Activation and expiry
When the validity clock starts, and what happens when it runs out.
Almost every activation question comes back to the same thing: when the validity clock starts. Get that wrong by a single day and the mistake follows you for the rest of the trip, from data cutting out the night before you fly home to an allowance you paid for and never touched. This page explains the mechanism sitting behind the ten questions below, so that the answers read as one picture rather than ten separate facts to memorise.
Hold one idea from the start: the validity period and the data allowance are two separate clocks. A plan ends when either one runs out, not when both do. Buying more data does not buy more days, and buying more days does not add gigabytes. Those two misreadings are the source of most of the complaints that reach us.
When the clock actually starts
Most plans sold to travellers begin counting at the first connection to a network at the destination — not at payment, and not at installation. But another group starts from the purchase date instead, and that is a condition each supplier sets rather than an industry rule. So we state the policy on every plan page, and we ask you to read that line before every purchase, even when you have bought something that looked identical before.
The difference has real planning consequences. If a plan counts from the purchase date, buying a fortnight early burns a fortnight of it. If it counts from first connection, you can buy well ahead and install at home without losing anything. So the first question to ask before buying is not the price per gigabyte — it is when this particular clock starts.
| Policy stated on the plan page | The clock starts when | What you should do differently |
|---|---|---|
| Starts at first network connection | The handset first registers on a network in a covered country | Buy and install early, but keep that profile's data roaming off until you land |
| Starts from the purchase date | The profile is issued once payment completes | Buy as close to departure as you sensibly can, leaving a day to install |
| Unclear, or you read it and are still unsure | Nothing should start yet — ask first | Message us on LINE or by email with the plan name and your travel dates |
The three validity-start policies you will see on plan pages
The three moments people confuse
Buying, installing and activating are three different events happening at three different times. Buying issues you a profile. Installing writes that profile onto the phone's eSIM chip. Activating is the profile attaching to a live network for the first time. Plenty of people assume installing equals activating and are therefore afraid to install before they leave — when installing early is exactly what we recommend, because installation needs an internet connection, and you have one at home but not yet in the arrivals hall.
The exception to watch is a handset that can reach a supported network on the way — during a layover in a country that happens to be on the plan's covered list, for instance. There, installing can become activating without you deciding to. The prevention is blunt: finish the installation, then leave that profile's data roaming switched off and do not set it as the line used for cellular data until you have arrived.
Installing before you fly without starting the clock
The sequence below is written for plans that start at first connection, which is the common shape. The aim is to finish everything that needs the internet while you are still at home, leaving one switch to flip on arrival. Menu names differ by manufacturer and by operating system version, so treat the wording here as a description of what to look for rather than text that must match letter for letter.
- 1Install the profile at homeOn your home Wi-Fi, scan the QR from the order page, or type in the SM-DP+ address and activation code by hand if you are reading the order page on the same phone you are installing to. This step always needs a connection.
- 2Give the profile a name you will recogniseLabel it with the country or the trip so you do not confuse it with your home SIM while switching in a hurry at the airport. A phone carrying several leftover profiles needs a clear label even more.
- 3Leave that profile's data roaming offThe profile can exist on the phone without being allowed to use data. This is the step that stops the clock starting during a layover in a country the plan happens to cover.
- 4Keep an offline copySave a screenshot of the installation details and the order number to the device, because the moment you most need them is the moment you have no connection.
- 5On arrival, flip one switchOnce you have landed, turn on data roaming for the travel profile and set it as the line used for cellular data, then give the phone a moment to find and register on a network.
- 6Confirm it works before you leave the airportLoad a page you have not opened yet on this trip. If it loads, you are done. If it does not, fix it while airport Wi-Fi is still within reach rather than from the back of a taxi.
Reading the remaining balance from the right place
Every handset keeps its own data counter, and that number almost never matches the plan's real balance. The reason is simple: the built-in counter measures from the last time the statistics were reset, which may have been months ago, and on many phones it adds up traffic from every active line, including the home SIM you left enabled to receive verification codes. The figure to make decisions with is the provider's own, shown on your order page.
There are two moments worth checking. The first is the night after a full day of use, to see whether your real consumption resembles your estimate. The second is midway through the trip, so that a decision about topping up happens while there is still room to act. Waiting until the data is gone is the worst possible time, because topping up usually needs the internet connection you have just run out of.
When the data runs out first, and when the date does
These two endings are different and deserve different responses. If the data runs out before the expiry date, the connection stops until you top up or buy again. Most travel plans do not bill overage automatically, which is genuinely a good thing: there is no invoice arriving afterwards. If the expiry date arrives first, whatever balance is left goes with it, because validity is tied to dates and not to the remaining gigabytes.
The practical consequence is that oversizing is not the safe default many people assume. Unused data does not roll into the next trip and does not come back as credit. It is usually better to estimate your real usage honestly and pick a plan that supports top-ups, so you can add more at the point where you actually know you need it.
| What you see | Most likely cause | What to do next |
|---|---|---|
| Installed, but no signal at all after arrival | Data roaming for that profile is still off, or it is not set as the line for cellular data | Turn both of those on, then toggle airplane mode for ten seconds |
| Bars showing but nothing loads | Registration has not finished, or the wrong line is carrying data | Confirm the travel profile is the data line, then wait a few minutes |
| Working fine, then it stops mid-trip | The allowance is gone, or expiry arrived early because the clock started at a layover | Open the order page over Wi-Fi and read the real balance and expiry date |
| The profile is still listed but does nothing | The plan has expired and what remains is a dead entry | Delete it whenever you like — it does not affect your home SIM — and buy fresh for the next trip |
Common symptoms around activation and expiry
Topping up, extending, or buying again
There are three genuine options, and which one is open to you depends on what that plan supports. Plans that allow top-ups usually extend validity along with the new bundle added to the same profile, so nothing new has to be installed. Plans that do not allow it leave one route: buy a fresh profile and install it again, which needs a short burst of internet. That is exactly where people get stuck, because the connection needed for the install is the one that just ended.
The workable habit is to decide while roughly a fifth of the allowance is left, not at zero. If you can see it will not stretch, top up or buy the next plan while the current one still carries the connection. That saves far more time and worry than hunting for café Wi-Fi at nine in the evening.
Trips with a gap, and why the clock cannot pause
Once the clock is running it runs to the end, whether the phone is off, the profile deleted, or the plan untouched for ten days. Validity counts its own calendar days, not days of use. So for a trip in two halves — a week away, a fortnight home, another week away — two shorter plans usually beat one long one that spends the middle stretch running down for nothing.
The catch is to check when the second plan starts counting. If it counts from purchase, buying both at the same time means the second one expires before you return to use it. Buy the second one closer to the second departure instead.
Activating in a country the plan does not cover
A travel profile carries a list of countries whose networks it is entitled to use. Land outside that list and the phone simply finds nothing usable — it does not connect and bill you extra, it does not connect at all until you reach a covered country. So the real-world problem is not a runaway bill; it is having planned on connectivity during a stretch where there is none.
The commonest miss is the transit country, especially an overnight layover or one where you leave the terminal. Check the covered list against every place the aircraft stops, not just the final destination. If a stop is not on the list, plan on airport Wi-Fi for that window, or prepare what you need offline beforehand.
The pre-departure checklist
This list is short on purpose, because a long one is a list nobody runs. Each item takes under a minute, and each of them heads off something we see repeatedly in the support inbox.
- Read the validity line on the plan page and know when this one starts counting
- Install the profile at home, while you still have Wi-Fi
- Leave the travel profile's data roaming off until you land
- Name the profile so it is distinguishable from your home SIM at a glance
- Screenshot the installation details and order number onto the device
- Check the covered-country list against every stop, not just the destination
- Put the expected expiry date in your calendar so data does not die on the day you fly home
When you are unsure, ask before you buy
Questions about start dates and expiry are far easier to answer before a purchase than after one, because once the clock is running the options only narrow. If you have read the plan page and are still not sure, message us with three things: the plan you are looking at, every country on the route including layovers, and your travel dates. That is enough for us to answer directly rather than trading messages back and forth.
There are two ways to reach us: LINE at https://lin.ee/skDPoNx and email at esimonline.asia@gmail.com. We do not run a support telephone line, and we are not staffed around the clock — the real hours are published on the contact page. Message us outside them and we will pick it up on the next round. Including your order number in the first message always saves one exchange.
FAQ
Is it a problem to install the profile weeks before I travel?+
Usually not, provided the plan starts at first connection and you keep that profile's data roaming off while you wait. Installing ahead is in fact what we recommend, because the installation itself needs an internet connection. If your plan instead counts from the purchase date, buying long in advance simply spends days for nothing — go back and read the validity line on the plan page before deciding.
Which time zone does the expiry date follow?+
How days are counted is set by that plan's supplier, and it is not standard across every plan, so we do not state a fixed cut-off on a supplier's behalf. The reliable move is to read the expiry shown on your own order page — and if your trip lands right on the final day, plan a day of slack rather than arranging for the data to end exactly as your return flight begins.
If I delete the profile from my phone, does the validity stop?+
No. Validity runs on the provider's side, not inside your handset, so deleting the profile saves you nothing and adds risk: most activation codes are single-use, and once deleted the profile may not go back on. If you want to tidy the profile list, delete only the ones belonging to trips that have genuinely finished.
Can I move an already-active plan to a new phone mid-trip?+
That is mostly the supplier's call, and it is generally difficult: the profile is written to the original handset's chip and the activation code is usually single-use. Do not delete it from the old phone hoping to reinstall elsewhere. Contact us with the order number before doing anything and we will check that plan's terms — but we cannot promise in advance that a transfer is possible.
Can I buy a plan several months in advance?+
You can buy ahead, but how far ahead depends on two things: which validity policy the plan uses, and whether it carries a window inside which the profile must be installed, which some suppliers set. The plan page has the detail. If it is not stated clearly, or you read it and remain unsure, ask us first and buy at the safer moment.
When does the validity period start?
Most plans start at first connection to a network at the destination, not at payment or installation — but some start from the purchase date. Every plan page states which policy applies; read that line before buying.
What if the profile activates before I arrive?
It happens when the phone attaches to a supported network during a layover. Prevent it by installing the profile but leaving its data roaming off until you land. If it has already started, the clock generally cannot be rewound.
How long after activation before data works?
Usually a few minutes, while the phone finds and registers on a network. If nothing after about fifteen minutes, toggle airplane mode for ten seconds before trying anything more involved.
What happens when the plan expires?
Data stops and any remaining balance goes with it. The profile stays on the phone as a dead entry you can delete whenever you like. Expiry does not affect your home SIM.
Does leftover data carry over to my next trip?
No. Validity is tied to dates, not to the balance, so unused data disappears at expiry. That is why oversizing is not automatically the safe option.
Can I extend the validity of a plan?
Plans that support top-ups usually extend when you add a new bundle to the same profile. Plans that do not require a fresh profile. The plan page says which applies.
Can I activate in a country the plan does not cover?
Generally no. The profile can only attach to networks in its covered-country list. Land somewhere outside that list and the phone simply finds nothing usable until you reach a covered country.
How do I check my remaining data?
The provider's own figure, shown on your order page, is the accurate one. The counter built into the phone measures from the last time you reset its statistics, so it rarely matches the plan's real balance.
What if data runs out before the expiry date?
The connection stops until you top up or buy again. Most travel plans do not bill overage automatically, which is a good thing: no surprise invoice afterwards.
Can I pause a plan?
No. Once the clock starts it runs to expiry whether or not the phone is on. For a trip with a long gap in the middle, two shorter plans can beat one long one.