The FTSE 100 Index was up 29.1 at 5149 after an hour's trading.
Vodafone has earned some breathing space as technology and telecoms stocks lead a rebound on the London market.
An upbeat trading update from US networking giant Cisco is helping sentiment after the Footsie fell more than 80 points yesterday.
Risers include Vodafone, up 3½p to 98¾p after testing four-year lows last night; and mmO2, up 2¾p to 47½p.
Among the tech shares, software group Sage is up 6½p to 195½p.
Major moves are also being made by media stocks, with Granada up 8¾p to 135¾p after the Government's Communications Bill raised the possibility of greater consolidation.
BSkyB is up 17p at 748p; and FTSE 250-listed Carlton Communications has lifted 15p to 268p.
The proposed legislation is also helping radio stocks, with Capital Radio up 70p at 855p; GWR ahead 15p at 276½p; and Chrysalis up 15p at 285p.
Elsewhere, easyJet's latest expansion plans got a warm welcome in the City. Its share price is up nearly 2% or 8½p at 445p after it outlined details of an option to buy British Airways' German subsidiary Deutsche BA.