DEVICE//PROOF
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Used hardware field checklists · Rev. 2026.07

Inspect the device. Not the pitch.

Twelve evidence-first checklists for private-sale electronics. Ask for proof, test the expensive parts and expose ownership locks before money changes hands.

Library
12 devices
Access
Public / free
Storage
Local browser
Network
No test uploads

Inspection library

Select the hardware in front of you.

12 / 12
PHN-APL01

iPhone

Verify parts history, battery condition, cameras, radios and Activation Lock before buying a second-hand iPhone.

15 checks14 min
PHN-AND02

Android phone

Check display condition, battery behaviour, cameras, update support and Google or manufacturer locks on a used Android phone.

15 checks15 min
CMP-MAC03

MacBook

Confirm battery cycles, display and port health, Apple Diagnostics, serial identity and Activation Lock on a second-hand MacBook.

15 checks18 min
CMP-WIN04

Windows laptop

Verify the real CPU, memory, storage, battery, panel, ports and firmware ownership before buying a used Windows notebook.

15 checks19 min
MOB-TAB05

Tablet

Inspect a used iPad or Android tablet for panel defects, battery drain, accessory support, radios and activation locks.

15 checks14 min
IMG-BDY06

Camera body

Check sensor condition, shutter count, autofocus, card slots, controls and ownership evidence on a used mirrorless or DSLR body.

15 checks20 min
IMG-LNS07

Camera lens

Inspect optics, mount, focus, zoom, aperture, stabilisation and decentering before buying a pre-owned camera lens.

16 checks16 min
GME-CNS08

Game console

Test storage, thermals, disc drive, video output, controllers, network services and account removal on a used console.

15 checks17 min
DSP-MON09

Monitor

Check a second-hand monitor for panel defects, input stability, refresh-rate claims, burn-in, stand damage and warranty identity.

15 checks15 min
WRB-WCH10

Smartwatch

Verify display, battery, sensors, charging, buttons, phone pairing and activation status on a used smartwatch.

15 checks13 min
AUD-HDP11

Headphones

Check drivers, battery, microphones, controls, wireless codecs, hinges, hygiene and owner pairing on used headphones or earbuds.

15 checks12 min
PCP-GPU12

Graphics card

Verify model identity, board condition, video memory, outputs, thermals and stable load before buying a used GPU.

15 checks22 min

Protocol

Five passes. One payment gate.

  1. 01Ask for current evidence.
  2. 02Inspect under bright light.
  3. 03Test high-cost functions.
  4. 04Erase and clear locks.
  5. 05Compare exact sold units.

Safety note

A checklist is evidence discipline—not a guarantee.

Use DeviceProof as a general inspection aid. Meet in public, keep credentials private, never bypass owner or organisation locks, and stop for swelling, smoke, burning smell, exposed wiring or abnormal heat. Do not open mains-powered gear or damaged batteries.