No sound on voice calls

[Lorrimj]

Got a new iPhone 14 from O2 shop last week all working perfectly until last Friday pm then lost all sound when making & receiving voice calls. Can make & receive calls ok on using WhatsApp audio. Had online diagnostics test today advised device is working correctly - went back to O2 shop checked my account all ok said problem down to latest apple upgrade to iOS 17.1.2. Anyone else have this problem?

[MI5]

@Lorrimj 

That's not something that's widely reported so I suspect it's something said to get rid of you.

Try a soft reset of the device.

Quickly press volume up then volume down then hold the power button until you see the Apple logo on screen.

[Lorrimj]

Did all this with on line agent - didn’t work still got problem

[madasaf1sh]

@Lorrimj 

Definitely not one of the bugs reported which are 

The current list of iOS 17.1.2 problems includes rapid battery drain, Bluetooth issues, Wi-Fi problems, Exchange issues, and problems with first and third-party apps.

So it could be a problem with the dialer software, and it might be worth if you can trying the sim in a different phone, as the other option is to do a factory reset..