Cheap data bundles: the cheapest pack is rarely the cheapest month
The smallest figure on the list wins the comparison and loses the month. This page is the arithmetic that decides which bundle is actually cheap for the way the phone gets used — and the four checks worth making before you load one.
Three different things people mean by cheap
They point at different packs, and only one of them is the question you are really asking. Pick which before you start comparing.
Whichever you pick, the figure you are ranking has two parts: the operator's own price for that pack, in their currency, and a service fee that depends on the country, the operator and the amount. Both are on screen before you confirm, and neither has a discount code attached to it.
Cheapest to buy
The smallest figure in the list. Right when the phone needs to be online today and nothing more — a handset you are testing, a line you are keeping warm.
It misleads whenever the small ticket buys a short window. You are not buying the pack once; you are buying it as often as it runs out.
Cheapest per gigabyte
Price divided by allowance — the only way to rank a small pack against a large one, and the figure the bigger packs usually win.
It misleads when you do not finish the allowance. A gigabyte that expires unused was not cheap; it was unbought. Sizing a bundle is where that judgement is made.
Cheapest month of cover
What keeping the line online actually costs over the stretch you care about, once repeat purchases are counted.
This is the one almost nobody works out, and the one that decides whether a pack was a bargain. The arithmetic is short — it is the next section.
Once you know which cheapness you are after, the side-by-side mechanics — price per gigabyte, the validity window, what the network does at zero and what else is bundled in — are set out on the mobile data page.
Price the stretch, not the pack
Two bundles with the same figure and different validity are two different products. Four lines of arithmetic separate them, and none of it needs a calculator.
| Work out | How |
|---|---|
| How long it lasts | The operator's validity window for that pack — which is not the same thing as a calendar month, and is theirs to set. |
| How often you would rebuy it | The stretch you want covered, divided by that window, rounded up. A weekly pack covering a month is four purchases, not one. |
| The cost of the stretch | The pack's own price multiplied by that number. This is the figure to rank two packs on, and it is almost never the one on the list. |
| The fee, once per purchase | Our service fee is charged per order, so a pack bought four times carries it four times. The fee arithmetic is set out on recharge prices and offers. |
A weekly pack is not a quarter of the price of a monthly one unless it is literally a quarter of the price — and it will carry the service fee four times on the way. That is the usual reason a bundle that looked like the bargain of the list turns out to have been the expensive way to cover the same weeks.
The other direction has its own trap: buying a long pack for a line that barely gets used means paying for a window you will not fill. The parent page's point about unfinished allowances and this one about repeat purchases are the two ends of the same decision.
One larger bundle, or several small ones?
The same total spend, two different shapes. Which is cheaper depends on how predictable the month is, not on the packs.
| Shape | What it gives you | What you risk | Fits |
|---|---|---|---|
| One larger bundle | A longer runway and, usually, a better price per gigabyte. One order, so one service fee. | Allowance you do not finish before the window shuts, and money committed up front. | A month whose usage you can predict — a commute, a household routine, a phone that does the same thing every week. |
| Several smaller ones | You buy only what you turn out to need, and you can change size as the month goes. | A worse rate per gigabyte, a fee on every order, and the chance of running dry at the wrong moment. | An unpredictable month, a line you are still learning, or a handset someone else uses. |
The fee side of that trade-off — why three small orders cost three fees and one covering order costs one — is worked through on recharge prices and offers. What happens to a line as its balance runs down, and how to read what is left, is on pay as you go.
When a cheap bundle really is cheap
Four things have to be true at once. Miss one and the low figure on the list stops meaning anything.
Check a number's packs- Its validity covers the gap until you would realistically buy again — not the gap you hope for.
- You will finish the allowance, or close to it, inside that window.
- You know what the network does when it runs out: stop, or keep going at an out-of-bundle rate that costs far more per gigabyte than the pack did.
- Nothing inside it is something you are paying for and will not use — minutes on a data-only device, an app exemption for an app nobody opens.
None of the four is printed on the price. Validity, allowance and what is bundled are the operator's own terms for that pack; where the listing does not spell them out, the operator's app or site is the authority, not us. The fourth is your own usage, and only you have that.
Cheap in one market says nothing about another
A data pack is priced by the operator that owns the number, for the market that number belongs to, in that market's currency. There is no cross-border bargain to hunt: the catalogue you see is the one for the number you entered, and a pack that looks generous in one country has no counterpart price in the next.
Your card is charged in its own currency. We add no spread on top of the exchange rate; your bank applies its own conversion, which is the one variable on a foreign bundle that is genuinely yours to shop around.
Buying data for a line you carry abroad is a different question again — roaming against a local SIM weighs it, and sending airtime abroad covers a number that is not yours.
Cheap data, question by question
Refunds, receipts and payment questions are answered in the help centre.
Open the help centreDoes a bigger bundle always work out cheaper per gigabyte?
Usually, but not always, and the operator decides — some networks price a middle pack keenly and the largest one less so. Divide and check rather than assume. And a better rate per gigabyte only counts if you reach the end of the allowance before the window does.
Can I see what a bundle costs before I pay?
Yes. Enter the number, and the packs you choose from are that operator's own, priced in their currency. The service fee is a separate line and the total is on screen before you confirm — there is nothing added afterwards.
Is buying the same small pack more often ever cheaper?
Rarely on the arithmetic, sometimes on the risk. Small packs usually cost more per gigabyte and each order carries its own fee, so repeating one is the expensive shape. It wins only when you genuinely cannot predict the month and would otherwise buy an allowance that expires unused.
What if I buy the wrong size?
A bundle credited to the number you specified cannot be refunded or swapped — it was delivered, and the operator applied it. That is why the size is worth a minute before the order rather than after. If the operator refuses the load instead, the full amount comes back to your card with the service fee included, automatically.
Do you run cheap-data offers, coupons or a price match?
No to all three. There are no campaigns, no codes and no negotiated rate for buying more often or in bigger sizes, and no field at checkout to type a code into. The operator may run a promotion of their own on a pack in their catalogue — that reaches the order because it is attached to the value you bought, not because we applied anything. Where a data promotion can come from at all, and why prepaid prices keep climbing, is set out on recharge prices and offers.
Where to go next
This page is the money arithmetic. The pages around it are the size, the price generally, and the line the data sits on.
For the value case across a whole plan rather than a single pack, where the real savings sit argues that the plan matters more than the discount, and the billing policy is the formal version of the refund rules quoted above.
Know the stretch? Then you know the pack.
Enter the number and the operator's own catalogue opens, with the fee and the total on screen before anything is charged.