RingCentral

With an intelligent integrated experience that lets you make a massage, video, and phone regardless of where you are, this app enables you to work with the desktop app from anywhere and includes all the contacts you need to stay in the same team. And phones can all be delivered in one application. 

RingCentral will enable you to get your business done more efficiently, and you will need to know where you are without any hassle. You and your contacts will also get more convenient and efficient service. 

It includes features that allow you to create groups for projects, specific topics, or departments, share links and files without size or storage limit, and invite visitors outside your organization for free. It also can connect to audio via HD video conferencing, dial local and global numbers, share screenshots and work with whiteboards in real-time. 

It does not require any knowledge and is very easy to download, so it is straightforward to use even for an inexperienced person. Also, find your way to phone calls for SMS and Pax, using a single business phone number, access to advanced call options like call park, call flip, and more, and efficiently manage incoming calls with a multi-level automated service, sending videos and messages together. It also includes an unlimited number of meetings with a plan so you can use it to perform a straightforward task.