Do I need to do anything when crossing a border?
If the plan covers the next country the phone normally reattaches on its own, which can take a few minutes. If there is still no data after about ten minutes, toggle airplane mode once. If the plan does not cover that country, install the next plan while you still have a connection.
Sitting on a train or bus crossing from one country into another and suddenly having no data is a common worry for anyone doing a multi-country trip in one go, especially overland travel where there is no clear moment to pause and sort things out the way there is when a flight lands. The frequent question is whether anything special needs to be done when crossing a border, or whether the phone simply handles it on its own.
This page explains what happens to signal when crossing a border, what makes the phone reattach to a new network quickly or slowly, the difference between a plan covering several countries and one covering only a single country, and what to do if data has not come back some while after crossing. We will not state an exact number of minutes for reattachment, since it depends on how strong coverage is right at the crossing point and on the specific phone model.
What happens technically when crossing a border
As the vehicle moves across the border, the phone starts to see the new country's network signal appear alongside the old one fading out. During this transition the phone evaluates which network is stronger and appropriate from the list of partner networks the plan allows, then switches over automatically. How long that switch takes varies with how strong coverage is right at the crossing point, and some crossings sit in remote areas with weaker signal than a city centre.
If your plan covers both countries, this process usually happens on its own with nothing extra needed — the phone will show the new network name and data returns to normal. But if the plan only covers the first country, the phone will have no partner network to attach to in the second one, and there will be no data until a new plan covering that country is installed.
If the plan already covers the next country
This is the simplest scenario, because nothing needs installing. The only thing required is waiting for the phone to switch networks through its normal process, which can take a little while after actually crossing, especially if the crossing point sits in a rural area with less dense coverage than a city.
- 1Notice that the border has actually been crossedSome routes have clear signs or checkpoints, others do not. Check a map on the phone as well if unsure.
- 2Wait a moment for the phone to search for the new networkThe time varies with how strong coverage is right there — there is no fixed figure.
- 3If about ten minutes pass with still no data, toggle airplane mode onceToggling airplane mode forces the phone to search fresh, which helps if it was still clinging to the old, fading signal.
- 4If there is still no data after that, confirm the plan really covers this countryOpen the plan's details page again to confirm, in case it was assumed to cover the whole region when it actually only covers certain countries.
If the plan does not cover the next country
This case needs planning ahead of the crossing, because once across there will be no data at all until a new plan is installed, and installing a new plan usually needs internet in the first place to download the profile or open a QR link. If there is no connection at all by that point, installing becomes much harder.
- Install the next country's plan while data still works in the first country
- Turn the new line on and ready, but keep the default data line on the first country's plan until you no longer need it
- Once across and the first country's signal fades, switch the default data line over to the new one
- If the new line still has not attached, try toggling airplane mode as in the general case
The difference between regional and single-country plans when crossing borders
| Plan type | Behaviour when crossing a border | What to check before travelling |
|---|---|---|
| A regional plan covering every country on the route | The phone switches network on its own when crossing; nothing extra to install | Confirm every country on the route is genuinely on the coverage list |
| A regional plan covering only some countries | Coverage works for part of the trip, then drops once entering a country not on the list | Compare the plan page's country list against the actual route, country by country |
| A single-country plan | Works only within that country; signal ends the moment it crosses into another | Have the next country's plan ready before reaching the border |
A checklist table for before reaching the crossing point
| What to check | Why it matters |
|---|---|
| Whether the current plan covers the next country | Determines whether the phone can simply switch on its own or a new plan needs preparing ahead |
| How much data remains on the current plan | If it is close to running out right around the crossing, a backup plan may also be worth having ready |
| Which eSIM line is currently the default data line | When switching to the next country's plan, the default data line needs to change along with it |
| Downloading maps or important information offline in advance | A safeguard for the brief window where neither country's signal may reach at all |
Trips that cross more than one border in a single journey
Some routes, such as an overland trip crossing several countries back to back, mean coverage needs to be thought through in layers, not just for a single crossing point. What helps avoid confusion is writing down the full sequence of countries the route will pass through before travelling, then checking each one in order against the plan's coverage list, rather than only comparing the start and final destination — because a country in the middle can be missing from the list even when both the start and end countries are on it.
If a country in the middle turns out to be missing from coverage, the options are usually a separate plan just for that stretch, or a regional plan covering every country on the route from the start, if one genuinely exists for that route. Checking this ahead of time matters far more than trying to fix it mid-journey, since some points along the way may have neither a shop nor stable enough signal to install a new plan conveniently.
The difference between an overland crossing and a connecting flight within the same trip
A connecting flight between two countries in the same trip usually involves a stop at an airport, which often has Wi-Fi to use while waiting — unlike an overland border crossing, which usually has no such stop at all. This difference affects preparation, because with a connecting flight, airport Wi-Fi still exists as a fallback if the new plan is not fully installed before the next flight. An overland crossing has no such fallback, so everything should be ready before reaching the crossing point.
Another difference is that time in the air requires airplane mode under airline rules, which already gives the phone a natural full disconnection break. Turning airplane mode off after landing lets the phone search for a network from zero, as if just powered on. An overland border crossing has no such break — the phone has to switch networks while continuously running the whole time.
Why data sometimes briefly drops even when the plan covers both countries
Even when a plan covers both countries, data can still drop briefly while crossing, because many crossing points are not as densely covered as a city centre, and the phone needs some time to drop the fading old network and find a stronger new one. How long that takes varies by phone model and how strong coverage is right at that spot — it is not something that can be predicted precisely in advance.
How overland travel differs from flying
Crossing overland by train or bus differs from flying in that there is no forced airplane-mode window the way there is when a flight lands, so the phone has to manage the network switch while staying continuously active. This can sometimes mean it clings to the old, weakening signal longer than it should. Manually toggling airplane mode is therefore more useful in this situation, since it forces the phone to start searching afresh right away.
When to contact the team instead of continuing to wait
If a reasonable amount of time has passed since crossing, airplane mode has been toggled, and the plan is confirmed to genuinely cover this country, but there is still no data at all, send us the details rather than continuing to try indefinitely. Some cases relate to a connection issue with the partner network specifically at that spot, which needs checking from the system side.
- Your order number
- The country crossed from and the destination country
- Roughly where the crossing point was, if remembered
- The time of crossing and when the lack of data was first noticed
A short summary before closing this out
If the plan covers the next country, let the phone switch on its own, wait a little, and toggle airplane mode once if ten minutes pass. If the plan does not cover it, install the new plan while data still works in the first country, then switch the default data line once across. Always check the plan page's country list clearly before travelling, and if there is still no data after trying everything above, contact us with the necessary details.
DUK
Should airplane mode be turned on while actually crossing the border?+
No, it is not necessary. Let the phone operate normally during the actual crossing. Toggling airplane mode is recommended after crossing if there is still no data past about ten minutes, not pre-emptively during the crossing itself.
For a route crossing several countries in one day, how many plans need preparing?+
It depends on how many countries on that route the current plan actually covers. Compare the plan page's country list against the real route country by country; for any country not on the list, a separate plan for it needs preparing in advance.
Does the default data line need switching manually every time, or does the phone choose automatically?+
If only one eSIM line is active and it covers both countries, the phone usually switches networks on its own without needing a data-line change. But with two separate lines meant for two different countries, the default data line needs switching manually once crossing into the country the original line does not cover.
Is crossing a border at night different from during the day?+
The same principle applies day or night. Network usage density at a given time can vary by area, but we have no fixed figures on which time of day switches networks faster.
If the plan expires right in the middle of the route between two countries, what should be done?+
Always check the plan's expiry date against the travel schedule before setting off. If it will expire mid-route, prepare and install a new plan in advance the same way as when crossing into a country the current plan does not cover.
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