Lloyds TSB is offering on-demand balance updates via text message to customers as part of its mobile phone service.
The service, claimed to be a UK first, enables customers to check account balances and details of their last six transactions and was launched in response to customer demand for instant updates.
Last September, the bank launched its mobile offering, which includes high and low account balance text alerts, overdraft warnings and a top-up facility for pre-paid mobile phones.
The service, which took four years to develop, was developed in partnership with supplier Monilink and sits on the banking network of UK payments processor Vocalink.
Full mobile services are available to Lloyds TSB customers at the monthly rate of £2.50. Barclays, Abbey and Alliance & Leicester are also offering paid SMS services.