Is a 1 GB data bundle enough? Divide before you decide
A gigabyte figure on its own answers nothing — the same allowance is generous over a day and thin over a month. Here is the arithmetic that turns a size into a decision, and the four things that move you up or down a step.
Turn the gigabytes into a daily budget
One division does most of the work. A size only means something next to the window it has to last, and once you have the daily figure the choice usually makes itself.
| Work out | How |
|---|---|
| The allowance | Whatever the pack says, in gigabytes. Only the number matters here, not the name on it. |
| The window | How many days the operator gives it. A pack and its window are one product — the same allowance over a day and over a month are not the same purchase. |
| Your daily budget | Allowance divided by days. This is the figure to compare against how the phone actually behaves, and the one nobody works out. |
| What a day costs | Add up the video, first. The appetite chart on the parent page gives planning figures per hour for the things people actually do. |
The reason this matters is that people compare sizes against each other rather than against a day. A small pack that has to cover a month is a strict daily ration; the same size bought for a single day of travel is comfortable. Neither fact is visible in the number itself.
Two more things the division does not show, and both belong to the operator: unused data does not normally roll over when the window shuts, and some networks keep going at an out-of-bundle rate once the allowance is gone rather than simply stopping. Both are set out with the other comparison criteria on the mobile data page.
Four questions that move you a step up or down
Answer these about the phone in question, not about a busy week you can imagine. Each one is worth roughly a step on whatever ladder that operator publishes.
Is there video away from Wi-Fi?
This is the whole question, and everything else is rounding. Feeds with autoplay left on count as video whether or not anyone chose to watch. If the honest answer is none, a small pack is not a compromise — it is the right size.
Dropping streaming quality from high definition to standard roughly halves the appetite, and that switch usually lives in the app rather than the phone's settings.
How long does it have to last?
A window you did not read is the most common reason a size feels wrong. The same allowance is a different product over a day, a week and a month — and the shapes that put a clock or a traffic list around an allowance are set out on pack shapes.
How much of the day is on Wi-Fi?
A phone that sits on Wi-Fi at home and at work spends far less mobile data than its owner expects. The mobile allowance only has to cover the gaps — the commute, the errands, the evening out. Step down.
The reverse is the trap: a line that is the only connection there is carries everything, including the things a laptop does quietly in the background.
Is anything tethered to it?
A hotspot changes the size question completely, because a laptop or a tablet does not ration itself the way a phone app does — updates, cloud sync and video default to full quality. Step up, and by more than one notch if it is regular.
Whether tethering is even allowed on a given pack is the operator's rule, not ours.
So — is one gigabyte enough?
It is the size people ask about most, usually because it is the smallest step on the ladder. The honest answer depends entirely on the window it has to cover.
Open the catalogue- For a day — comfortable for almost anyone who is not streaming. Maps, messaging, email and a few calls will not trouble it.
- For a week — fine for a phone that mostly rides on Wi-Fi and uses mobile data in the gaps. Tight the moment video enters the picture.
- For a month — a messaging-and-maps ration, and only that. On the parent page's planning figures it is roughly a few hours of social feeds, or well under an hour of high-definition video, spread across the whole month.
- As a top-up mid-cycle — often exactly right. A small pack to reach the end of a window beats a large one that resets it.
Those come from the appetite figures on the mobile data page, which are planning numbers rather than promises — quality settings, codecs and background behaviour move them a long way.
What spends an allowance without being asked
When a size seems to vanish faster than it should, it is usually one of these rather than the size being wrong.
Video that starts on its own is still video. It is the single biggest silent consumer, and it is one setting inside each app.
Photo and file backup will happily run on mobile data unless told otherwise, and a weekend of pictures is not small.
Most phones default to Wi-Fi for these, but not all, and a single large update can take a visible bite out of a small pack.
A laptop treats the connection as unlimited unless the network is marked as metered. That is a setting on the laptop, not on the phone.
None of those is something we can see or change — what is left of an allowance lives with the operator. How the person holding the phone checks it is covered on pay as you go, and for a router or tablet with no screen to check, the data SIM page has the device side.
You bought the wrong size. Now what?
There are only two ways to be wrong, and they point in opposite directions. Neither is fixable after the fact — but both tell you exactly what to buy next time.
It ran out early
Work out which day it went and what changed that week — a trip, a tethered laptop, an evening of video. If nothing changed, the daily budget was simply short and the next step up is the answer.
In the meantime a second, smaller pack to reach the end of the window is usually cheaper than replacing the whole thing — though whether a second pack stacks, waits or replaces the first is the operator's rule.
It expired with most of it left
Money that never became data. Step down a size, or keep the size and look for a shorter window bought when it is actually needed — an unused allowance is not a saving.
If this keeps happening, the phone is probably on Wi-Fi more than assumed, and the mobile allowance only needs to cover the gaps.
A bundle credited to the number you specified has been delivered, so it cannot be swapped for a different size or refunded because it turned out to be the wrong one. The refund rule covers a load the operator refuses, not a change of mind — the full amount, service fee included, comes back automatically in that case. The formal version is the billing policy.
The ladder of sizes is the operator's
There is no universal set of sizes. Each network publishes its own steps for its own market, the smallest one differs from country to country, and a size that is standard in one place has no counterpart in the next. What loads at checkout is that operator's current list for the number you entered — we neither set it nor add to it.
So the useful preparation is the daily budget above, not a size you have decided on in advance. Arrive with a figure for what a day costs, and the right step on their ladder is obvious once you see it.
Why a size or a named pack you expected can be absent from that list is set out on buying a bundle online, and what the whole thing costs over the stretch it covers is on cheap data bundles.
Sizes, question by question
Payment, delivery and refund questions are answered in the help centre.
Open the help centreWhich sizes can I actually buy?
Whichever ones that operator publishes for that number. Enter it with its country code and their current list loads — there is no fixed ladder across networks, and the smallest step in one market is not the smallest in another.
Can I buy two sizes at once for the same number?
Not in one order — one order goes to one number and carries one pack. You can place a second order, but whether the two allowances stack, queue or replace each other is the operator's rule and differs by network.
Does a bigger size last longer?
Only if its window is longer, and that is a separate field. Size and validity are set together by the operator, so a larger allowance can come with the same window or even a shorter one. Read both.
What happens to what I do not use?
It normally goes when the window closes — unused data does not usually roll over, and that is the operator's rule rather than ours. It is the main argument against buying a size larger than the habit.
Can I check what is left before I choose a size?
Not from here. The current balance and what remains of a running pack live with the operator, so nobody outside them can read it. Whoever holds the phone can see it in seconds in the operator's own app or with the short code that network publishes.
Where to go next
This page is the size. The pages around it are the shape, the price and the screen you buy on.
Got the daily figure? Pick the step.
Enter the number and that operator's own sizes load, each with the window it comes with and the total on screen before anything is charged.