Just as media player maker Real Networks has gained a second chance to challenge Microsoft using the mobile phone as its platform, so Opera Software is looking to the handset to boost its browser. Its ambitions have received a huge boost this week with Nokia’s decision to instal the Opera browser on a mass market phone, the 6600, for the first time. Although Opera is the world’s number three browser, its market share on the PC is under 2%. It created a mobile phone version earlier this year, allowing the handset to provide full internet access rather than being limited to pages delivered through the WAP protocol, which has to redraw web pages its own format. Like Real Networks, which…