Knowledge Center

Practical digital-service guides

Task-first banking, telecom, fintech, government, security, business and help-center information for Nigerian users.

Business

Common POS Machine Errors in Nigeria and How to Fix Them

3 Nov 2025 POS terminals may display Declined, Issuer Unavailable, Network Error, Do Not Honour, Invalid PIN, Reversal Pending or other messages. This guide explains what those responses generally mean and gives a safe next step without pretending every terminal or bank behaves identically. Agents learn to check connectivity, paper, battery, time settings and transaction status before retrying. Customers learn when to review … Read Guide

Government

How to Check, Link and Update NIN Across Nigerian Networks

3 Nov 2025 NIN and SIM issues require more care than an ordinary airtime or data request because identity information is involved. This guide explains how to check the available NIN-SIM status options through the harmonised network route, use official MTN, Airtel, Glo or 9mobile channels and visit an authorised service centre when a record must be corrected. It separates checking, linking and … Read Guide

Telecom

How to Check Glo Data Balance and Understand Each Data Bucket

1 Feb 2024 Dial *323# on your Glo line to check the main data balance and expiry. This guide focuses on interpreting multiple Glo data buckets, checking an hourly or bonus allowance, handling a missing purchase and choosing *312# only when you actually want to buy or manage a plan. … Read Guide

Telecom

Airtel Nigeria USSD Codes, Including *444# Bank-Linked Recharge

23 May 2023 Airtel customers can use Nigeria’s harmonised codes for routine line services and Airtel’s separate *444# route for purchases from a linked bank account. Learn which route fits each task, what to verify and how to avoid authorising the wrong purchase. … Read Guide

Telecom

T2 Mobile USSD Codes After the 9mobile Rebrand

21 May 2023 9mobile now operates as T2 Mobile. This transition guide separates the name change from the harmonised Nigerian codes subscribers use for balances, data, recharge, support and NIN-SIM services, and explains how to verify an old 9mobile instruction before acting. … Read Guide

Telecom

MTN Nigeria USSD Codes: Data, Airtime, Share, Borrow and Support

23 Apr 2023 Use MTN Nigeria’s current harmonised codes for airtime, data, sharing, borrowing, subscription control and NIN-SIM services. This guide also explains MTN-specific data gifting routes, what each result should show and what to do when a session fails. … Read Guide

Banking

ProvidusUnity Bank: Digital Access Guide for Former Unity Bank Customers

27 Feb 2023 Unity Bank has transitioned into ProvidusUnity Bank. Use this guide to confirm the current app, web, branch or support route, protect an account during the migration and avoid unverified claims that the old *7799# shortcut remains active. … Read Guide