The Guardian reports that RIM will today unveil its latest attempt to get its BlackBerry device,  much-loved by corporate executives, into the hands of the wider public with a new mass-market version of the phone. The BlackBerry Curve 8520 – previously codenamed ‘Gemini’ – is expected to hit the UK next month with Vodafone understood to have signed up as one of the first networks to offer the handset.