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Buying a used phone?Test every part in 2 minutes before you pay.
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.