Carphone Warehouse, Europe’s largest mobile phone retailer, beat quarterly revenue forecasts, boosted by demand for smartphones, and said its megastore partnership with US group Best Buy had a successful launch, reports Reuters. Sales at stores open at least a year rose 3.7 percent at constant currencies in its main European business in the 13 weeks to July 3, its fiscal first quarter, ahead of analysts’ average forecast of 2 percent in a company poll.