US Patent 11937318 Dual mode transmission in a controlled environment

A dual-mode mobile device and a method for coordinating calls for the dual-mode mobile device over a first and second connection within a controlled environment is disclosed. The method includes communications between a monitoring server and the dual-mode mobile device over the first connection while the dual-mode mobile device conducts the call over the second connection. The monitoring server transmits control messages to the dual-mode mobile device to control operations of the dual-mode mobile device and establishment of the call and also monitors operations of the dual-mode mobile device as well as the communications transmitted and received by the dual-mode mobile device during the call.