Workflow & Operations
Our Process.
Certified Grading & Diagnostics
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CHANNEL · GENERAL
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info@tr-vertrieb.deCHANNEL · RMA
RMA Department
RMA@tr-vertrieb.deOperating Hours: Mon-Sat 09:00 - 18:00 (CET).Typical response time: < 10 min.
Systematic Workflow
Operational Excellence.
Precision engineering in every step. From warehouse to worldwide delivery.
STEP · 01
01 / 06
Serialized tracking and receiving
Each unit is received, logged into our system, and given a unique IMEI label, so we always know its status at any given time. Phones are quarantined in a secure area.
Quality Management
The 52-Point Diagnostic
Every device passes this diagnostic before it is graded — run on NSYS, PhoneCheck and Blancco and documented in an individual test report per unit. The catalog covers 52 checks in nine categories; which ones apply depends on the model — model-specific features such as the Home button, 3D Touch, the telephoto lens or wired audio are only tested where present, and on some models additional model-specific tests bring the total to as many as 60.
MODULE · 01
Screen & Display
- 01Color & dead-pixel testCycles solid full-screen colors (red, green, blue, white, black) to reveal dead pixels.
- 02Touch grid testEvery zone of an on-screen grid is wiped clear to expose dead touch zones.
- 03Multi-touch testVerifies the display tracks two or more simultaneous finger inputs.
- 043D Touch / Haptic TouchMeasures the display's pressure sensitivity (where supported by the model).
- 05Display authenticity check (OEM check)Software-level detection of cheap third-party replacement panels instead of an original Apple display.
MODULE · 02
Cameras & Flash
- 06Main camera (wide)Function test and autofocus check.
- 07Ultra-wide cameraChecks the secondary camera lens.
- 08Telephoto camera (zoom)Verifies the optical zoom for defects.
- 09Front camera (selfie cam)Function test of the front-facing camera.
- 10Rear LED flashTests whether the flashlight fires.
- 11Camera authenticity checkDetects swapped or non-original camera modules.
MODULE · 03
Sensors & Biometrics
- 12Face ID (TrueDepth camera)Verifies the 3D face recognition system.
- 13Touch IDTests the fingerprint sensor (in the Home button of older models).
- 14Proximity sensorTests whether the screen switches off when held to the ear during calls.
- 15Ambient light sensorChecks whether the iPhone can adjust brightness automatically.
- 16AccelerometerDetects the orientation of the device.
- 17GyroscopeMeasures rotational movement of the iPhone in space (important for games/VR).
- 18Compass (magnetometer)Checks heading/direction detection.
- 19BarometerMeasures air pressure (for altitude readings).
MODULE · 04
Audio, Microphones & Speakers
- 20Bottom main loudspeakerAudio output and sound-quality test.
- 21Earpiece (top speaker)Tests the speaker used for phone calls.
- 22Main microphone (bottom)Records audio and analyzes the frequency response.
- 23Front microphone (next to the selfie cam)Test for videos and Siri.
- 24Rear microphone (next to the camera)Test for video recording with the main camera.
- 25Voice-quality comparison testSoftware-based cross-check of the individual microphones.
- 26Headphone jack / Lightning audioChecks wired audio output (where applicable).
MODULE · 05
Physical Buttons & Switches
- 27Side/Power buttonTests the on/off button.
- 28Volume-up buttonFunction of the upward volume control.
- 29Volume-down buttonFunction of the downward volume control.
- 30Ring/Silent switchChecks the physical mute switch on the side.
- 31Home buttonFunction test (on older iPhones and SE models).
MODULE · 06
Connectivity & Networks
- 32Wi-Fi moduleScans for networks and checks signal strength.
- 33Bluetooth connectionTests sending and receiving of Bluetooth signals.
- 34Cellular network detectionChecks the signal connection to the cell tower.
- 35GPS / location servicesTests the accuracy of satellite positioning.
- 36NFC moduleChecks the chip for contactless payment (Apple Pay).
MODULE · 07
Battery & Power
- 37Battery healthReads the maximum remaining capacity in percent.
- 38Charge cyclesCounts how often the battery has been fully charged.
- 39Battery stress testBriefly loads the system to detect voltage drops.
- 40Charging port (Lightning/USB-C)Checks whether current flows correctly.
- 41Battery authenticity checkDetects whether a non-authorized battery has been installed.
MODULE · 08
System & Mainboard Checks
- 42Vibration motor (Taptic Engine)Tests the haptic feedback.
- 43SIM card detectionChecks whether the SIM slot or eSIM works.
- 44CPU load testShort stress test of the main processor.
- 45RAM checkChecks the volatile memory for defects.
- 46Flash storage checkVerifies read/write capability of the internal storage.
- 47Mainboard authenticityVerifies that the mainboard belongs to the housing.
MODULE · 09
IMEI, Cloud & Security Checks
- 48Find My iPhone / iCloud lock statusChecks whether the device is locked to an Apple ID.
- 49SIM lock checkVerifies that the iPhone is unlocked for all carriers.
- 50MDM lock (Mobile Device Management)Detects whether the unit is a locked corporate device.
- 51Blacklist / ESN checkCross-checks whether the IMEI is reported lost or stolen worldwide.
- 52Financing status checkChecks whether outstanding carrier installment plans are still attached to the device.
The 52-point test, scroll by scroll
Take an iPhone apart virtually