PARIS  - Lighter, faster and even smarter smartphones will premiere at the world’s biggest mobile fair next week, sparking a race for ways to prevent network overload from rendering the phones “dumb”. Mobile phone giants Nokia, LG and Sony are among a long list of manufacturers which will show off their latest offers during the four-day Mobile World Congress, which opens in Spain’s Barcelona on Monday.  “We are likely to see a number of high-end Android phones with very fast, light, quad core processors,” IHS Global Insight analyst Ian Fogg said.