A BlackBerry Messenger 7 (BBM7) update allows users to make free voice calls when they are connected to the internet through Wi-Fi.
The service previously only allowed customers to share text messages and pictures, so this added functionally may help to boost the manufacturer's currently-flagging customer base.
Research in Motion (RIM), the creator of BlackBerry devices, is currently struggling to compete with technology-market rivals Samsung and Apple.
Owners of devices running the BlackBerry 6 operating system or newer should be able to utilise the beta version of BBM7 now.
The company plans to unveil its latest Blackberry 10 (BB10) software on January 30th, and buyers of consequent, compatible smartphones should be able to take advantage of the improved service too.
People using other branded smartphones could download the Skype VoIP service application as an alternative solution.
Messaging and voice calling over the internet can offer a free way of communicating with friends and family, allowing customers to lower minute and SMS allowances to reduce bills.
Posted by Claire Marshall