Prepaid vs Postpaid in Afghanistan: Which Numbers Can Receive Top-Up?

Only prepaid Afghan mobile numbers can receive top-up. Postpaid (contract) lines can’t. A prepaid line works on credit added in advance, so a top-up from abroad simply adds to the balance. A postpaid line is billed afterwards, so there is no balance to add credit to. If you try to top up a postpaid number, the top-up fails and your payment is refunded to your card.

Most mobile users in Afghanistan are on prepaid, so this is rarely a problem. But it is worth checking before you send, especially if the phone belongs to a company or an organisation.

Key takeaways

• Prepaid = pay first, use later. Can receive top-up.
• Postpaid = use first, pay a bill later. Can’t receive top-up.
• The number format looks the same for both: +93 and 9 digits starting with 7.
• The quickest test is to ask: “Do you buy credit, or do you get a monthly bill?”
• A top-up to a postpaid line fails and is refunded to your card.

What is the difference between prepaid and postpaid?

Prepaid lines work on a balance. The user, or someone abroad, adds credit first, and the phone can make calls, send SMS and use the internet until that credit runs out. Credit can come from a scratch card bought in a shop, from a mobile wallet, or from an online top-up like WatanTopUp. When the balance is empty, paid services stop until more credit arrives.

Postpaid lines work on an account. The user makes calls and uses data during the month and pays a bill afterwards, usually under a contract with the operator. There is no prepaid balance to top up, because usage is charged to the bill.

Both kinds exist on Afghan networks, but for personal phones prepaid is the usual choice.

Why can’t a postpaid number receive top-up?

An online top-up sends credit to the operator, which adds it to the number’s prepaid balance. A postpaid line doesn’t have one. So when a top-up is sent to a postpaid number, the operator can’t apply it and the top-up fails. On WatanTopUp, a failed top-up is refunded to your card, as explained in our refund policy.

The same applies to landline numbers. Online top-up is only for prepaid mobile numbers.

Can I tell from the number whether it is prepaid?

No. Prepaid and postpaid numbers look identical. Both have +93 followed by 9 digits starting with 7, and both use the same network prefixes:

• Roshan: 079, 072
• AWCC: 070, 071
• Etisalat: 078, 073
• Atoma (formerly MTN): 077, 076
• Salaam (Afghan Telecom): 074, 075

The form detects the network automatically from the number, but the type of line isn’t visible from the digits. You can read more in our guide to Afghan number prefixes.

How can I find out whether my relative’s line is prepaid?

A few simple questions usually settle it:

1. “How do you add credit?” If they buy scratch cards, use a mobile wallet or receive top-ups, it is prepaid.
2. “Do you get a monthly bill for this phone?” If yes, it is likely postpaid.
3. “Who gave you this SIM?” A SIM provided by an employer, a company or an organisation is more likely to be on a contract. A SIM bought by the person themselves is usually prepaid.
4. “Has anyone sent you credit to this number before?” If a previous top-up worked, the line was prepaid at that time.

If they still aren’t sure, their operator’s customer service can tell them what type of line they have.

What if the number turns out to be postpaid?

You have a few options:

• Send to another number. Many people in Afghanistan use two SIM cards, often on different networks. If your relative has a second, prepaid SIM, send the top-up there.
• Top up someone in the same household whose number is prepaid, if the aim is to keep the family connected.
• Ask whether the line can change. Whether a postpaid line can be switched to prepaid is up to the operator, so your relative would need to ask them directly.

Don’t keep retrying the same postpaid number: each attempt will fail in the same way.

Two SIMs, two networks: which number should I top up?

Because many families have more than one SIM, it helps to ask which number they use for what. For example, one SIM might be used mainly for calls and another for internet. Top-up goes to the specific number you enter, and it doesn’t move between SIMs, so:

• send airtime to the number they use for calls,
• send data to the number they use for WhatsApp and the internet,
• and check that each one is prepaid.

Our article on airtime vs data bundles explains how to choose, and the data bundles page shows which bundles are available online today.

What happens step by step when I send to a prepaid number?

1. You enter the number on the top-up form. The network is detected automatically.
2. You choose airtime in Afghani (AFN) or a data bundle, and see the price in US dollars with the fee included.
3. You pay by card, Apple Pay or Google Pay on Stripe’s secure checkout.
4. The top-up is delivered automatically, usually within seconds.
5. The recipient gets an SMS from their operator, and you get an email receipt with an order reference.

If anything doesn’t go as expected, our troubleshooting guide walks through what to check.

In short

Top-up works for prepaid Afghan mobile numbers only. Postpaid and landline numbers can’t receive it, and a top-up sent to one fails and is refunded to your card. You can’t tell the type of line from the digits, so ask your relative how they normally add credit or whether they get a monthly bill. If their main number is postpaid, send to a second prepaid SIM or to someone else in the household.

Frequently asked questions