Quality Control

20-step inspection. 100% fully tested.

Strictly control all raw materials and production processes. Every product is 100% fully inspected through 20 rigorous steps — production, appearance and function — before it ever leaves our warehouse.

Inspection steps

100%

Fully tested

3-stage

QC pipeline

Premium Quality

Consistent & Reliable

20-Step Inspection

100% Fully Checked

Stable Supply

For Long-term Partnership

Trusted by Partners

Worldwide Wholesale Choice

Our 20-Step Process

Three inspection stages, one uncompromised standard

Every part flows through a fixed 3-stage QC pipeline — Production, Appearance and Function — with clear checkpoints at each step.

1. Production Test

Performance Test
Pressure Test
Automation Test
Compatibility & Adaptability
Safety Test
Interrupt Test
Aging Test

2. Appearance Test

No Scratches or Flaws
Display Color
Backlight Firmness
Flex Cable
Home Button Hole
Frame Flatness
Mounting Test

3. Function Test

Static Electricity
Touch Function Test
LCD Display Test
Touch ID Function Test
3D Touch Function Test
Sunglass Test

Process Overview

20-step inspection process

A visual summary of how every KINGDAT part is verified — from raw materials to final packing.

iPhone Line

iPhone screen & small-parts inspection

Every screen goes through thickness, frame matching, 3D touch, dead-pixel and oleophobic-coating tests. Every back-housing small part is verified for mute, volume, power, recording, Lightning and wireless charging.

Samsung & iPad Line

Each screen. Every test. Total reliability.

Samsung screens: glass appearance, display, touch and Touch ID verification. iPad screens: appearance, cable connection, 3D touch and touch response — before packing.