• Ensured compliance of Samsung devices with AT&T 10776 Test Scripts and company standards, utilizing hardware (Rohde & Schwarz - R&S CONTEST, CMW 500 and Keysight equipment) for lab testing.• Conducted 3GPP specs testing for 5G, LTE, 3G, and Wi-Fi on live/lab networks, including Full-Scale Testing, Regression Testing, Feature testing, and performance testing on Samsung devices.• Implemented and deployed Test Automation using ABD commands and Python scripting, providing technical analysis and insights to the teams and R&D.• Proficient in telecommunication technologies including VoLTE, IMS, IR94, CMAS, WFC, EPDG, etc., and experienced in RF sample hardware fabrication and RF port mapping.• Conducted and delivered Test procedures/Test devices to AT&T Headquarters, coordinating various testing activities including Functional, Interoperability, Performance, Current/Battery Consumption, White & Black-box, Field, Usability, Spec-verification, Issue Reproductions, and Regression Testing.• Experienced in troubleshooting device testing issues in weak signal areas, verifying test area reliability, observing device performance to raise issues, collecting logs for improvement, conducting initial stage failure analysis, and creating lab reports summarizing issue reports.• Troubleshot calls with carriers (AT&T/Cricket/TMO), involving log collection and analysis, and collaborated with the Project Manager, Samsung R&D, R&S Engineer, and Hardware Engineer to resolve failure issues.

• Help students improve their problem-solving skills by reviewing concepts and various math skills• Understand difficulties in the problem-solving process and propose how to access problems• Identifying the intention of the students' questions, suggesting ways to approach them when faced with similar problems, and helping them solve the questions from various perspectives.• For statistics, help them how to use professional calculators.• Especially tutoring in the Math Lab and charge of subjects ranging from Adult Basic Education to Calculus and Statistics

• Developed a mobile application based on AI and cloud computing for social network services at a commercial level by utilizing Android Studio with Java• Responsible for testing software quality assurance and designing a user-input validation module running on AWS(Amazon Web Services), and Android devices.• Plan the user interface of the application for customer accessibility and convenience by collaborating and discussing the program requirements with diverse clients and the development team of 4 to ensure parameters and requirements.Through this experience, I recognized the importance of security in online communication and how to feedback on the result to improve the system. I also could get a better understanding of these fields of work.