You are downloading the VIVA Communicator XAP file v3.6.0.131 for Windows Phone. VIVA Communicator is a free Business App: The Viva Communicator app allows users to make and receive closed Voice over IP (VoIP) calls, send text messages, pictures, videos and other file attachments. You can now download the offline XAP package file to install & try it.
Download Locations for VIVA Communicator 3.6.0.131 XAP file
Package File
Please Click Here > to retrieve available package files for VIVA Communicator.
Please be aware that the VIVA Communicator XAP file you are to download is hosted on the Microsoft Store CDN server. You can read more about VIVA Communicator or get it on Microsoft Store.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline VIVA Communicator XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.