Microsoft really, really wants you to try its mobile products. ZDNet reports that Microsoft has now ramped up the money it’s giving to consumers who trade in their old smartphones and tablets and is now offering them up to $350 that they can use to buy a Windows Phone smartphone or a Windows-based tablet or PC. Although Microsoft last week said it would only give customers up to $200 in credits for their used iPads, it seems the company is now letting interested buyers trade in iPhones, iPads, BlackBerrys and Android devices to get credits for Microsoft products. Microsoft has not yet said when or if the trade-in program will expire, ZDNet says.