Examples are disclosed for hosting a communication session between a hybrid mobile device and a second communication device in an Internet Protocol (IP) based packet data network. A communications server functions as a bridge service between the hybrid mobile device and the second communication device enabling the exchange of multiple concurrent IP packet data media streams over multiple different IP based networks between the hybrid mobile device and the communications server. An IP data stream over an 802.11 WiFi communication link is characterized as the primary IP data stream and when its quality falls below a first threshold level, the hybrid mobile device will encode a second IP data stream that is the same as the original IP data stream and send a variable percentage of the second IP data stream over a cellular based IP communication link. If the quality of the IP data stream over the 802.11 WiFi communication link improves, a lesser percentage of the second IP data stream is sent over a cellular based IP communication link.