Guides from the bench
How to check an iPhone's real battery cycle count (and spot a reset one)
Where the cycle count actually lives, why Settings can lie about it, and the signs a counter has been reset or a gauge reflashed.
How to tell if an iPhone battery has already been replaced
The service history, gauge records and part-pairing signals that reveal a swapped battery, even when the phone shows no warning.
Reading iPhone kernel panic logs: what the sensor tokens actually mean
TG0B, Prs0, Mic1, Mic2 and the rest — how to turn a panic log into the specific flex cable or IC that failed.
iPhone won't charge: a diagnosis order that does not waste parts
Tristar/Hydra, the PMIC, the charge port and the battery — how to tell which one it is before you order anything.
Checking a used iPhone before you buy it: a 5-minute bench routine
A repeatable order of checks for traders and shops — identity, parts, battery, history — and what proof to give the buyer.
iPhone diagnostic software for Windows: what can actually be read over USB
What an iPhone will and will not tell a Windows PC over a cable — battery gauge records, panic logs, part pairing — and what no software can read.
Reading real iPhone battery health on Windows: beyond the 3uTools number
Why two tools can print two different battery health figures for the same phone, what the gauge actually stores, and how to get a number you can defend.
Face ID stopped working after a screen replacement: what actually broke
The TrueDepth pairing, the flex most often torn, and how to tell a software fault from a dead dot projector before quoting the customer.
How to check an iPhone for water damage — beyond the red sticker
The liquid contact indicators, the corrosion timeline, and the electrical signatures moisture leaves that a visual check misses.
Read it from the phone instead of guessing
PhoneVitals pulls every number in this article off the device itself over USB — the gauge records, the panic logs, the pairing checks — and prints them in a report your customer can verify by QR code. The first scan on your computer is free.
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