Apps won't connect to the internet but could it be SIM

You can try Troubleshooting wifi and cellular issues

1. Troubleshooting Wi-Fi Issues

Turn Your Wi-Fi Off Then Back On

The first thing to do when your iPhone won’t connect to the internet is to quickly turn Wi-Fi off and back on. This gives your iPhone a second chance to connect to your Wi-Fi network, which could resolve a minor software problem.

Open Settings and tap Wi-Fi. Then, tap the switch next to Wi-Fi at the top of the menu. Wait a few seconds, then toggle Wi-Fi on again.

Forget The Wi-Fi Network On Your iPhone

Sometimes forgetting your Wi-Fi network on your iPhone and setting it up like new can fix connectivity issues. When you connect your iPhone to a Wi-Fi network for the first time, it saves information about that network and how to connect to it. If part of that connection process has changed, it could be the reason why your iPhone won’t connect to the internet, or why your iPhone says “No Internet Connection.”

Make sure to write down your Wi-Fi password before you complete this step! You’ll have to reenter it when you reconnect to the network.

Open Settings and tap Wi-Fi. Tap on the information button next to your Wi-Fi network, then tap Forget This Network.

Next, go back to Settings -> Wi-Fi and tap on your Wi-Fi network to reconnect to it.

Restart Your Router

Sometimes the internet isn’t working because of an issue with your Wi-Fi router, not your iPhone. You may need to restart your router.

First, unplug your router from the wall. Wait a few seconds and plug it back in. Your router will boot back up and start to reconnect. Be prepared, this might take some time!

Troubleshooting Cellular Data Issues

Turn Cellular Off And Back On

Turning Cellular Data off and back on can sometimes fix minor connectivity issues. Open Settings and tap Cellular. Then, turn off the switch next to Cellular Data. Wait a few seconds, then turn it on again.

Eject and Reinsert Your SIM Card

A SIM card is what connects your iPhone to your carrier’s wireless network. Sometimes ejecting the SIM card and reseating it can fix connectivity problems.

Your iPhone SIM card is located in a tray on the side of your iPhone. Check out our guide on ejecting SIM cards if you need help! After reinserting your SIM card, try connecting to the internet.

Final Steps

If your iPhone still won’t connect to the internet after following of the steps above, you may have to perform a deeper reset on your iPhone. Before you do, head to Settings -> General -> Software Update and make sure your iPhone is running the latest version of iOS. Tap Download and Install if a software update is available.

Apple regularly releases iOS updates to fix minor bugs and problems, one of which could be preventing your iPhone from connecting to the internet.

update to ios 14.4

Reset Network Settings

When you Reset Network Settings, all Wi-Fi, Bluetooth, Cellular, and VPN settings are restored to factory defaults. You’ll have to reconnect your Bluetooth devices and reenter your Wi-Fi passwords after completing this step.

Open Settings and tap General -> Reset -> Reset Network Settings. Then, tap Reset Network Settings when the confirmation pop-up appears. Your iPhone will shut down, perform the reset, then turn itself on again.

Repair And Support Options:

If none of software troubleshooting steps fixed the problem, it’s time to get in touch with a customer support representative at Apple, your wireless carrier, or your router manufacturer.

Yes....the factory reset would have rebooted the wifi settings ....we can try resetting network once more specifically for wifi and cellular . Also some times due to incomplete updation of device software can cause some problem for we you can try DFU.

DFU stands for Device Firmware Update, and it’s the deepest type of restore you can do on an iPhone.

You can google it that how you can put you iphone 8 in DFU also for this you need a pc running on mac os. And also backup your data before doing this

And then after DFU, try updating your software again.

(A Word Of warning ⚠️

When you DFU restore your iPhone, your computer erases and reloads every bit of code that controls the software and hardware on your iPhone. There’s the potential for something to go wrong.)

Or if you don't want to get into this then i will recommend you to contact apple support.

Hey! This might look little bit rubbish but can you try switching Date/Time settings to update automatically . I also don't know but i found this as a helpful answer on apple's site. Just give it a try .....( fingers crossed ).

And also please update me if this worked or not. I will be pleased to help you if this doesn't work.

I think you should contact to apple support and since there is no hardware damage, they might fix this for you (may be without charging single penny).

👍.

Also if i find something more about this problem then I'll definitely update you.

Happy to help you!😀