British mobile phone giant Vodafone has announced a drop in quarterly revenue as strains across its European operations offset solid progress in emerging markets.
Group revenue slipped 1.5 per cent to STG9.587 billion ($A17.58 billion) in the group's third quarter, or three months to the end of 2013, compared with the equivalent period a year earlier, Vodafone said in a statement.
"Our emerging market businesses are growing strongly, supported by consistent execution and accelerating demand for data," said chief executive Vittorio Colao on Thursday.
"In Europe, conditions are still difficult, and we continue to mitigate these challenges through on-going improvements to our operating model and cost efficiency."
He added that Vodafone was optimistic over the group's revenue performance improving "as regulatory headwinds ease and customer appetite for video and content services increases".
