Cosmetic vs Functional Grading for Used Phones
Why a used-phone lot needs two grades, what each axis should test, and how mixing beauty with function hides the expensive failures.
Topic tag
“QC” — page 2
Page 2 of the PhoneBulk archive of guides tagged QC, sorted from newest to oldest.
Grade A, B, and C Phones in Wholesale Lots
What Grade A, B, and C usually mean in phone wholesale, why those letters are not a law, and how to accept or reject a letter without a written scale.
IMEI Checks for Bulk Phone Lots
What an IMEI and TAC identify, what GSMA Device Check can and cannot prove, and how to treat a flagged unit in a wholesale lot.
MDM Enrollment Checks for Used iPhones
How to check whether a used iPhone is under mobile device management, why a reset may not clear Automated Device Enrollment, and who can release it.
iPhone Parts and Service History for Bulk Buyers
How to read Genuine, Used, Unknown, and Unverified on iPhone, and why a working phone can still fail a wholesale parts check.
Battery Health for Wholesale Used Phones
How bulk buyers should read battery health, what Apple’s capacity and cycle notes actually say, and which battery claims belong in a used-phone quote.