Check material / important components
Major IC, Memory IC, Screen type, Rechargeable battery, Memory card slot (if exist), Mini USB slot, AC/DC adaptor, Speaker. Specify the type, brand, item No for each item.
Faultless of assembly
Items case assembly
Inscriptions, trade mark (logo) were printed clearly, correctly
Buttons on a product are reliable and are correctly assembled, capable to work smoothly without sticking
All slots and jacks
Installation of the display module
High quality of assembling
Quality of USB slot
Protective transparent film on the display
Insulation of cables
Check product inside
Confirming the assembly quality, S2 the typical size.
General system information
Dead pixel check.