USSD codes make mobile banking easy. Recently, the developers featured MTN South Africa USSD codes. These Nigerian USSD codes are for Zenith Bank, Polaris Bank, First Bank, and Union Bank. Read also: The Central Bank Of Nigeria Unveils USSD Code For eNaira Transactions Zenith Bank USSD codes Zenith Bank offers many services using *996# USSD codes. … Continue reading USSD for Zenith, Polaris, First, Union 2023