Samsung Galaxy S21 Keeps Losing Signal (Cellular)

In this video, we will show you what to do if your galaxy s21 keeps losing signal

00:30 Enable airplane mode for a few seconds (Force reboot)
01:13 Make sure you're in an area with good coverage
01:48 Reset the network settings
02:35 Call your service provider

[trucklifee]

OK so I have a possible solution. I thought I needed charg port/ sim card reader board. As no sim message would pop up semi randomly but would happen more often when charging (wireless and cord) so Ordered one and had the same issue. Turned out to be a defective wireless charge coil. I think it had a swinging short before disassembly that became a permanent short when bent upward to remove connector. Would have signal but it would drop the second I reinstalled the wireless charge coil. Left it Uninstalled and haven't had my signal drop or no sim card message since and it's been 2 days.

[rayharmacinski]

OK is anyone's s21 ultra still getting good reception after the last two This is a problem that does not have a DIY solution. It appears samsung has no intention of fixing this since the last two updates didnt address the problem. The last made it even worse. Is this some marketing strategy to get people to buy new phones?