What is Mobile Billing?
Also known as: Direct carrier billing, DCB, Mobile payments
What is mobile billing?
Mobile billing is a payment method that charges a digital purchase to a user's mobile phone bill or prepaid balance instead of a credit card. The carrier collects the money. The merchant gets a revenue share after the carrier takes its cut.
The technical name is direct carrier billing, or DCB. Industry shorthand: mobile payments, carrier billing, operator billing. All refer to the same flow.
DCB exists because cards do not. In markets like Indonesia, Nigeria, India, and Egypt, card penetration sits well below the global average. Per the World Bank Global Findex 2021, only 1 in 5 adults in low-income countries owns a credit card. Almost everyone owns a phone with a SIM. Carriers own the relationship. Mobile billing turns that relationship into a payment rail.
How direct carrier billing works
DCB compresses checkout into two or three steps. The exact flow depends on the carrier integration and the regulatory regime.
PIN flow
- The user clicks a "subscribe" or "buy" button on a landing page.
- The merchant detects the user's mobile country code, usually through a header injected by the carrier (the MSISDN forwarder).
- The user enters their phone number on a payment screen.
- The carrier sends a 4 to 6 digit one-time PIN by SMS.
- The user types the PIN to confirm. The charge posts to the next bill.
This is the standard flow for subscription content, mobile games, and dating apps in EU and APAC markets.
Click-to-buy
On networks where the carrier injects the user's identity at the network layer, no PIN is needed. The user taps once. The charge posts. Click-to-buy is the dominant flow for app store top-ups handled by Bango and Boku, the two largest DCB aggregators globally.
Click-to-buy converts at 3 to 5 times the rate of PIN flows. It also draws the most regulator scrutiny, since users can be charged before they understand what they bought.
OTP verification
For higher-value purchases, carriers add a second factor. An OTP (one-time password) sits on top of the PIN flow. The merchant sends a confirmation SMS with the price and product. The user replies "YES" to confirm. Common in Italy, Spain, and the Gulf region where regulators mandate explicit double opt-in.
Where mobile billing thrives
DCB dominates in three commercial categories and a specific set of geographies.
[ORIGINAL DATA] Across affiliate network traffic measured between 2022 and 2025, three verticals account for 78 percent of all mobile-billing volume.
- Subscription content. Video-on-demand portals, ringtone and wallpaper bundles, mobile horoscope apps, sports highlight packages. Daily or weekly recurring billing at $0.50 to $5 per cycle.
- Gaming credits. In-game currency top-ups, gacha pulls, season passes. Single-charge transactions at $1 to $50.
- Telecom-adjacent services. VPN subscriptions, antivirus, cloud storage. Monthly billing at $3 to $15.
The geographies cluster predictably. Indonesia, Thailand, Malaysia, the Philippines. India, Pakistan, Bangladesh. Egypt, Saudi Arabia, the UAE, Turkey. Nigeria, Kenya, South Africa. Brazil and Mexico round out Latin America. Card penetration in these markets sits below 30 percent. Prepaid SIM penetration runs above 80 percent.
The math is simple. If 80 percent of users cannot pay with a card but 95 percent have airtime balance, DCB is the only checkout that scales.
Mobile billing vs card billing vs in-app purchase
Each rail solves a different checkout problem. The merchant economics differ sharply.
| Rail | Checkout friction | Carrier / store fee | Chargeback rate | Best fit |
|---|---|---|---|---|
| Mobile billing (DCB) | 1 to 3 steps, no card needed | 10 to 50 percent | Low (carrier-mediated) | Emerging markets, micro-transactions |
| Card billing | Card number, expiry, CVV, sometimes 3DS | 1.5 to 3 percent + interchange | 0.9 percent global average (Visa, 2023) | Mature markets, higher AOV |
| In-app purchase (Apple, Google) | Stored credential, biometric confirm | 15 to 30 percent | Near zero | Mobile games, app subscriptions |
| Mobile money (M-Pesa, GCash) | USSD or app, PIN | 1 to 3 percent | Low | Sub-Saharan Africa, SE Asia |
The trade-off: DCB has the lowest friction in card-poor markets but the highest take rate. App store rails are friction-free but charge 30 percent. Cards are cheap but useless if the user does not have one.
Compliance: GSMA Code of Conduct and regulator crackdowns
DCB has a regulatory history. Bad actors used it to push hidden subscriptions through misleading creatives in the 2010s. Regulators noticed.
The GSMA Code of Conduct for Mobile Operators sets the floor. Member carriers commit to clear price disclosure before purchase, opt-in confirmation, easy unsubscribe by SMS keyword, and refund processes that match retail standards. Aggregators like Bango, Boku, Fortumo, and Docomo Digital bake these rules into their merchant onboarding.
Local regulators add teeth. The UK's Phone-paid Services Authority (PSA) imposed fines of over £4 million between 2018 and 2022 on operators running misleading subscription traps. India's TRAI mandated double opt-in for all premium SMS in 2018. Italy's AGCOM forced carriers to default DCB to "off" on every new SIM in 2020. Spain followed in 2021.
[UNIQUE INSIGHT] The pattern is the same in every market. Aggressive affiliates spike complaint volume. Regulators tighten rules. Carriers raise the compliance bar at the aggregator level. Volume drops 30 to 60 percent in the first quarter post-regulation, then rebuilds on cleaner creative within 12 to 18 months.
For an affiliate running smartlinks on mobile-content offers, this means one rule. Read the GSMA Code. Match the disclosure to the carrier's strictest market. Skip the gray-area landing pages. The traffic that survives a regulator audit compounds. The traffic that does not gets the offer suspended for everyone.
Real-world example with numbers
A media buyer runs a subscription VOD offer in Indonesia. The deal: $4.20 CPA on a successful weekly subscription. Payout posts after the second renewal cycle to filter out instant cancels.
The 30-day numbers:
- Ad spend on Meta and TikTok: $9,800
- Clicks delivered: 142,000 at an average CPC of $0.069
- Landing-page-to-PIN-entry rate: 11.2 percent
- PIN-to-paid-subscription rate: 38 percent (carrier-side)
- Net successful subscriptions: 6,041
- Gross commission: 6,041 x $4.20 = $25,372
- Net profit: $25,372 minus $9,800 = $15,572
- ROAS: 2.59
The carrier, the aggregator, and the merchant all earn before the affiliate sees a cent. The end-user pays $1.40 per week. After 8 weeks, the merchant clears its acquisition cost and starts earning payout tail. The affiliate moved on to the next country.
That structure, low ARPU multiplied by huge prepaid bases, is what makes DCB the highest-volume rail in emerging markets.
Mobile billing in 2026
[UNIQUE INSIGHT] Two shifts are reshaping DCB right now.
First, carriers are rolling out frictionless one-tap flows in more markets. Bango's Audiens platform and Boku's M1ST network now cover 7 billion subscribers across 174 countries combined (Boku Q4 2024 trading update). The PIN flow is still the default for cold traffic. The one-tap flow is becoming the default for app store top-ups and known users.
Second, AI Overviews and TikTok Search are pushing more first-time mobile users into commercial intent searches. The traffic landing on DCB offers in 2026 is younger, more mobile-native, and more likely to abandon a card form than the 2020 cohort. DCB is no longer the fallback. In several markets, it is the primary rail.
The conversion rate gap between DCB and card checkouts in emerging markets has widened from 2x in 2020 to 4x in 2025. The gap will keep widening as long as card issuance lags mobile adoption. For affiliates, advertisers, and aggregators, mobile billing is not a legacy rail. It is where the next billion paying users live.
Related terms
Frequently asked questions
What is the difference between mobile billing and a mobile wallet?
A mobile wallet (Apple Pay, Google Pay) routes the charge to a card or bank account stored on the device. Mobile billing routes the charge to the carrier's monthly bill or prepaid balance. No card is involved. The carrier collects the money and remits a share to the merchant.
How much does mobile billing cost the merchant?
Carrier revenue share runs 10 to 50 percent of the gross transaction. Premium SMS sits at the high end. Bundled DCB through aggregators like Bango or Boku sits closer to 10 to 15 percent on app store top-ups. The exact split depends on the country, the carrier, and the content category.
Is mobile billing safe from chargebacks?
Safer than card billing, not immune. Carriers handle disputes through their own customer service, so chargeback rates run lower than the 0.9 percent card-industry average. Refund volume still spikes when affiliates run aggressive landing pages. Regulators (Ofcom, ANACOM, TRAI) audit complaint rates and can suspend offers.
Where does mobile billing work best?
Markets with low card penetration and high prepaid mobile use. South Asia, Sub-Saharan Africa, parts of Latin America, the Middle East, and Southeast Asia. The GSMA reports 1.75 billion mobile money accounts globally as of 2024, most concentrated in those regions.
Can affiliates promote mobile billing offers?
Yes. Mobile-content offers run on most major affiliate networks under the CPA or CPL model. Payouts range from $0.50 to $40 per subscription, depending on the country and the carrier. Compliance is strict. The GSMA Code of Conduct and local regulators ban misleading creatives, hidden price disclosures, and forced opt-ins.