Dropped calls

P562 Said:

"Dropped calls: No security software and I live in the city. my phone is 2 1/2 years old. It’s an iPhone 8. Thanks for the suggestion"

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Troubleshooting Dropping Calls:

A. Install a Cellular Update:

It might be prompting you for a cellular update to install. So, go here for that. Update your carrier settings manually on your iPhone or iPad - Apple Support

Also...

B. "No Service":

Is "No Service" shown on the top-left corner of your screen? If so, go here to fix that: If you See No Service or Searching on your iPhone or iPad - Apple Support

No Success?...

C. Whom to Contact:

Contact your Carrier, as they are the one who provide you with the service of Cellular and Voicemail.

P562 Said:

"Dropped calls: Why does my phone drop calls"

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Troubleshooting Dropped Calls:

A. Signal Strength:

How strong of signal do you have? If in a rural area, then it may be dropping the calls.

B. Security Software:

Do you have any Security Software installed? If so, it may be blocking it out. So, uninstall it, perform as instructed by the Developer.