The video explains how mobile networks recover from failures that occur during handoffs, when a device moves between base stations. It describes the typical causes of handoff failures, such as weak signal strength at the target cell, timing mismatches, and resource shortages. The presenter outlines the protocol mechanisms that detect a failed handoff, including Radio Resource Control (RRC) messages and transport‑layer acknowledgments. Upon detection, the source base station buffers outbound packets and initiates retransmission once the device re‑establishes a stable link, often using a make‑before‑break strategy to maintain a temporary parallel connection. The transport layer, especially TCP, plays a key role by handling lost packets through retransmission. The video also covers fallback options like switching to an alternative radio, and the importance of rapid re‑measurement and re‑selection of target cells to minimize service interruption. Finally, it emphasizes the need for coordinated actions across physical, network, and transport layers to ensure seamless user experience despite handoff disruptions.