Barclays is offering a free security download to customers who log into their bank accounts on their smartphones.
The move to offer Kaspersky Mobile Security software follows a decision last July by the bank to provide customers logging in on their PCs with Kaspersky Internet Security for free.
The mobile security software can be easily installed on web-enabled phones, Barclays said. The system allows mobile users to remotely wipe data from their phones if they are stolen, and also provides defence against viruses, trojans, worms, spyware, backdoors, keyloggers, rootkits, phishing and spam.
If a new SIM card is put in the phone, the software will send a hidden text message, with the details, to the device provider and authorities.
Sean Gilchrist, director of electronic banking at Barclays, said it was "important that customers protect their mobile phones in the same way they do their computers from all threats, by downloading this new software".