Guide
Used Phone Checklist Before You Pay
Signal practical guide · Updated August 2026
Device menus and features can differ by model and software version.
✓ Verify the IMEI using appropriate official channels.
✓ Test the whole display and touch response.
✓ Test every camera, speaker, microphone and charging port.
✓ Insert a SIM and check network functions.
✓ Check buttons and biometric unlock features.
✓ Ask for proof of purchase or warranty when available.
✓ Compare the asking price with current market prices.