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Start with the least disruptive check for the symptom: verify the relevant setting or connection, restart the iPhone, and test another network or power source when possible. Save resets and app deletion for later, since they can remove saved settings or locally stored data. The paths below follow Apple Support guidance accessed October 7, 2026; labels and features can vary by iOS version, model, region, and carrier.
Why won’t my iPhone charge?
First check the power source and connections before assuming the iPhone needs repair. A loose or damaged cable, adapter, outlet, debris in the charging port, a temporary software state, or heat can interrupt charging.
- Try a different outlet, a computer, or another power accessory to isolate the source. Confirm the cable and adapter are firmly connected.
- Inspect the cable and USB power adapter for damage. Do not use damaged accessories.
- Check the charging port for visible debris and remove it carefully; do not force anything into the port.
- Restart the iPhone, connect it to power again, and allow it time to charge.
If charging pauses around 80 percent, check whether Optimized Battery Charging or, on iPhone 15 models and later, a Charge Limit is enabled. A warm battery can also cause iOS to limit charging above 80 percent until the phone cools. Apple says an iPhone automatically stops charging when full, so leaving it connected overnight is safe. If it still will not charge or power on, arrange service.
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Consider another compatible, undamaged cable or USB power adapter only after checking your existing setup. Confirm the connector and model compatibility before buying; an accessory is not the first troubleshooting step. Apple’s charging guidance covers additional checks.
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Why is my iPhone battery draining so fast?
Look for a specific cause before changing settings. Open Settings > Battery and review usage, app and system activity, suggestions, and Insights. The Daily Usage chart can show recent patterns, including usage over the prior seven days.
- Background activity, high screen brightness, frequent notifications, and weak or absent cellular coverage can increase battery use.
- When available, Wi-Fi generally uses less battery than a mobile network.
- Low Power Mode can reduce power use, but some features may be reduced or disabled.
Check Battery Health for a service message. Apple’s cited guidance uses Battery Health on iPhone 15 and later, and Battery Health & Charging on iPhone 14 and earlier. If the screen says Service, Apple advises considering battery replacement. Some newer battery features require iOS 26 or later and compatible hardware. See Apple’s battery-drain guidance.
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Why won’t my iPhone connect to Wi‑Fi?
- Open Settings, confirm Wi-Fi is on, and select the network. Make sure Airplane Mode is off.
- If the Wi-Fi control is grayed out, restart the iPhone and check again.
- Test whether other devices can connect to the same network. If they can, restart the router, check that the iPhone is within range, and try another supported frequency if available.
- Try a different Wi-Fi network. This helps distinguish a router-specific problem from one that follows the iPhone.
If no devices can get online, contact your internet service provider. Consider Reset Network Settings only after the simpler checks: it removes saved Wi-Fi networks and passwords, cellular settings, and VPN/APN settings. Apple’s Wi-Fi troubleshooting steps provide further guidance.
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Slow performance can come from the connection, low storage, Low Power Mode, temperature, battery condition, or touch-screen problems. First note whether the slowdown happens only in a particular app or mainly when the network is weak or the phone moves between cell towers.
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Check storage, power mode, and temperature
Go to Settings > General > iPhone Storage. Apple advises keeping at least 1 GB of available storage to avoid slow performance. Offloading an app frees its storage while keeping its documents and data; deleting an app removes it and its related data, so check what is stored locally before deleting.
Check whether Low Power Mode is on. If the iPhone is unusually hot or cold, move it to a moderate-temperature environment and allow it to return to normal operating conditions. Review Battery Health if performance remains poor.
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Separate an app problem from an iPhone problem
If one app freezes, crashes, or will not open, force-close and reopen it, restart the iPhone, then check for app updates in the App Store and iOS updates. Reinstalling is a later option: deleting an app can lose data stored within it. If an App Store app still fails, contact its developer. Apple’s slow-performance guidance and app troubleshooting steps explain these checks.
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What do I do if my iPhone is frozen or has a black screen?
On an iPhone with Face ID, perform a force restart: quickly press and release Volume Up, quickly press and release Volume Down, then hold the Side button until the Apple logo appears. Button sequences differ on iPhone 7 and earlier or Home button models, so identify the model and follow the matching instructions rather than using the Face ID sequence.
If the iPhone does not turn on, connect it to power and allow it to charge. If it remains unresponsive, seek service. See Apple’s instructions for a black screen or iPhone that will not turn on.
Why does my iPhone say SOS, No Service, or Searching?
- Turn Airplane Mode on, wait at least 15 seconds, then turn it off.
- Restart the iPhone and check the status again.
- Ask your carrier to confirm your account is active and check for network problems in your area.
If the carrier confirms there is no account or network issue and the iPhone still cannot connect, contact Apple service. SOS or SOS only is not the same as No Service: Apple’s Canada guidance says emergency calls may still be possible through other carriers’ networks in Australia, Canada, and the United States. That country-specific guidance should not be assumed to apply elsewhere. See Apple’s cellular-status guidance.
Why won’t my iPhone update?
- Confirm the iPhone model supports the update being offered.
- Check that there is enough free storage, a working internet connection, and sufficient power.
- If the download is slow, allow for the update’s size and your internet speed.
- If the phone cannot reach or verify the update server, try another network or update with a Mac or iTunes, as applicable.
- If an update file appears stuck, delete that downloaded file and download it again.
Apple’s update troubleshooting guide describes the steps and current compatibility checks.
Quick Recap
Who should you contact if the quick fixes do not work?
- App developer: one App Store app continues to fail after reopening, restarting, and updating.
- Router administrator or internet provider: multiple devices cannot connect or get online through the same network.
- Cellular carrier: SOS, No Service, or Searching persists and the carrier needs to check the account or local network.
- Apple service: charging, screen response, or connectivity still fails after the relevant checks, or the carrier has ruled out a cellular account or network cause.
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