Merchant Warehouse Inc., a Boston-based independent sales organization, today announced a second mobile phone-based payment-terminal software offering. MerchantWare Mobile for BlackBerry smart phones joins the company's iPhone application launched earlier this year (CardLine, 3/31). Research in Motion Ltd. manufactures BlackBerry devices. Henry Helgeson, Merchant Warehouse president and co-CEO, says the BlackBerry software, like the iPhone version, is free. "The big market is BlackBerry" because the devices are more popular than iPhones among business users, Helgeson tells CardLine sister publication ISO&Agent Weekly. Transactions go through Merchant Warehouse's payment gateway and are classified as card not present unless the merchant has bought a magnetic stripe card reader that connects via Bluetooth to the phone. Purchases then process as card-present transactions, which typically have lower discount rates merchants pay to have card payments processed. The mag-stripe reader from Seal Beach, Calif.-based MagTek Inc. encrypts card data, Helgeson says. "We don't have to worry about the card data being intercepted as it goes from our device to our gateway," he says. Merchant Warehouse is working on a third version of the mobile-terminal software for Windows Mobile-equipped phones.