S21 5G calls going silent/cutting in and out

[Lykke]

I purchased an S21 5G through Samsung and got it shipped the day it came out. Ever since I got it I've been having issues during calls.  I'll be on a call with someone and then I'll stop hearing them or they'll stop hearing me and you hear them saying "hello???". 

My provider is Tmobile and they say there's no issue on their side and refused to do anything since I bought it through Samsung directly. I sent it to Samsung and they did a full inspection and said there's nothing wrong....

So far I've done:

downgraded from 5G to LTE and lower /installed new sim/reset networks/restarted in safe mode/ factory reset/ reset phone/ disconnected from wifi calling

What can I do? Any advice or anyone going through the same issues?

[MsFreddie]

Same issue! Only had the phone a week. Smh

[TheYarder]

Same! I've only had this phone for a week.

[SquidTech]

I'm having the same issue.  When the call cuts out, the caller can hear me, but I can't hear them.  It lasts for a short time and then comes back.  Because other apps are working fine, I believe it to be the nascent "Phone" app.

[Stephanie Nikki · Accepted solution]

There are some troubleshooting steps you can try.

1.  Make sure all apps and the software is up-to-date, and restart the phone.

2. Turn off your device and remove the SIM card. Restart your phone without the SIM card inserted. Wait for two minutes, and turn off the terminal. Insert the SIM card, and check if the problem is gone. If possible, insert a SIM card from a different carrier and check if the issue persists. If it does, this could indicate your hardware is faulty. You may want to take your phone to an authorized repair center and have it repaired.

3. Use Wi-Fi calling. Go to Wi-Fi Settings, select Advanced, and then toggle on Wi-Fi Calling to enable this feature. Some phone models may sport this option under SIM card settings.

4. Test the phone in Safe Mode. https://www.samsung.com/us/support/answer/ANS00062983/ 

If none of these methods worked, contact your carrier. It is always recommended to speak with your carrier regarding issues using their services, including making and receiving calls, sending and receiving text messages, and mobile data.