Apple iPhone 8 troubleshooting

Published specification

What is true of this model and changes how you fix it

These are the properties that decide which procedure applies. Each is read from the manufacturer’s own published figures for this model, not carried over from a sibling that shares its retail name.

Display

4.7-inch widescreen LCD with IPS technology, 1334-by-750 at 326 ppi. Control positions, reachability and how much fits on screen all change with size, so a procedure written for another model in this line will not map one-to-one onto this one.

Chip

A11 Bionic. The chip generation governs how long this model keeps receiving iOS updates, and it is the underlying reason an app can stop working here while running normally on a newer iPhone — a support-window matter rather than a fault.

Connector

Lightning. Lightning cables and adapters are not interchangeable with the USB-C iPhones and a USB-C cable will not fit at all. Lightning cables also fail internally at the strain point near either connector, which is why a cable swap is the first test for slow or intermittent charging.

Biometric

Touch ID — a fingerprint reader, not face recognition. Advice about lighting, angles and face coverings does not apply here. What affects this model is moisture and the skin itself changing, and enrolling the same finger twice improves reliability more than repeated attempts against a single reference.

Camera

12MP Wide camera. A 12-megapixel main sensor produces much smaller files than the 48-megapixel iPhones, so a storage complaint on this model is less likely to be photos than it would be on a newer one.

Storage options

Sold in 64GB/128GB/256GB. The 64GB entry tier is the single most common cause of storage trouble on this model — a current iOS install plus a photo library leaves very little margin, and an update needs room to unpack and stage as well as to store, so it can refuse with what looks like adequate free space.

Wi-Fi

Apple does not publish a Wi-Fi generation figure for this model in its current tech specs. Treat any Wi-Fi standard claim about it as unverified, and diagnose by comparison against another device on the same network instead.

Bluetooth

Bluetooth 5.0. Version differences affect range, reconnection behaviour and which accessory features are available — a newer accessory paired to an older Bluetooth version simply operates at the older one's capabilities rather than failing, which is often mistaken for a pairing fault.

Screen brightness

625 nits maximum brightness (typical). Brightness is one of the largest single consumers of battery on any phone, so a model rated at a higher figure will spend more when it is actually driven to that level — and outdoor readability complaints are usually this specification rather than a display fault.

Water resistance

Rated IP67, a lower rating than the IP68 models later in this line. It covers splashes and brief incidental exposure rather than submersion, it degrades with age and drops, and liquid damage is not covered by warranty.

SIM

Physical nano-SIM only — this model has no eSIM at all. Any instruction about transferring or reissuing an eSIM profile simply does not apply, and changing carriers means physically swapping the SIM.

Wireless charging

No MagSafe magnet array on this model. Where wireless charging is supported it relies on alignment alone, which makes placement fussier than on the MagSafe iPhones and makes a thick case far more likely to defeat it.

Fast charging

Apple rates it at up to 50% charge in 30 minutes. That figure assumes an adequate adapter — a low-output adapter, a computer USB port or an old car charger will fall well short of it, which is the usual explanation for a phone that charges far more slowly than the specification suggests.

Video recording

4K video recording at 24, 30 or 60 fps. Frame rate and resolution are the dominant factor in how quickly video fills storage, and they are also what pushes the phone hardest thermally — sustained high-frame-rate recording is the most common cause of a camera that stops mid-take.

Weight

5.22 ounces (148 grams). Worth knowing where a mount is involved: the heavier models in this line stress adhesive mounts and magnetic car holders considerably more than the lighter ones.

Panel type

An LCD panel rather than OLED. Dark mode saves no meaningful power here — the backlight illuminates the whole panel regardless of content — and the per-pixel dimming and true blacks described for OLED iPhones do not apply.

Apple's own specification

Apple publishes the full technical specification for this model at support.apple.com/en-us/111976. Where any figure above matters to a decision, that page is the authority and this one is not.

Where these figures were read. support.apple.com/en-us/111976 (iPhone 8 — Tech Specs), read 2026-08-28

Manufacturer support for this product line. Apple Support — Apple product support. Official Apple model, operating-system, repair, connection and settings guidance.