Step one, check the Serial Number.
The serial number is the unique identification for each iPhone
We will open the Settings to see the serial number
Then input after-sales system query
The system will tell me the specific information of the ID card within 1 minute.
We know the official iPhone situation first hand.
There are some that we need to look up manually.
For example, the case is the record of the maintenance in the aftermarket.
That is, GSX system queries.
These records will determine the iPhone’s warranty value.
Step two, identify the identity
Check all iPhone accessories against the iPhone serial number
Most iPhones have QR codes on their internal parts
All QR codes correspond uniquely to this serial number
If there is a QR code does not correspond to the existence of non-factory parts
There will be a MEID number on the back of the phone and the SIM card slot
Unique pairing with system MEID
Check the large parts and check the small parts
The iPhone has dozens of screws
For most models, the specific position screws are unique
A small part of general use, screw installation error will exist hidden dangers
Smaller ones will have small bugs, and larger ones will crash through the screen motherboard
Of course, fewer screws and protective patches are also a lot
As shown in the figure above, the battery wiring position is missing the cover plate and two screws
This is a very obvious missing part that can be compared to another iPhone
Such deficiencies often reflect poor maintenance
There is a great risk of hidden faults
The review was followed by a careful inspection of key components
You need a lot of specialized equipment to check the performance
There are simple appearance inspection, the existence of tool scratches and damage are man-made dismantlement of the performance Oh
The presence of third-party marks on key components, such as motherboards and screens, is the scene of a very serious crash
Of course, the phenomenon of water fall injury is also very obvious can be seen.
The above circumstances exist, direct rejection.
If all goes well, let’s move on to the final performance test
Appearance of scars
Light sensing function
All functional tests were normal
And then there’s an internal test report
The iPhone meets the above requirements
Users will be contacted and confirmed
Deal with next steps of repair, warranty, recycling, etc.