● RF Software Related - (2015/01 ~ 2021/11) *. GSM/WCDMA/LTE/CDMA/TDSCDMA/5GNR-Sub6/5GNR-mmW *. Modem: AT Command/RF Bringup/QMI-QCRIL_QCRIL_HOOK *. RF Driver Development (Including RFFE SW Control, Qualcomm PA/ASM/GRFC/Tuner/Coupler/FBRX) *. 3rd Party RFFE MIPI Device Porting (Including PA/ASM/Tuner/Coupler/FBRX) *. RIL Driver/Modem Driver Design (Power Mngr/SD Card Detection/Phone/Message/Settings ...etc) *. UIM Driver Integration (SS/DSDS/STK) *. QCN/NV/MBN/EFS Architecture *. RF Calibration Process Participant *. SAR Power Back Off SW Porting/Integration *. LTE CA/5GNR ENDC(NSA/SA) *. TE Operation: - Anrisu TE: 8475A/8820C/8821C - Keysight TE: E7515B/E6640A/mmW CATR - 5G mmW Beamforming Char Calibration Process ● Carrier Certification Related (2015/01 ~ 2021/11) *. Lab Comformance Test (GCF/PTCRB) *. Carrier Certification Pre-test *. ATT/Verizon Carrier Certificate Issue Fixing *. Certification Issue Debug: 3GPP/GCF/PTCRB/ATT/Verizon/Sprint/TMO/Compulsory ● Android Mobile Related(Qualcomm) - (2011/10 ~ 2021/11) *. Android APP/API/UI/Service/SELinux *. Android BSP Kernel Driver *. Android Framework/JNI *. Battery/Modem Thermal Management *. LCD/Blutooth Driver porting *. MSP430 MCU Control (Firmware Intergration) ● Windows OS Related(Qualcomm) - (2011/11 ~ 2019/11) *. Windows Mobile OS: WE8H, WIN10, WoS *. Windows KMDF/UMDF Driver *. Windows Modem WMRIL Driver *. Windows RF Driver Development *. Windows Power Management Analysis *. LCD/Touch Panel Driver Porting *. Windows on ARM(Snapdragon) *. Debug Tools: WINDBG/ETW/WPP Trace/Field Medic ● Qualcomm Solution 2G/3G/4G Platform: MSM8974/MSM8992/MSM8909/MSM8996/SDM660/SDM850/QCM4290 Non-WWAN Platform: APQ8909 5G Platform: QCM6490/SM7225 ● Experience of Biz Trip *. WIN10 WINHEC 2015 Workshop at Shenzen in China *. WIN10 WINHEC 2018 Workshop in Taipei *. Qualcomm Worksop at Shenhai/ZhangJiang in China *. On-site support (2015) of Verizon LAB Filed Trial (LA/Irvine)

Application development. Gallery APP. SQLite Database. File Browser. Social Network(Facebook, Picassa, RenRen, KDDI, ...etc.) NFC. UI.