Can't make calls?

[mattb]

At least once a week when I try to make a phone call (yes phones do make calls) it won't connect. I have to restart the phone (S24 Ultra) and then it's ok. Anyone else had this problem? 

[Star_girl]

I don't have this problem but it looks like a software or network problem.
Try to wipe cache partition, if it doesn't work, try factory reset but make sure you back up all the data on your phone, although factory reset should not affect your data, it's better to be safe. But before doing what I said, please log a feedback on the Members app and ask the Samsung staff what to do. Access the 'support' icon at the bottom right corner of your display for this.

[mattb]

I've just wiped the cache partition so I'll see how things go now. Cheers.

[Star_girl]

I only had this problem once when I unboxed my S20U for some reason the microphone was not working and factory reset fixed the issue.

[mattb]

This problem is getting worse now, any ideas as how to stop it from happening? I need to make quick urgent calls and I haven't got the time to keep restarting the phone every time. Someone must know how to fix this. Cheers in advance.

[Afbal]

My S24 Ultra fails on every other call. I just hear silence. If I end the call and try again it often works. Exactly the same thing happens on VoIP calls as well recently.

Also my Internet connection keeps going dead (browser shows offline for web sites) on WiFi and I have to restart WiFi on the phone to fix it. For some reason, I can still connect to the router and local network from the phone and every other device on the network has no problems accessing the Internet, just my phone. No problems using mobile data - just WiFi. Seems like a DNS lookup problem perhaps? Anyway, it is getting worse.

[maximilianpaul]

This issue started for me late last week, too, have you made any headway? I've had my phone since March, and we have Spectrum Mobile. I have some strangeness going on with the data/WiFi, too. Mine won't make calls of any kind sporadically, but recipients say they're getting a call on their end that doesn't connect when they answer it (I don't even hear a ring). Data connection keeps dropping out entirely - status bar shows the crossed circle where signal strength should be. WiFi stays connected in the status bar, but apps and webpages won't load or refresh.

[mattb]

I've rung Samsung Customer Services and they were very helpful. They took over my phone and went through everything that could cause the problem and there was nothing wrong. I've contacted my network provider to send me another SIM card but I'm still waiting. I don't make many calls and when I do there isn't a common theme that could cause the problem. I'll see what the new SIM does and take it from there.

[maximilianpaul]

Out of curiosity, are you using a physical SIM? This is my first experience using an eSIM, and I'm curious if that's the problem somehow. 

[mattb]

No I'm using a physical SIM but I should have the new one in a few days so fingers crossed.