Samsung Galaxy S21 ultra 5G

Power & Charging

• ✔ Wired charging check
• ✔ Wireless charging check
• ✔ Charging speed test
• ✔ Overheating while charging

Battery Health

• ✔ Battery health %
• ✔ Cycle count
• ✔ Drain test under load
• ✔ Swelling/leakage check

Display & Touch

• ✔ Touch responsiveness
• ✔ Dead pixel test
• ✔ Brightness & auto-brightness
• ✔ Crack/scratch inspection
• ✔ Color accuracy
• ✔ Special display features test

Performance & Processor

• ✔ App load time
• ✔ Smooth multitasking
• ✔ Benchmark test
• ✔ Thermal performance

Camera System

• ✔ Rear camera quality
• ✔ Front camera quality
• ✔ Autofocus test
• ✔ Flashlight test
• ✔ Camera modes check

Audio & Sound

• ✔ Earpiece clarity
• ✔ Loudspeaker quality
• ✔ Microphone clarity
• ✔ Audio port test
• ✔ Wireless audio pairing

Connectivity

• ✔ Wi-Fi test
• ✔ Mobile data check
• ✔ GPS accuracy
• ✔ Bluetooth range
• ✔ NFC test
• ✔ Hotspot function

Security & Authentication

• ✔ Fingerprint sensor
• ✔ Face recognition
• ✔ Lock/unlock
• ✔ Security in apps

Buttons & Switches

• ✔ Power button
• ✔ Volume buttons
• ✔ Mute switch
• ✔ Home button

Sensors

• ✔ Proximity sensor
• ✔ Ambient light sensor
• ✔ Accelerometer
• ✔ Gyroscope
• ✔ Compass
• ✔ Barometer

Software & System

• ✔ Factory reset & OS update
• ✔ No account lock
• ✔ IMEI check
• ✔ App Store/Play Store test
• ✔ Full diagnostics

Final Quality Assurance

• ✔ Physical inspection & cleaning