Permanent roaming restrictions are the reason a device that passed every test in the lab stops working ninety days after it ships. Several countries limit how long a foreign SIM stays attached to a domestic network. The enforcement patterns differ: some regulators cap the roaming period outright, some require a local subscriber identity for machine-to-machine traffic, and some leave it to individual operators to disconnect long-term roamers. What you use instead is a local subscriber identity in the affected market, delivered through multi-IMSI or through a remotely provisioned eSIM profile.
The rules move. Treat any country list, including the one below, as a starting point to verify with your provider before you ship hardware.
Roaming was designed for people who travel and come home. A phone attaches to a foreign network for two weeks and leaves. An IoT device attaches and stays for a decade.
Regulators and operators object to that for three reasons. Domestic operators lose the revenue and the customer relationship they would hold if the device used a local subscription. Lawful interception and emergency service obligations are harder to meet when the subscriber record sits in another jurisdiction. And data protection rules in a growing number of markets require traffic from domestic devices to terminate domestically rather than route back to a home core abroad.
None of those objections weakens as fleets grow. Expect the direction of travel to continue.
The failure rarely looks like a regulatory notice. It looks like a support ticket.
A batch of devices in one country drops off the network and will not reattach. Attach requests are rejected at the visited network. Devices that shipped recently keep working while older ones fail, because the clock started when each SIM first attached. In the worst pattern the operator disconnects at a fixed cutoff counted in days of continuous attachment, and every device that shipped in the same window fails together.
By that point the hardware is installed. The fix is a SIM change, and a SIM change on an installed base means a field visit unless you planned for it at the identity layer.
Regulators are not converging on one rulebook. Some ban permanent roaming by name. Others reach the same result through local licensing, SIM registration, or data residency rules. The table below lists the restrictions worth checking before you commit a device cohort to a market, each traced back to a regulator, an independent telecoms research firm, or reputable reporting.
| Region or country | Type of restriction | What it means for your deployment |
| European Union | Fair use monitoring under the roam-like-home rules | Operators can monitor a SIM's roaming pattern over a 4 month window. If a SIM spends more time abroad than at home and its roaming use exceeds domestic use, the operator may apply surcharges or restrict the line, even within the EU. |
| Turkey | Permanent roaming prohibited by law | International roaming is capped at 120 days under Turkey's Electronic Communication Law (5809). Foreign eSIM profiles can only be installed outside Turkish customs zones, and a BTK authorised operator has to provision any local profile. |
| Russia | Foreign SIM and eSIM roaming actively blocked | Mobile data on a foreign SIM or eSIM is suspended for the first 24 hours after entry, and the block resets every time the device changes network or region. Tighter registration rules for IoT and M2M SIMs are under active discussion. |
| Brazil | Permanent roaming banned outright | ANATEL does not accept a roaming SIM as a substitute for a locally authorised service. IoT and M2M connectivity needs its own authorisation, a stricter regime than most of the rest of the Americas. |
| Nigeria | Permanent roaming effectively prohibited | SIMs need local registration linked to a National Identification Number, and foreign providers need a registered legal entity in-country, one of the strictest approaches among African markets studied. |
| India | Permanent roaming prohibited, with a sanctioned route for foreign SIMs | A foreign operator needs a Department of Telecommunications No Objection Certificate, valid for 3 years, with KYC checks and monthly security reporting. TRAI is now consulting on a dedicated authorisation for IoT and M2M devices shipped with foreign SIMs. |
| China | Permanent roaming prohibited | Connectivity has to run through a China-registered operator. In practice, this rules out foreign eSIM or roaming-based IoT connectivity at scale. |
| Saudi Arabia and the wider Gulf | Licensing frameworks replacing roaming | Regulators are tightening identity verification for SIM activation and building licensing frameworks that treat closed M2M traffic differently from public roaming. Qatar has signalled a 90 day limit on inbound roaming without a bilateral agreement in place. |
These rules shift with little warning, and enforcement varies by carrier even within one country. Confirm the current position with your connectivity provider and the local regulator before you ship a device cohort into any of these markets.
Three approaches solve the problem, and they are not equivalent.
A local SIM per market removes the roaming question entirely and creates a contract, an invoice, and a support relationship per country. That works for two markets. It stops working at ten.
Multi-IMSI puts more than one subscriber identity on a single SIM, so a device presents a local identity in markets that restrict roaming and a roaming identity elsewhere. The switch happens without touching the device. The constraint is the set of identities loaded at manufacture.
eUICC with remote SIM provisioning goes further. The operator profile itself is downloaded over the air after deployment, under GSMA SGP.32 for IoT devices that have no user interface. A device installed in 2026 accepts a profile that did not exist when it shipped. That is the only approach that survives a regulatory change you did not forecast.
IXT supports local IMSI options in key markets to reduce permanent roaming risk, and profile management sits in the CMP alongside the rest of the fleet.
Ask your provider which markets in your deployment plan restrict permanent roaming today, and what the enforcement mechanism is in each. Ask whether the SIM you are buying holds more than one IMSI, and whether it is eUICC-capable. Ask what a profile change costs operationally once devices are installed. Ask who monitors regulatory change on your behalf, and how you find out.
A provider who answers those four questions precisely has thought about your eighth year. One who answers with a coverage map has thought about your first month.
Permanent roaming is a commercial and regulatory constraint wearing technical clothes. You solve it at the identity layer, before the hardware design is frozen, or you solve it with a van and a ladder.
Ask us how local IMSI and eUICC options apply to your target markets. Book a demo at ixt.io.