Thank you for sharing your concern. We acknowledge your query and apologize for the same. And please follow the easy troubleshooting steps which might help to solve the issue.
Below are the possible reasons why your phone may occasionally drop calls.
If you have recently changed carriers but kept using the same phone, you may need to contact your current carrier for assistance reprogramming the phone. If calls are dropping only in specific locations, contact your carrier for details about their coverage and any outages they may be experiencing. Some networks automatically end calls after 4 hours to prevent unexpected overages from accidentally dialed calls. Calls can drop while traveling between cellular towers or in areas with low coverage. Check the signal indicator and ensure you have at least two to three bars. In particularly busy areas, it is possible for cell towers to become overloaded and drop some calls. Physical obstructions, such as trees, hills or structures, can interfere with signals.
Verify that the SIM card is installed correctly and is not damaged. You can contact your carrier for assistance in testing the SIM. Alternatively, if you have another phone that works with the same carrier, try inserting the SIM card into that phone and test to see if it still drops calls. If it does, you may need to get a replacement SIM card from your carrier.
Inspect the phone for physical or liquid damage. Inspect the Liquid Damage Indicator (LDI) on your phone's battery and in the battery compartment. The LDI should be solid white, or white with pink or purple X's.
Turn off Wi-Fi Calling. Wi-Fi Calling will use your phone's network connection to make a call. You can try turning this off instead.
Navigate to and open the Phone app, then tap More options (the three vertical dots), and then tap Settings. Tap Wi-Fi Calling, and then tap the switch to turn it off.
Note: The Wi-Fi Calling feature may not be available on all carriers or devices.
In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Ask question).
Thank you for writing to us. Warm Regards, Samsung Customer Support.
