all compatible models (gas and diesel alike) with a CP Plus from firmware C4 onwards, in any vehicle — tested among others in the VW Grand California. A unit too old for iNet X may well work.
The 4G variant uses LTE and is unaffected by the 2G shutdown. If you have WiFi in the vehicle or use a portable hotspot, the WiFi variant is the cheaper route.
Whether it fits your vehicle is something we will tell you in advance — just send us the model and year.
Conclusion
The iNet Box had a good run, and Truma is open about the end dates. For vehicles from 2018 onwards iNet X is the intended path, and for many that will be the right solution.
What remains unresolved is the group with older Combi units: working heater, working control panel, but no intended successor. If that is you, there is no need to replace the heater — it is enough to replace the path to the outside world.
→ CampMatic Truma 4G — over LTE, unaffected by 2G — €189.00
→ CampMatic Truma WiFi — €149.00
Questions about compatibility? The help section walks through installation and setup step by step.
Further reading: