Gains from Vodafone ensured that the mobile telecommunications sector was in the top spot on Thursday, with the company impressing with its third-quarter results.The FTSE 100 telecoms company said organic revenues fell 1.8% to £11.38bn year-on-year for the quarter, experiencing the biggest decline in the take up of services in Europe, though this was largely expected.However, despite the decline, Vodafone said that full-year adjusted operating profit would still come in at the "upper half of the range of £11.1bn to £11.9bn".The stock was up 1.41% at 172.75 this afternoon; it has now risen nearly 12% in the year to date.AIM-listed mobile content group Mobile Streams was also a high riser this afternoon, extending gains after its impressive first-half trading update last week.The company, which provides apps, games and eBooks, reported on January 31st that revenues in the first six months of the year had risen over 170% year-on-year, which cash had jumped rom £0.7m to £2.2m. The shares, up 5.92% at 40.25p today, have now risen by a third in 2013 so far. Meanwhile, over the past 12 months, the stock has surged nearly 300%.Top performing sectors so far todayMobile Telecommunications 4,051.94 +1.67%Health Care Equipment & Services 4,040.58 +1.17%Construction & Materials 3,674.88 +0.80%Travel & Leisure 5,801.53 +0.77%Insurance (non-life) 1,732.74 +0.70%Bottom performing sectors so far todayPersonal Goods 21,615.39 -4.06%Fixed Line Telecommunications 3,149.17 -1.23%Pharmaceuticals & Biotechnology 10,025.30 -0.84%Household Goods & Home Construction 8,965.82 -0.81%Automobiles & Parts 5,770.35 -0.80%BC