7 things to check on a used smartphone

The screen went black for a beat, then flashed back to life under the fluorescents. You could taste the coffee and feel the seller's hesitation. That tiny blackout is the kind of thing that makes you hold a phone a little longer. ## Does the screen actually show everything Turn the display brightness up and tilt the phone. Look for tiny bands, dead pixels, and areas that dim at certain angles. A hairline pressure mark or a faint rainbow at the edge often means the LCD or OLED layer has been repaired or stressed. A screen that shows uneven color or a faint touch-dead stripe can cut a phone's practical value by clear, observable steps. ## How healthy is the battery (real numbers) Check the battery health setting, if available. Buyers usually treat anything under 80% capacity as a replacement needed. A battery at 85–95% is normal for a used model. A phone with battery reported below 80% will make people negotiate or walk — that's the single most common functional complaint. ## Does every button and port work Press the power, volume, and mute buttons. Plug in headphones and a charger port if present. Test the mute toggle and any physical sliders. Ports that feel loose or buttons that stick are structural problems. Cosmetic scratches on the casing rarely matter as much as a brittle charging port. ## Camera checks that reveal concealments Open the camera and switch through lenses at full resolution. Look for shadowed corners, soft focus, or a hazy filter effect that doesn't clear when you wipe the lens. A scratched or delaminated camera glass is often hidden by cases but shows quickly in a live photo. Multiple cameras working cleanly is one of the strongest functional signals. ## Wireless, sensors, and connectivity Turn Bluetooth and Wi‑Fi on and pair to a nearby device briefly. Walk a few steps while watching GPS lock time. Test Face ID or fingerprint unlock. Sensors and radios are what fail after drops. Connectivity that drops or inconsistent GPS fixes point to real repairs, not cosmetic fixes. ## Check the chassis and water resistance signs Look for a compressed SIM tray seal, corrosion inside the SIM slot, or residue around edges. Surface scratches are cosmetic. Brownish residue near speaker holes or under ports usually means moisture intrusion. For brands that advertise water resistance, a compromised seal is a structural issue that can require expensive repairs. ## Papers, box, accessories — why they actually move price Original charger, box, and manuals add a measurable premium. Completeness typically adds about 5–15% to what a similar phone sells for. A phone with original charger and box is easier to trust and often sells faster. - Quick checklist: power on and watch for blackouts; set brightness to max and scan for bands; check battery health (80% threshold); test all buttons and ports; run camera through every lens; pair Wi‑Fi/Bluetooth and test GPS; inspect SIM slot for corrosion; confirm charger and box presence Check the current today's gold price on , then search eBay sold listings for similar finished pieces. Facebook Marketplace works for local gold buyers.

Fast checks

• Bring whatever supports ownership and condition (receipts, boxes, service notes).

• Make the demo easy: charged battery, correct cables, and a quick real-world test.

• Include accessories that make it complete (charger, case, remote, keys).

• Disclose flaws up front — surprises widen discounts more than known issues.

• Compare against sold prices, not asking prices.

• Decide if you want speed today or maximum value with more effort.

• If testing isn’t possible, price the uncertainty like risk, not hope.

• Keep it simple: fewer unknowns usually means a tighter number.

If you cannot demonstrate it works in under a minute, expect the offer to reflect that uncertainty.