My iPhone 8 device has sim and internet connections but cannot make calls

r1a2j wrote: "other technician......."

Apple says: "Repairs performed by untrained individuals using nongenuine parts might affect the safety of the device or might cause improper function." Source:

About genuine iPhone batteries - Apple Support

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r1a2j wrote: "No it was changed some days ago???..."

Was it changed by an Apple Store or other qualified technician?...

Repair Provider Verification - Official Apple Support

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r1a2j wrote:

My iphone 8 device has sim connection and internet connection but it doesn’t work incoming call and outgoing call what could be the reason??

Report the issue to your phone carrier.

r1a2j ~ Does your iPhone 8 still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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