Asus has raised its Zenfone shipment forecast for this year, from 25 million units to 30 million, say supply chain sources. It was said that monthly Zenfone 2 shipments would reach 2 million in May, rising to 2.5 million – 3 million units in June. The sources also said that Zenwatch and Vivowatch shipments this year will fall between 300,000 and 500,000 units.