Key Responsibilities: Device & Network Validation Validate modem, firmware, and network behavior across:Qualcomm, MediaTek, and Apple chipsetsAndroid and iOS platformsTest attach, data, voice, roaming, IMS, and fallback scenarios 5G / LTE Test Coverage Validate5G SA / NSA attach & handoverLTE fallback and network reselectionVoLTE / VoWiFi call flowsData throughput, latency, and stabilityExecute mobility, handover, and RF condition testing Failure & Edge Case Testing SimulatePoor signalCongested