Telecomms regulator Ofcom has published market data for the third quarter of 2008. It's calculated that total revenue across the four largest mobile network operators (O2, Orange, T-Mobile and Vodafone) increased by 1.5% compared to the previous quarter. Call revenue was up by 2.3% while SMS and MMS revenue fell by 2%. Despite the rise in call revenue, UK call volumes declined by 0.05% compared to the previous quarter, which is the first such fall since 2005. Total subscribers grew by 1.2% during the quarter to 68.2 million. [Ofcom report]