Knowledge Base
Grading Devices
This page outlines how we grade the devices we carry according to which criteria
Understanding the Different Device Surfaces
Surface A
Surface A refers to the front housing of a device which is visible when looking directly at the device but is not part of the back housing
Surface A also refers to the fingerprint sensor if it exists
Surface AA
Surface AA refers to the display of a device in addition to all camera lenses.
Surface B
Surface B refers to the sides and back of a device housing. This includes
- Housing sides, corners, and backs
- Other visible parts such as sim tray cosmetic area, logos, battery cover, side keys, USB port area, headset port area, audio mesh, microphone holes, screws that are visible, and other visible surfaces (antenna, stylus, and bezels.)
Surface C
Surface C refers to internal components that are connectors under covers
Cell Phone Grading Criteria
45 Points Inspection Criteria
All of the pre-owned devices we carry go through a lot of checks and tests to ensure our customers are getting what they’re supposed to get when they are buying from us. The following is a list of those individual checkpoints.
- IMEI Check
- Power Key
- Volume Up Key
- Volume Down Key
- home Button
- Mute Key
- Fingerprint Test
- Front Camera
- Flash Light
- Rear Camera
- First Microphone
- Second Microphone
- Tertiary Microphone
- Loud Speaker
- Ear Speaker
- Touch Screen
- Charging
- Headphones
- Headphones Volume Up
- Headphones Volume Down
- Headphones Media
- Vibrator
- Network Carrier
- Wifi
- Bluetooth
- Brightness
- Light Sensor
- Live Call
- Orientation
- Gyroscope
- Accelerometer
- Display Check: White Background
- display Check: Black Background
- Display Check: Blue Background
- Display Check: Green Background
- Display Check: Red Background
- Battery Percentage Check
- FMIP/FRP lock check
- Data Wipe
- Proximity Sensor
- Wireless Charging
- NFC
- USB check
- Touch ID
- Face ID
Pre-owned Grade A Devices
Pre-owned Grade B Devices
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