ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,953, issued on July 21, was assigned to T-Mobile USA Inc. (Bellevue, Wash.).

"Flexible voice over WiFi (VoWiFi) handover to cellular" was invented by Lin Zhang (Overland Park, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A flexible solution for handling WiFi to cellular (W2C) handover (e.g., for voice over WiFi (VoWiFi) or video calls) includes: determining, for a wireless network, at least one live conversation performance indicator; based on the at least one live conversation performance indicator, determining at least one W2C handover parameter of a set of W2C handover parameters, the set of W2C handover parameters including a first W2C ha...