150+ Countries Now Demand Your Passport for a Local SIM in 2026 - And Some Switch It Off Days Later
The local prepaid SIM used to be the traveler's default move: land, find the kiosk, hand over cash, get a number. In 2026 that transaction looks very different. More than 150 countries now require a passport or national ID before a local SIM can be activated, and the rules tightened again through 2025 and 2026 as governments expanded mandatory registration laws.
The registration itself is not the whole story. The bigger surprise for travelers is what happens after registration - several countries now switch the line off on a timer.
The three countries that catch people out
Thailand. Buying a SIM means handing your passport across the counter. Staff scan the document, take a face photo at an in-store kiosk, ask for a Thai address, and print a one-page registration form for you to sign. Then comes the part nobody mentions at the counter: Thailand's 8-day auto-deactivation rule. Tourist SIMs that are not properly re-registered or topped up within that window stop working, which catches a large share of visitors at least once.
Vietnam. Expect registration at official carrier stores and airport kiosks, passport in hand. And Vietnamese SIMs deactivate at 30 days if your visa is shorter than the SIM plan you bought - so paying for a longer package does not buy you a longer line.
India. India runs the strictest process of the three. Every foreign tourist must complete full KYC to activate any SIM or eSIM from a domestic carrier, including biometric verification and a multi-hour activation window. You do not walk out connected; you walk out waiting. We covered the parallel tightening in Japan's ID rules for local SIM and eSIM activation earlier this year.
Why this is a connectivity problem, not a paperwork problem
Registration rules matter to a traveler for one blunt reason: they all happen after you arrive, in a language you may not read, at a counter with a queue, while you are already offline.
The failure mode is consistent. You land, airport Wi-Fi is captive-portal-gated and wants an SMS code you cannot receive. The carrier kiosk in arrivals has a line. The form wants a local address you do not have yet because the hotel confirmation is in an email you cannot open. An hour disappears, and a meaningful number of travelers give up and pay carrier roaming rates anyway.
There is also a real privacy dimension. Registration means your passport, your face, and often a local address are attached to a phone number in a database you have no visibility into. That is a separate conversation from provider-side verification, which we unpacked in our piece on eSIM eKYC and data privacy.
Where travel eSIMs sit in all this
Here is the distinction that matters, and it is frequently misunderstood: the registration requirement generally applies to SIMs and eSIMs sold by domestic carriers in that country. A travel eSIM bought from an international provider before departure typically does not require in-country KYC, because you are not becoming a subscriber of the local network - you are roaming onto it through your provider's agreements.
In India specifically, travel eSIMs from international providers sidestep the tourist KYC process that domestic carrier SIMs demand. The same broad logic applies in Thailand, Vietnam and Japan.
That does not make travel eSIMs universal. A handful of countries restrict or block them outright, which we mapped in where travel eSIMs are blocked. Check the destination before assuming.
A practical pre-departure checklist
- Look up the destination's registration rule before you book connectivity. If it is on the 150-plus list, assume the airport kiosk costs you an hour.
- Buy and install the travel eSIM at home, on Wi-Fi. This is the single step that removes the arrival scramble entirely.
- Match the plan to your trip length, not to the biggest data number. Travelers routinely overpay by buying more days than they need, or by buying a plan whose validity clock starts at purchase rather than at first connection.
- Keep your home number active for SMS codes. Banking and airline logins still send one-time codes to your number, and a data-only travel profile will not receive them.
- If you still want a local SIM, get it on day two, not day one. Buy it deliberately, with your hotel address in hand and a working data connection, rather than exhausted in the arrivals hall.
Providers such as HOLASIM are built around this pre-departure pattern, and the practical comparison points across the market are price per gigabyte, how validity days are counted, and whether the plan covers the specific countries on a multi-stop itinerary.
The registration desk is not going away. In 2026, the fastest way through it is to not need it.