adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};Darren Kao has two apps on his Sony Xperia Android phone -- WeChat to stay in touch with his Chinese clients, and the Starbucks wallet, for his morning caffeine fix. For everything else, he’s got his trusty BlackBerry.