How to properly prepare before repairing your iPhone yourself

First, rule out the simple stuff

Before even thinking about opening the iPhone, Apple recommends a series of simple checks that resolve a good number of issues: making sure a screen protector, case, glove, or stylus isn't causing interference, cleaning the display with a soft, slightly damp, lint-free cloth, plugging the iPhone into a power adapter with a compatible cable, then restarting the device (or force-restarting it if it's unresponsive). Making sure the software is up to date is also part of this first step, before any deeper troubleshooting.

Before you open the device: the checklist not to skip

If a repair is genuinely needed, Apple is explicit about the steps to always follow before starting: back up the iPhone, fully discharge the battery, disconnect all cables, remove cases, covers, and any external battery packs, turn off the device, then clear and clean your workspace. Wearing an ESD (electrostatic discharge) wrist strap connected to a properly grounded mat is also recommended — static discharge can damage electronic components even without immediately visible damage.

Battery: a risk to take seriously

Apple's warning is unambiguous: "Improper battery replacement, improper handling of parts, failure to discharge the battery before repair, or failure to follow the provided instructions could cause battery overheating, swelling, venting, leaking, or a battery thermal event." These events could result in fire, injury, or worse. Warning signs to watch for: smoke, sparks, a battery pouch that suddenly puffs out, or hissing/popping sounds. The rules are clear: never puncture, strike, or crush a lithium-ion battery, never use tools that conduct electricity nearby, and always fully discharge it before any repair.

Screen and broken glass: how to handle it safely

The display and some iPhone back covers are made of glass, which can break if the phone is dropped, takes a substantial impact, or is crushed or bent. Apple's warning: never attempt to remove chipped or cracked glass shards without proper protection (gloves, eyewear). If a sanding procedure is needed when replacing a back cover, it should never be performed close to your face or body — and insufficient sanding will keep the new protective cover from adhering properly, or cause it to come loose prematurely.

Want to go further?

These general precautions apply to any work on an iPhone, but each model has its own specific steps (screws, tools, exploded views). The full repair manual, with detailed part-by-part procedures, is available on Apple's support site — the best resource if you genuinely intend to open the device yourself rather than going through an authorized repair provider.