Hi ​@Gfawce, 

Three rings before voicemail is usually related to the call forwarding/voicemail settings, rather than a fault with your iPhone itself.

You can try the following:

• Open Settings > Apps > Phone > Call Forwarding and check that your settings are correct.
• Make sure Focus / Do Not Disturb is switched off.
• Check that Silence Unknown Callers is disabled if the issue mainly affects numbers that aren't saved in your contacts.
• Restart your iPhone to refresh the network connection.
• If you're using 5G, try switching to 4G/LTE temporarily and test an incoming call again.

If calls consistently go to voicemail after only three rings, despite these checks, please contact us via Live Chat so we can check the voicemail and call-forwarding settings on your account and investigate this further.

Owethu