No internet connection with 4G indication

ok , I just now found out it was becasue of VpN . turn it off if you use one

I have the same issues, my Iphone 11 shows 4G but there is not internet connected.

This happened for more than a month. I have done/ checked steps 1-5, and even changed the new sim card, but useless.

I went to China 2 weeks ago, my iphone has no connection to internet at all even i have subscribed roaming.

Now the internet only works when I connect to wife.

I did all the steps as you did too and it does not help at all.

I am getting sure that is the phone problem.

With my friends who also use the same network provider, and we are at the same place, they have very stable internet connection but my phone not.

After months of trying, I have these findings:

1. My daily routine is same everyday. I realise that the phone always lose its connection at the same location.
2. When I travel to other cities within the country (5 hours of journey), the connection will lose a few times on the highway.
3. I travelled to a few countries (Singapore, China, Malaysia, Istanbul and Portugal), with different network providers, the phone has the same issues.
4. The connection is stable only when it connects to WiFi.

Apple should review their Iphone product again,

Having 4G does not necessarily mean you have internet. If you're experiencing a lack of internet connection despite seeing the 4G indication on your iPhone, there could be a few potential explanations for this issue:

1. Network congestion: Even though you have a 4G signal, there might be congestion or high traffic on the network, which can lead to slow or no internet connectivity. This can occur in areas with many users or during peak usage times. In such cases, the signal strength may be adequate, but the actual data transfer could be limited.
2. Data plan or account issue: Verify that your mobile data plan is active and that you have not exceeded any usage limits or restrictions imposed by your carrier. Additionally, check if there are any outstanding payments or account-related issues that could be affecting your internet access.
3. Incorrect APN settings: Access Point Name (APN) settings are necessary for your device to establish a connection with your mobile network provider. If the APN settings are incorrect or misconfigured, it can result in a lack of internet connectivity. Double-check your APN settings or contact your carrier to confirm the correct configuration.
4. Network settings: Occasionally, network settings on your iPhone can disrupt internet connectivity. Try resetting your network settings by going to Settings > General > Transfer & Reset > Reset > Reset Network Settings. Keep in mind that this will remove saved Wi-Fi passwords and other network-related preferences, so you may need to reconfigure them afterward.
5. SIM card problem: In rare cases, there could be a problem with your SIM card. Restart your device and, if possible, try using your SIM card in another compatible device to determine if the issue persists. If the problem continues, contact your mobile carrier or visit an authorized service center for further assistance.

If none of these steps resolve the issue, it's advisable to reach out to your mobile carrier's customer support to troubleshoot the problem or seek additional guidance specific to Carrier's network.

I have same problem with Iphone 8+.

I just reset all settings for my iPhone 11.

Settings—> General—>Transfer or Reset IPhone—> Reset—> Reset all settings

it works, but the stability of 4G is less than before.