This is a recent issue that started about a week ago. This happens most but not all of the time.
What is the make and model of your phone? What is your location? (City/town?)
can you do try reseat the SIM card
1.power off your device
2.take out the SIM card,
3.wipe it clean,
4.put it back and power on,
5.toggling airplane mode off/on,
it happened sometime you know, A normal reboot without reset, didn't work. At least try it,
only work after reseating the SIM card.
can you try it selecting the network to "3G ONLY"
for iPhone visit HERE
for android visit HERE ,
what is mean for Rebooting the phone means to turn off your phone and turn it back on.
@SMacK1 in addition to @darlicious's question about your phone: when you say "listening", do you mean listening to the other person talking while on phone calls, or do you mean when listening to music/videos/etc? Are you "listening" on the phone's speaker(s), or through wired headphones, or bluetooth headset/speaker? We need more details here to even start trying to help.
EDIT: and most important question/suggestion: have you tried restarting your phone?
Sorry for the delay in responding. My cell phone is a Motorola Moto G Fast. I live in Waterloo, Ontario.
Thanks for your reply. My husband has the same phone and he is having the same problem. We both cleaned and re-installed our SIM cards, and this seemed to have solved the problem until a few hours later when it started happening again.
Thank you for your detailed solution. My husband has the same phone as I do and is having the same problem, but not quite as bad as my phone. We both removed, cleaned and replaced our SIM cards, which temporarily improved phone performance, but later in the day, the problem returned.
Thank you for your message.
When talking on the phone I typically use the phone's speaker (hands free). I have to speak closely and directly into the phone's microphone for the person on the other end to hear me clearly. (By "listening" I meant listening to a caller on the other end using the phone's speaker. There is no problem hearing music or YouTube videos.) There are times when the other caller is talking and suddenly that person's voice cuts out, then in, then out... Frustrating.
Re-starting the phone does not help.
Thanks very much for your help.
@SMacK1 is it possible you try it on other voice communication app like whatscapp voice call or Facebook voice calls?
I understand you said YouTube does not have the problem but YouTube does not use the speaker. Try to see if you can arrange some app voice calling to confirm it it is phone issue or if it is PM.