Why isn’t my iPhone 8 connecting to the network or able to make or receive calls?
My iPhone 8 is not connected to the network
[Re-Titled by Moderator]
iPhone 8, iOS 16
My iPhone 8 is not connected to the network
[Re-Titled by Moderator]
iPhone 8, iOS 16
festus ~ As your iPhone 8 could be 7½ years old, it's worth checking for a weak, aging battery which can cause such issues. So...
Does your iPhone 8 still have its original battery?
And what's the Maximum Capacity % here?...
Settings > Battery > Battery Health & Charging
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Check your iPhone settings
Go to Settings and turn on Airplane Mode, wait five seconds, then turn it off. Check Do Not Disturb. Go to Settings > Focus > Do Not Disturb and make sure it's turned off. Check for any blocked phone numbers.
If you can't make or receive calls on your iPhone - Apple Support

Can't send or receive message then try these steps first
If you can't send or receive messages on your iPhone, iPad, or ...

If you can’t connect to your carrier’s network …
… contact your carrier for troubleshooting assistance.
What Call? On an iPhone, you can make and receive various types of calls. Here are the different types:
It's important to note that the availability of certain call types may depend on your iPhone model, iOS version, and carrier.
Why isn’t my iPhone 8 connecting to the network or able to make or receive calls?