RBS and NatWest have added an instant messaging service to their existing mobile banking apps for business customers.

The new service enables customers to contact bank advisers with queries about a variety of subject while they are using the app.

Mobile Chat was developed by Grapple, a UK m-commerce vendor, which said RBS and NatWest are the first banks in Europe to offer such a service.

Once online with advisers, customers can ask about the status of payments, direct debits as well as questions about fees and charges.

Mobile Chat is one of a number of recent initiatives where banks have integrated mobile technology into their core business. The same two banks earlier in March launched a P2P money transfer service.

Last week Mobile World Live revealed that UK rival Barclays is looking at launching a mobile phone service that combines a mobile package with its core business.

However, RBS and NatWest’s initial version of Mobile Chat will only be available for the iPhone. It did not say when the service will be an option for other operating systems.

“The number of RBS business banking customers banking on mobile has increased significantly within the past 12 months and we are delighted to be the first bank in Europe to launch mobile chat….,” said Aron Thompson (pictured), digital director, business and commercial, RBS.

RBS owns NatWest and is itself majority controlled by the UK taxpayer.