Your phone can help you move money in seconds, but choosing the wrong banking habits can expose your account to fraud. In Nigeria, customers commonly use two channels for everyday banking: USSD codes and mobile banking apps.

Both offer convenience, but they come with different security risks. So, which one should you trust when transferring money, checking your balance or paying bills?

The answer depends on how each service is secured, the condition of your phone and SIM, and how carefully you handle your banking details.

What Is USSD Banking?

USSD banking allows you to perform certain banking transactions by dialling a bank-provided short code, usually beginning with an asterisk (*) and ending with a hash (#).

It works without mobile data or an internet connection, making it useful when your data runs out, your internet connection is unreliable or you have a basic phone.

Depending on your bank, you can check your balance, transfer money, buy airtime and access other services using a USSD menu.

However, USSD banking is not risk-free. Fraud involving stolen phones, compromised SIM cards, exposed PINs or unauthorised access to your phone number can put your account at risk.

What Is Mobile Banking App Security?

Mobile banking apps allow customers to manage their accounts through applications provided by their banks. Depending on the bank, these apps may offer transfers, bill payments, transaction history, card controls and other services.

Apps can provide additional security features, including biometric authentication, device registration, transaction notifications and spending limits. The specific features available vary by bank.

However, an app does not automatically protect you from fraud. A compromised phone, malicious software, stolen login details or a convincing phishing message can still put your money at risk.

USSD vs Mobile Banking Apps: The Key Differences

1. Internet exposure

USSD does not require mobile internet, so you do not need to connect to public Wi-Fi to complete a transaction. This reduces your exposure to some internet-based threats.

Mobile banking apps generally require internet access. Connecting through an untrusted network or downloading a fake banking app can expose you to additional risks.

2. Phone and SIM security

Both methods can be affected if someone gains control of your phone number or SIM card. An unauthorised SIM swap can create opportunities for fraud, especially when your number is used for account verification.

USSD users should protect their SIM cards and banking PINs. App users should also secure their devices, login credentials and registered phone numbers.

3. Authentication and transaction controls

USSD commonly relies on a banking PIN and the bank's transaction-verification process.

Mobile apps may offer biometrics, device verification, additional authentication and transaction limits. These features can provide extra layers of protection when properly implemented and enabled.

4. Fake links and malicious software

USSD does not require you to click a banking link or install an app to initiate a transaction. This reduces exposure to certain phishing and fake-app attacks.

Mobile app users must ensure they install the genuine application from an official app store or the bank's verified website. They should never enter banking credentials through links sent by strangers.

5. Detecting suspicious activity

Mobile banking apps may provide transaction histories, alerts and account-management controls in one place. These features can help users notice suspicious activity quickly.

USSD users can also receive transaction notifications, depending on their bank and settings. Regardless of the channel, check your balance and transaction alerts regularly.

Which Is Safer: USSD or a Mobile Banking App?

Neither method is universally safer. The security of a transaction depends on the bank's protections, the authentication required, the risks affecting your device or SIM, and your own behaviour.

A properly secured mobile banking app with biometric authentication, device verification and transaction controls can provide useful additional safeguards. USSD, meanwhile, can be convenient when you have no internet access and want to avoid certain online threats.

But neither method protects you if you willingly send money to a scammer, disclose your PIN or approve a transaction you do not understand.

6 Ways to Protect Your Money When Banking With Your Phone

1. Never share your PIN or OTP. Your bank should not ask you to disclose your confidential banking PIN or verification code to an individual claiming to be a support agent.

2. Use your bank's official USSD code. Confirm the correct code through your bank's official website or verified customer-service channel. Do not rely on codes circulated in random social media posts.

3. Download genuine banking apps. Verify the app's publisher and use official sources. Avoid applications sent directly to you by strangers.

4. Secure your phone and SIM. Use a strong screen lock, keep your SIM registration details private and contact your network provider immediately if your line suddenly loses service without explanation.

5. Enable available security features. Use biometrics, transaction alerts, device verification and transaction limits where your bank offers them. Never approve a transaction you did not initiate.

6. Act quickly if something looks suspicious. Contact your bank through its official channels to report unauthorised transactions, secure or restrict your account and follow its instructions. If you suspect a SIM swap, contact your mobile network provider too.

USSD and mobile banking apps both have a place in everyday banking. USSD offers convenience without mobile data, while banking apps may provide additional authentication and account-control features.

The safest choice is not simply the one that uses less technology. It is the one you access through your bank's genuine service, protect with strong security practices and monitor consistently.

Remember: Never share your banking PIN, OTP or verification codes with anyone, even someone claiming to represent your bank.