Start with the symptom, try the least disruptive checks first, and escalate to the person who can address the failing part: an app developer, internet provider, mobile carrier, or Apple service. These steps reflect Apple Support guidance accessed October 7, 2026; menus and features can vary by iPhone model, iOS version, region, and carrier.
What to try before troubleshooting a specific problem
- Check the setting, cable, network, or app tied to the symptom before changing broader system settings.
- Restart the iPhone when a problem may be temporary. For app issues, check for updates before deleting anything.
- Test another power source or network when possible. If the problem disappears, that helps identify whether the cause is the iPhone or the accessory or network.
- Keep data risks in mind: deleting an app can remove data stored inside it, while resetting network settings removes saved Wi‑Fi networks and passwords, cellular settings, and VPN/APN settings.
Why won’t my iPhone charge?
First check the charging setup rather than buying a replacement accessory. Try a different wall outlet, computer, or power accessory; make sure the cable and USB adapter are securely connected; and look for damage. Do not use a damaged cable or adapter. Check the iPhone port for visible debris and allow the device some time connected to power.
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If the iPhone stops charging around 80 percent, charging may be paused because the battery is too warm. Apple says software can limit charging above 80 percent in that situation. Charging may also stop at a set limit or be delayed by Optimized Battery Charging. On iPhone 15 models and later, check for a Charge Limit; the location and labels of battery options can vary by model and iOS version. Apple notes that iPhone automatically stops charging when the battery is full, so leaving it connected overnight is safe.
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If the phone still will not charge or turn on after these checks, arrange service. If you later need a cable or USB power adapter, confirm it is compatible with your iPhone and check your existing setup first.
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Apple Support: If your iPhone or iPod touch won’t charge
Why is my iPhone battery draining so fast?
Open Settings > Battery and review usage details, app and system activity, suggestions, and Insights. Apple’s Daily Usage chart can show usage over the prior seven days. Look for activity that matches when the battery started draining faster, such as background activity or heavy screen use.
- High screen brightness and frequent notifications can increase power use.
- Low or absent mobile coverage can contribute to battery use. When available, Wi‑Fi uses less battery than mobile networks.
- Low Power Mode can reduce power use, but some features may be reduced or disabled while it is on.
Review Battery Health if the drain is persistent. Apple’s cited guidance labels the menu Battery Health on iPhone 15 and later, and Battery Health & Charging on iPhone 14 and earlier. If it says Service, Apple advises considering battery replacement. Some newer Battery features require iOS 26 or later and compatible hardware.
Apple Support: If the battery in your iPhone or iPad drains too quickly
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Why won’t my iPhone connect to Wi‑Fi?
Confirm Wi‑Fi is on, select the intended network, and check that Airplane Mode is off. If the Wi‑Fi control is grayed out, restart the iPhone.
Next, check whether other devices can connect to the same network. If they cannot get online either, restart or update the router and contact your internet provider if the connection remains down. If other devices work, check the iPhone’s range from the router and try another supported frequency or another Wi‑Fi network. A successful connection elsewhere points toward the original router or network rather than a general iPhone Wi‑Fi failure.
Reset Network Settings only after simpler checks. This removes saved Wi‑Fi networks and passwords, cellular settings, and VPN/APN settings.
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Why is my iPhone so slow?
Check whether the slowdown happens only in apps or websites that depend on a weak connection, or while the iPhone moves between cell towers. Then review Settings > General > iPhone Storage. Apple advises keeping at least 1 GB of available storage to avoid slowdowns.
- Check whether Low Power Mode is enabled.
- If the phone is very hot or cold, move it to a moderate-temperature environment.
- Review Battery Health for signs that battery condition may affect performance.
- If touch input is inaccurate or remains unresponsive after restarting, the issue may need service rather than a storage or network fix.
In iPhone Storage, Offload and Delete are different choices: offloading frees app storage while retaining its documents and data, while deleting removes the app and its related data. Consider the app’s local data before deleting it.
Apple Support: If your iPhone or iPad is running slow
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- Close the affected app, then open it again.
- Restart the iPhone.
- Check for an update to the app in the App Store and install any available iOS update.
- If the issue continues, consider deleting and downloading the app again. App data stored locally may be lost, so check whether the app has a way to preserve or sync it first.
- If the problem persists in an App Store app, contact the app’s developer.
Apple Support: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
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Why does my iPhone say SOS, No Service, or Searching?
Turn Airplane Mode on, wait at least 15 seconds, turn it off, and restart the iPhone. If service does not return, ask your carrier to check account status and network conditions. If the carrier confirms there is no account or network issue and hardware may be involved, contact Apple service.
SOS and No Service are not identical. Apple’s Canada guidance says SOS may still allow emergency calls through other carriers’ networks in Australia, Canada, and the United States. Do not assume that emergency-call behavior applies in other countries; check local guidance.
Apple Support: If you see SOS, No Service or Searching on your iPhone or iPad
What do I do if my iPhone is frozen, has a black screen, or will not turn on?
For an iPhone with Face ID, quickly press and release Volume Up, quickly press and release Volume Down, then press and 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 before following a force-restart sequence.
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If the iPhone does not turn on, connect it to power and give it time to charge. If it remains unresponsive, seek service.
Apple Support: If your iPhone won’t turn on or the screen is black
Why won’t my iPhone update?
Check that the iPhone model supports the software being offered, that there is enough free storage, and that the phone has internet access and power. Download time can depend on the update size and connection speed.
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If the iPhone cannot reach or verify the update server, try another network or update using a Mac or iTunes, as applicable. If an update file is stuck, Apple’s guidance describes deleting the file and downloading it again. Check Apple’s current compatibility and release information for the version offered to your device.
Apple Support: If your iPhone or iPad won’t update
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Who should you contact if the problem persists?
- One app still fails: contact its developer after trying the app and iOS updates.
- Multiple devices cannot use the same Wi‑Fi: contact the internet provider or router administrator.
- Cellular service remains unavailable: ask the carrier to check the account and network.
- The iPhone itself remains unable to charge, connect, respond, or register touch input: arrange Apple service.
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