Interop Technologies , a provider of innovative, virtualized IP networks and next-generation communication solutions, today announced that Union Wireless , headquartered in Mountain View, Wyoming, has selected the Interop Technologies CorePlusXSM VoWiFi solution to offer WiFi calling service to subscribers throughout Wyoming, Colorado, and Utah. Interop's cloud-based solution, which supports native and downloadable WiFi calling clients on the latest Apple and Android devices, enables Union Wireless subscribers to make voice calls and send text messages across any available WiFi network.