Avenir is offering free BIS for all O2 BlackBerry connections on selected voice tariffs until the end of the month.
Avenir dealers can offer free BlackBerry BIS to new and existing customers at the point of connection or upgrade when connecting to a 24-month voice business plan with a BlackBerry device.
Customers taking a 36 month deal will also be eligible for 24 months free BIS.
Tariffs include 02 Business Single 300, 600, 1,200 and unlimited, O2 Business Share 1,300, 2,000, 5,000 and My Business BlackBerry.
Avenir said the deal, which launched at the beginning of April is scheduled for one month only and ends April 30.