The first thing to do is make sure your preferred provider can deliver all the features and functionality your business needs. Can it deliver services such as call routing, call recording, IVR menus and free calls to mobile numbers? Can the provider seamlessly integrate your cloud-based telephone system with other services you use, such as video conferencing, messaging, and CRM tools? Can you use mobile devices as business phones? And are there extensions and opportunities to scale the system up as your business grows?