Yes, you need to SMS your query to the Customer Centre of the bank in the following formats:
Balance enquiry: 'Service Code' space '6-Digit of your PIN' space 'Account Type'
Available credit limit: 'Service Code' space '6-Digit of your PIN' space 'Account Type'
Last 5 transactions: 'Service Code' space '6-Digit of your PIN' space 'Account Type'
Credit card payment: 'Service Code' space '6-Digit of your PIN' space 'Sender Account Type' space 'Beneficiary Account Type' space 'Nominal'