Mobile Network Operator (MNO)

A mobile network operator (MNO) is a telecommunications company that holds a licence for radio spectrum and owns or controls the network of towers, switches and systems needed to provide mobile voice, messaging and data services. It issues SIM cards, assigns phone numbers and bills its subscribers. Operators that rent capacity from such a network instead of owning one are called mobile virtual network operators.

In finance the term matters because operators became, in much of Africa, South Asia and other developing regions, the main providers of basic payment services. Mobile money was pioneered by operators, and services such as M-Pesa are run by them or by their subsidiaries. Even where banks and fintech companies provide the accounts, operators control channels and data that payment services depend on.

Operators began with assets that banks in low-income countries lacked. They had millions of customers, many with no bank account, each already identified by a SIM. They had a trusted brand and a network of shops selling prepaid airtime, which could be turned into a cash distribution system. And they had experience handling very large numbers of tiny prepaid transactions at low cost.

The commercial motive at first was to keep subscribers loyal and reduce the cost of distributing airtime, since an airtime top-up bought with mobile money pays no commission to a reseller. Over time financial services became a significant business line for many operator groups, and several have separated them into dedicated fintech subsidiaries.

• Issuer of the wallet. In the operator-led model the operator, or a licensed affiliate, holds the customer accounts, issues the electronic money and carries legal responsibility for the service.
• Distribution. The operator recruits and manages each mobile money agent, turning its airtime resellers into an agent network.
• Access channel. Customers reach their accounts through menus on the SIM, through USSD sessions and by text message, all of which run over the operator's network and work on basic phones.
• Partner to banks. In a bank-led model the bank holds the accounts while the operator supplies the channel and sometimes the agents. Savings, credit and insurance products are commonly offered with a bank or insurer behind the operator's brand.

Because every provider needs the mobile network to reach customers on basic phones, the operator's control of USSD and messaging is a competition issue. An operator that runs its own wallet may charge rival banks and fintech firms high prices for USSD sessions, give them poorer service quality or delay access. Regulators in several countries have intervened by setting terms for access or capping prices.

Operators also hold information of value to financial services. Records of top-ups, calling patterns and wallet activity are used to score customers for small digital loans. The operator's network delivers the one-time password messages on which banks rely, and operators sell services that confirm whether a SIM has recently been replaced or a number recycled. The privacy implications of these uses fall under data protection and telecommunications law.

An operator's telecommunications business is supervised by the communications regulator, which grants the spectrum licence. Its financial business falls to the central bank. The common approach is to require a separate electronic money license or payment service authorisation, often held in a distinct legal entity so that financial activity is ring-fenced from the telecoms company. Customer balances must be matched by funds held in trust or in dedicated bank accounts, a form of safeguarding, and the provider may not lend those funds out.

Identity rules link the two regimes. Most countries require SIM cards to be registered against an identity document, and that registration often serves as the first tier of know your customer checks for a basic wallet. Where the two regulators' mandates overlap, as with USSD pricing or interoperability between providers, they frequently act jointly.

The phone number acts as the account identifier and the SIM as a security credential, so weaknesses in telecoms processes become financial risks. In a SIM swap, a criminal persuades or bribes staff to move a victim's number to a new SIM and then resets the wallet PIN or intercepts banking codes. Numbers that are deactivated and reissued can expose an old account to a new subscriber. Network outages interrupt payments for whole regions, and staff or agents with system access can commit fraud. Operators counter these with stricter swap procedures, waiting periods after a SIM change and monitoring of agent and employee activity.

The spread of smartphones weakens the operator's hold on the channel, since apps run over any data connection and can be offered by banks, card networks and technology firms. Operators have responded by developing their own apps, opening programming interfaces to merchants and developers, and broadening into lending, merchant payments and remittances, in some cases aiming for a super app. In richer markets operators play a smaller part in payments, limited mainly to charging purchases to the phone bill and to earlier, largely unsuccessful, attempts to run a mobile wallet on the SIM.