I recently purchased a pre-owned iPhone XR from Koodo. It seemed to work fine until yesterday when I can no longer make or receive calls. The phone call will connect but no audio/sound will go through and the call only lasts for 13 seconds before the phone automatically ends the call. I’ve tried to troubleshoot (i.e. power on/off, removing the SIM card) but I’m still experiencing the issue. Data and WIFI are working.
How do I fix this so I can continue making and receiving phone calls?