PhoneCheck: Used Phone Test

Buying or selling a second-hand phone? PhoneCheck runs a complete hardware checkup in minutes and gives you a shareable report — so you know exactly what you're paying for before money changes hands.

No account. No ads. No data leaves the phone. Everything runs 100% offline.

✅ 10 HARDWARE TESTS

• Display & Dead Pixels — full-screen colours reveal dead pixels, discolouration and backlight bleed
• Touchscreen — drag across a grid to find dead touch zones
• Speaker & Earpiece — play a tone through each output separately
• Microphone — record and play back to verify the mic
• Cameras & Flash — live preview of front and back cameras, flash test
• Sensors — accelerometer, gyroscope, compass, proximity and light, with live readings
• Battery — health, temperature, voltage and charge status straight from Android
• Battery Originality — capacity-wear estimate (clearly labelled as an estimate)
• Connectivity — Wi-Fi, Bluetooth, GPS, SIM and NFC presence check
• Vibration Motor — trigger and confirm

📋 INSPECTION REPORT
Every test you run is collected into a clean pass/fail report with device details — share it with the seller or buyer to negotiate with confidence.

📞 SECRET DIALER CODES
A curated, brand-wise directory of useful dialer codes (IMEI check, hardware test menus and more) for Samsung, Xiaomi, Vivo, Oppo and others. Dangerous codes are clearly flagged so you don't reset a phone by accident.

🤝 HONEST BY DESIGN
Some things no app can truly detect — like whether a battery or screen was replaced, or hidden motherboard damage. PhoneCheck never pretends otherwise: estimates are labelled as estimates, so you can trust what the report says.

🔒 PRIVACY FIRST
• Works fully offline
• No account, no sign-up, no analytics
• Camera and microphone are used only for the tests, on your device

Perfect for buying a used phone, checking a phone before selling it, testing a repaired device, or making sure a new phone is fault-free within the return window.

Inspect before you invest — install PhoneCheck.