Half of all mobile phone manufacturers reported malware infections, voice or text spam attacks and other security incidents last year, according to research by McAfee.
The firm's Mobile Security Report 2009 (PDF) found that 70 per cent of manufacturers think that mobile security is critical to their future, and highlight device protection as an important step.
"Attempts to make the mobile ecosystem more open have shown early signs of success, yet attacks on mobile networks and devices continue to grow in complexity and sophistication," said Victor Kouznetsov, senior vice president of McAfee Mobile Security.
"Hence it is encouraging to see that mobile manufacturers are looking to regain control in providing security functionality to safeguard their users."
Nearly half of mobile manufacturers said that the cost of patching and fixing affected devices had significantly affected their business, the report found.
In addition, 81 per cent of manufacturers are worried about mobile payments, 69 per cent are not convinced by the safety of installing applications, and 66 per cent are concerned about Wi-Fi and Bluetooth connectivity, according to the research.