Time Needed : 10 minutes

Calls often get disconnected due to network problems from intermittent signal to no signal at all. The occurrence of network issues like this can be triggered by many factors including temporary network outages, hardware problems and software-related flaws. Before rushing to a service center, performing basic troubleshooting procedures to eliminate software-related factors is highly recommended. And here are your options.

1. Restart the phone.

   Oftentimes, problems like this are just due to some random app glitches. This is usually the case if the Phone app is enduring some minor errors and therefore isn’t stable. To fix the problem, restarting the phone can help. Not only that it gives a quick breather to the operating system, it also clears out minor flaws that might have caused the Phone app to succumb to a problem. You can carry out the usual reboot or soft reset on your Galaxy S20. To do this, simply press and hold the Bixby/Power key until the power options appear and then tap Restart.Performing a force restart on your Galaxy S20 is also an option. Doing so will end all corrupted apps and system services that might have ruined the phone’s network system. To force restart, press and hold the Bixby/Power button and the Volume Down key simultaneously for about 45 seconds and then release both keys when the Samsung logo appears.Both these methods are deemed effective in dealing with minor issues caused by random software glitches. And this could be the only thing you need to get your Galaxy S20 calls working smoothly again.

2. Refresh cellular network connection (Airplane Mode trick).

   Another simple tweak to deal with random network problems in mobile devices is the so-called Airplane mode trick. It works by giving a simultaneous restart to your phone’s wireless features including cellular network. It is also a simple way to refresh cellular network connections on your phone.Performing this trick has already been proven to work wonders by many smartphone owners, thus can also be the key to fixing phone call issues on your device.To do this, go to Settings-> Connections-> Airplane Mode menu and then toggle the Airplane Mode switch to turn the feature on for a few seconds. While Airplane mode is turned on, all wireless features of your phone are disabled. Restart your phone and then head back to the same menu to turn Airplane mode off again.Wait for your phone to re-establish wireless signals then try to place a test call to see if the problem is fixed.

3. Install new system updates.

   Software updates are usually rolled out to deliver new features as well as bug fixes. Should the problem you’re dealing with is inflicted by some system bugs, installing the latest software (Android) update will likely fix it.To check for available system updates, go to Settings-> Software Update menu then tap Download and install. Wait for the phone to check for new updates. If available, tap OK then Start. The phone will then start downloading and installing the update file.Make sure that your phone has sufficient battery life, storage and a stable Wi-Fi internet for the update download to be successful.After installing the update, restart your phone to ensure that all new system changes are properly implemented. It’s also imperative to refresh the phone’s internal memory and system services.

4. Reset network settings.

   Erroneous network configuration on the phone can also cause some conflicts and could be the main reason as to why calls are dropping. To clear this out, you can do a network reset.Performing this reset will erase all current network settings including customized network options on your device. Any associated errors are likewise obliterated in the process. To do this, navigate to Settings-> General management-> Reset menu and then tap the option to Reset network settings. If prompted, tap Reset settings, enter your PIN or password then tap Reset settings again to confirm.The phone will then start wiping all network settings and then restores the default network values and options. All saved network connections including Bluetooth and Wi-Fi networks are deleted. That said, you will need to re-enable Wi-Fi and reconnect to your Wi-Fi network afterwards.When the reset is finished, restart your phone and then start enabling individual network features.

5. Remount the SIM card.

   In some instances, the problem is directly attributed to a problematic SIM card in use. This is usually the case if the SIM card system gets corrupted and your device suddenly failed to read the SIM card. This then results in unstable network services, network errors and calling issues.To fix the problem, remounting the SIM card is recommended. To do this, you will need to use the SIM ejector tool that came with your phone. If you don’t have it, you can use a small paperclip instead. Before removing the SIM card, be sure to turn off your phone. This is highly recommended to prevent causing any sort of damage to the SIM card or the phone itself.After turning the phone off, insert the SIM ejector into the small hole on the SIM tray. The SIM tray is located on the top-left side of the phone. Gently push the ejector until the tray ejects and then remove the SIM card from the tray. After a few seconds, place the SIM card back into the tray in the same orientation before you remove it. Secure the SIM card in place then gently push the SIM tray back into the phone. When the tray is locked, turn the phone back on and wait until it obtains a stable cellular signal.Then place a test call and see if the problem is gone.