Dropped calls
It is normal for calls to drop after eight hours. But if your shorter calls drop frequently, try the following:
For calls dropping only in specific locations, check out 4G/ 5G coverage maps to determine the level of signal you should expect.
Make sure that the touch screen isn't waking up during the call. It may wake up if your cheek presses the touch screen or your fingers touch the buttons, like the End Call button.
Remove any cases or covers from the phone. Some protective cases interfere with reception.
Update the device software to the latest version.
Try calling in a location that dropped your call before to check if it happens again.
If available, move the SIM card to another device and check if calls continue to drop when you call from that device. This test will help Customer Support diagnose the problem.