When you find that your iPhone won't connect to the internet, whether it's Wi-Fi or cellular data, and is suddenly not working, it can be incredibly frustrating. Not being able to browse the web, send messages, or use apps almost makes your phone feel "half-paralyzed". In fact, most iPhone network connection issues aren't caused by hardware damage but by incorrect settings, system glitches, network environment problems, or issues with your carrier.
This article will guide you step by step through the process of diagnosing and fixing the problem of your iPhone internet not working.

Why is my phone suddenly not connecting to the internet? Here are some possible reasons:
Here are 11 solutions to a no internet connection on an iPhone. Try the following methods one by one until your iPhone's internet connection is restored.
Sometimes, the "no network connection" issue on an iPhone is caused by a temporary glitch in the network module, and simply toggling the settings can refresh the connection. This is the fastest and most worthwhile method to try first.
Go to "Settings", turn off both "Wi-Fi" and "Cellular Data", wait a few seconds, then turn them back on and reconnect to the network.

Toggling Airplane Mode can help reset your iPhone's connection to both cellular networks and Wi-Fi, making it a useful step if you're wondering why your iPhone's internet isn't working.
To do this, swipe down from the top right corner to open "Control Center", then tap the "Airplane Mode" icon to enable it. Wait a few seconds to let all connections reset, then tap the icon again to turn it off. This quick action can often fix temporary network issues and restore your internet connection.

If the issue is with a specific Wi-Fi network's configuration, simply reconnecting to the network often resolves the problem. Here is how to fix iPhone won't connect to Wi-Fi:
Step 1. Go to "Settings" > "Wi-Fi".
Step 2. Tap the "i" icon next to the connected network.
Step 3. Select "Forget This Network".
Step 4. Try rescanning for Wi-Fi networks and reconnect by entering the password again.

Certain VPN or proxy services may block network requests, causing the iPhone to show as connected but unable to access the internet.
To fix the issue of iPhone not connecting to the internet on cellular, go to "Settings" > "VPN & Device Management", turn off or remove any VPN configurations, and then test the network connection again.

Sometimes, a quick restart can resolve a variety of issues, including the problem of iPhone internet not working.
For iPhone X, 11, 12, 13, or newer:
For iPhone 6, 7, 8, or SE (2nd or 3rd generation):
For iPhone SE (1st generation), 5, or earlier:

If other devices in your home can't connect to the internet either, the issue is likely with the router or the broadband itself. Turn off the router, wait for 1–2 minutes, then restart it. Once the network has fully restored, try reconnecting your iPhone.

If your iPhone won't connect to the internet on cellular, a poor SIM card connection or recognition issue could be a common cause. Turn off your phone, remove the SIM card, clean it gently, then reinsert it and power the device back on to test the connection.

Older versions of iOS may have known network bugs that can cause your iPhone to not connect to the internet. Apple typically addresses these issues in updates.
Go to "Settings" > "General" > "Software Update" to ensure your iPhone is running the latest stable version of iOS.

If multiple networks are not working properly, it could be due to a corrupted network configuration profile. Resetting the network settings can resolve this issue in one go. Note that this action will erase Wi-Fi passwords and VPN settings, but it will not delete your data.
Here is how to fix iPhone won't connect to internet after an update by resetting the network settings:
Step 1. Open "Settings" > "General".
Step 2. Go to "Transfer or Reset iPhone".
Step 3. Tap "Reset" > "Reset Network Settings".
Step 4. Enter your lock screen password and confirm.

After the reset, restart your iPhone and reconnect to the network.
If none of the above methods work, it's likely an issue at the iOS system level, such as corrupted system files or a failed update. These types of problems generally can't be fixed through settings alone. In this case, you'll need a professional iPhone system repair tool. iOS System Recovery is one such tool. It can fix system issues, including iPhone won't connect to the internet, no signal, and Wi-Fi being grayed out, without losing any data.
Main features of iOS System Recovery:
Here is how to fix iPhone won't connect to the internet without data loss:
01Install the iOS System Recovery tool on your computer. Once installed, launch the program and select "iOS System Recovery".
02Connect your iPhone to your computer and trust the connection. Click "Start" and follow the on-screen instructions to enter recovery mode.

03Select "Standard Mode" and click "Confirm". The tool will begin downloading the required firmware for your iPhone.

04After the firmware is downloaded, click "Repair" to initiate the process. The software will automatically resolve issues, including the iPhone internet not working problems.

If your iPhone still can't connect to the internet, especially if cellular data is completely unavailable, the issue may be due to:
In this case, contacting your carrier or visiting an Apple Authorized Service Provider would be the safest option.
When you encounter the issue of iPhone not connecting to the internet, most cases can be resolved using the methods above. If regular settings and network troubleshooting don't work, system malfunctions are often the root cause. Without losing any data, iOS System Recovery is an efficient and safe choice, especially for iPhone users who frequently experience network issues.
If you encounter any problems during operation, or if you have any other better suggestions, please leave a message to tell us.
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