Reception can vary from room to room because walls, building materials, terrain, and nearby structures affect radio signals. Move near a window or to a higher floor and see whether calls become clearer. If your phone supports Wi-Fi calling and your carrier offers it, enabling the feature may help in places where cellular coverage is weak but home internet is dependable.
Check whether the issue affects all calls or only one location, contact, or time of day. Restarting the phone can refresh its connection, and installing available system updates may resolve software problems. If your device has network-selection settings, leave them on the recommended automatic option unless your carrier advises otherwise. Avoid changing unfamiliar advanced settings, which may interrupt service or make troubleshooting harder.
Ask someone using the same carrier whether they have similar trouble in the same spot. If several people do, the cause may be local coverage or a temporary network issue rather than your phone. Contact your carrier with the affected location, approximate times, and examples of dropped calls. Be cautious about buying signal boosters without checking carrier guidance and local rules. A weak signal can also drain battery faster, so Wi-Fi calling may help with both calls and power use.