A. 1. Check your device settings: Ensure that your phone is set to the correct network mode (e.g., 4G, 3G) and that airplane mode is turned off. 2. Move to a different location: Sometimes, signal strength can vary significantly based on your location. Try moving to an open area or higher ground. 3. Restart your device: A simple restart can refresh your connection to the network. 4. Update your device: Ensure your device's software is up to date, as updates can improve connectivity. 5. Use Wi-Fi calling: If available, enable Wi-Fi calling in your device settings to make calls over a Wi-Fi network when signal is weak.