Weight, pin quality, print, and certification marks that mean something. How to spot a counterfeit charger before it damages a phone you just paid for.
Liquid contact indicators, corrosion signs, and the delayed failures that appear months later. How to check a used phone for water exposure before you pay.
A copy screen saves money once and costs more at resale. What breaks with aftermarket panels, how buyers detect them, and when a copy part is acceptable.
A decision framework for aging phones: what each repair costs against what the phone is worth, which faults are worth fixing, and when parts run out entirely.