Apple iPhone 8 cannot make calls or send messages

4.7-inch widescreen LCD with IPS technology, at 1334-by-750 at 326 ppi. That matters more than it sounds — a procedure written for a different size in the same line puts controls in different places, and gestures that depend on reach behave differently.

Lightning. A USB-C cable will not fit at all, which is the usual explanation when a charger that works on a newer iPhone in the same household does nothing here. Lightning cables also fail internally at the strain point, so a cable swap is the first test for slow or intermittent charging.

Touch ID — a fingerprint reader. General iPhone advice about lighting, angles and face coverings does not apply. What affects this model is moisture and the skin itself changing, and enrolling the same finger a second time helps more than repeated attempts against one reference.

The A11 Bionic. This determines how long the model keeps getting iOS updates, and it is the reason an app can drop support for this iPhone while running fine on a newer one — a support-window matter rather than a fault to troubleshoot.

64GB/128GB/256GB. The 64GB tier is the single most common cause of storage trouble on this model, and it is why an update can refuse with what looks like enough space free — installation needs room to unpack and stage as well as to store.

No. It is rated IP67, a lower rating than the IP68 models later in this line — splashes and brief incidental exposure rather than submersion. The rating also degrades with age and drops, and liquid damage is not covered.

No. This model uses a physical nano-SIM only, so any instruction about transferring or reissuing an eSIM profile does not apply to it, and changing carriers means physically swapping the SIM.

Bluetooth 5.0. Version affects range, reconnection behaviour and which accessory features are available. A newer accessory paired here operates at this version's capabilities rather than failing, which is regularly mistaken for a pairing fault when the accessory simply cannot do everything it does on a newer phone.

625 nits maximum brightness (typical). Brightness is among the largest single consumers of battery, so outdoor use at full brightness costs real runtime — and poor outdoor readability on this model is usually this figure rather than a display fault.

Apple rates it at up to 50% charge in 30 minutes. That assumes an adequate adapter — a low-output adapter, a laptop USB port or an old car charger falls well short, and that is the usual reason a phone charges far more slowly than the specification suggests.

4K video recording at 24, 30 or 60 fps. Resolution and frame rate are the dominant factor in how fast video fills storage, and they push the phone hardest thermally — sustained high-frame-rate recording is the most common reason a camera stops mid-take.

Not meaningfully. This model uses an LCD panel, which backlights the whole screen regardless of what is displayed. Dark mode only saves real power on the OLED iPhones, where black pixels are switched off entirely.

Check three things: call forwarding, the block list, and any silence-unknown-callers setting. All three produce exactly this, all three leave the phone looking perfectly healthy, and all three are easy to leave switched on without knowing.

That rules out service, the account and the phone — all of which would affect everyone. What remains is a block list entry, that contact's stored number format, or the messaging transport being used for them specifically.

Send the same message as a plain SMS if the app allows it. Modern messaging silently chooses between RCS, an internet service and SMS, and success as plain SMS localises the fault to the internet transport rather than the network. Also check that their number is stored in full international format.

Turn Wi-Fi off and retry. Wi-Fi calling prefers Wi-Fi even when the Wi-Fi is worse than the cellular signal available, so a poor home network can produce worse calls than no Wi-Fi at all. One test identifies it.

That usually means the phone found a network and was refused by it, which points at the account or the SIM rather than the radio. Check the account status with the carrier first — a suspended line and a failed radio look identical from the status bar.

Check for an active focus mode and its allowed-callers list. Focus and bedtime modes silence calls deliberately and on a schedule, and nothing about the network or the call itself is involved.

Check call forwarding first — it is commonly enabled while travelling and left on afterwards, and the phone gives no indication. Then check that the network selection has been returned to automatic rather than left on a manual foreign network.

That points at the internet messaging transport rather than SMS. The two use completely different paths, and a transport that works on one connection and not the other is describing the network rather than the phone or the recipient.

That is a microphone problem rather than a calling one — and the first thing to check is whether a Bluetooth accessory is connected somewhere, because it takes the call's microphone with it. Record a voice note to test the microphone alone.

No. It is scoped to A1863/A1905/A1906. Current Apple iPhone family; camera controls, modem, connector and iOS features vary by exact hardware/region identifier.

Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.

A reset can erase accounts, networks, maps, schedules or preferences without distinguishing calls, messages. The ordered checks preserve that evidence.

Use another reliable path for urgent or emergency communication.