IoT roaming: how it works and where it gets tricky
Short answer
A professional IoT SIM roams automatically, attaching to the local operator with best signal. The problem is 'permanent roaming': countries that ban foreign SIMs from operating indefinitely (Brazil, Turkey, China, US, among others). The fix is multi-IMSI and eSIM with local profiles.
Permanent roaming: the silent risk
The law allows 'visitor' roaming. If your foreign SIM lives for months or years in another country, the local regulator can shut it off. Happens in Brazil, Turkey, China, and — for some operators — the US. Planning it upfront prevents mass blackouts.
Multi-IMSI and eSIM as the fix
Multi-IMSI: SIM carries several IMSIs and swaps to the local one when detecting the country. eSIM SGP.32: downloads a local profile remotely. Both solve permanent roaming and reduce per-MB cost in expensive markets.
IoT roaming cost
Inside Europe, 'like at home' IoT roaming is common. North America runs 1.5-3x Europe; Asia and LatAm variable. A multi-zone pool plan, negotiated with a multi-operator provider, is key.
- Europe: roaming usually included
- US: watch permanent roaming
- Brazil and Turkey: multi-IMSI recommended
- China: eSIM or local agreement
Permanent roaming map by country
Download our updated 2026 map: which countries restrict, which operators support multi-IMSI, and how to plan your global rollout.
Frequently asked questions
Do all IoT SIMs roam globally?+
No. Some are domestic (single country) and some global. For cross-border projects, explicitly contract global roaming and review country list and per-zone tariff.
What do I do in Brazil and Turkey?+
Multi-IMSI with an activatable local IMSI, or eSIM with a local profile. Serious IoT providers already have this in place.
Does roaming hurt quality or latency?+
Inside Europe, barely. Outside, it can add latency if traffic returns to the HPMN instead of using LBO (local breakout). Ask the provider whether they do LBO.
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