Call Drops: Common Causes & Fixes

A call drop is a sudden end of a phone call on its own before you or the other party hangs up the call. This means you’re talking, and then, without any warning, the line cuts off.

In simple terms, a dropped call breaks the connection and stops your conversation unexpectedly. It can happen with any call, whether it be on cell phones, landlines, or internet-based apps.

Phone calls drop due to weak signal strength, network congestion, or software and hardware issues on mobile devices. Traditional landlines may experience dropped calls because of faulty wiring, outdated equipment, or electronic interference. VoIP or internet-based calls often face call drop due to low bandwidth and unstable internet connections.

1. Weak Signal Strength: Being far from a cell tower, underground, or in areas with poor network coverage reduces signal strength and causes your calls to disconnect unexpectedly.
2. Network Congestion: During peak hours or in crowded locations, too many users are connected to the same tower, which overloads the network and leads to dropped calls.
3. 5G and LTE Switching Issues: Automatic switching between 5G and LTE (Long Term Evolution) networks or between nearby towers may fail during handoff, interrupting your call mid-conversation.
4. Outdated Software: Running an outdated version of iOS or Android also affects your phone’s ability to maintain a stable cellular connection.
5. SIM Issues: A damaged, loose, improperly inserted, or incorrectly provisioned SIM/eSIM causes repeated call drops.
6. Incorrect Setting: Disabled VoLTE (Voice over Long-Term Evolution), misconfigured APN (Access Point Name) settings, incorrect network mode selection, or inaccurate date and time settings disrupt call stability.
7. Background System or App Interference: Security apps, intensive battery-saving mode, malware, or heavy background processes interfere with network services and cause instability during calls.
8. Roaming Issues: When traveling outside your carrier’s primary coverage area or internationally, roaming configuration errors result in unstable connections and dropped calls.
9. Interference from Nearby Electronics: Strong electromagnetic interference from certain electronic devices or metal accessories weakens signal reception in specific environments.

1. Wiring issues: Loose, damaged, or aging wires often weaken the signal and cause dropped calls. Even if the wiring looks fine externally, internal damage still disrupts the connection.
2. Interference from Other Electronics: Cordless landlines use radio frequencies, which can be affected by nearby electronic devices, leading to poor call quality or disconnections.
3. Outdated Equipment: Old telephones, splitters, or line filters may not function efficiently, resulting in reduced sound clarity and unstable connections.

1. Low Bandwidth: VoIP calls need a stable internet speed to transmit voice data smoothly. If your network does not have enough bandwidth, especially when multiple devices are connected, it reduces VoIP call quality and increases the likelihood of dropped calls.
2. Router Configuration: Incorrect router settings prevent voice traffic from being properly prioritized. If VoIP ports or SIP (Session Initiation Protocol) settings are not configured correctly, calls drop during active conversations.
3. Poor QoS Settings: Quality of Service (QoS) settings control which data gets priority on your network. If VoIP traffic is not prioritized, other activities like streaming or downloads can also affect your calls.

To fix dropped call issues, move to an area with a stronger signal or Wi-Fi coverage. Reset network settings, switch to a more stable network mode, update your device software, and ensure your SIM card is properly inserted. If problems continue, contact your carrier or service provider to check for coverage or line issues.

If you are on a cellular network call, move outdoors or closer to a window to improve signal strength. Avoid basements, elevators, tunnels, and remote areas with weak coverage. For Wi-Fi calls, stay close to the router to maintain a stable connection.

Turn on Airplane Mode for about 30 seconds, then switch it off. This forces your phone to reconnect to the nearest cell tower and refresh network registration. This is one of the easiest and quickest ways to fix dropped calls on Android and iPhone devices.

Go to your phone’s settings and reset network settings. This clears misconfigured mobile data, Wi-Fi, and APN settings that may be causing instability.

i. On iPhone:

• Open the Settings app and select General.
• Scroll down and tap Transfer or Reset iPhone.
• Choose Reset, then select Reset Network Settings from the list.
• Confirm your decision to proceed with resetting your network settings.

ii. On Andorid:

• Open the Settings app.
• Select General Management or System, depending on your device.
• Tap Reset or Reset options.
• Choose Reset Network Settings.
• Enter your passcode and confirm to complete the reset.

If 5G is unstable in your area, switch your preferred network type to 4G/LTE. This can provide a more stable connection and reduce call drops caused by weak 5G coverage.

Install the latest system update on your phone to fix bugs affecting connectivity. Also, update any VoIP or calling apps to ensure compatibility with current network standards.

Here are the steps to update your phone software:

1. Open the Settings app on your phone.
2. Tap on Software Update (you may find it under General or System).
3. Check for available updates and tap Download and Install if a new version is available.

Power off your phone and remove the SIM card carefully. Clean it gently, reinsert it properly, and restart your device.

Turning off restrictive battery-saving or data-saving modes helps maintain a stable connection during calls, especially for internet-based calling apps.

Here are the steps to deactivate battery saver and data saver mode on both Android and iPhones:

1. Swipe down from the top of your screen to open the Quick Settings panel (Android) or Control Center (iPhone).
2. Find the Data Saver/Battery Saver, and tap it to turn it off.

Clear all running apps to free up system resources. Remove suspicious or unnecessary apps that may interfere with network performance.

Restart your mobile phone to refresh its connection to the network. If using internet-based calling, turn off your router and modem for 2–3 minutes before turning them back on. For landlines, unplug the base unit briefly and reconnect it securely.

VoIP calls require stable bandwidth. Run a speed test to check download speed, upload speed, and VoIP latency. If speeds are low, upgrade your plan or reduce network usage.

If none of the above solutions resolve the issue, contact your service provider. Ask them to refresh your network registration, check for outages, inspect tower coverage, or run a line test.

When calls disconnect unexpectedly, it affects the customer experience negatively, harms your brand reputation, and can lead customers to choose a competitor instead.

1. Reduced Customer Satisfaction: Frequent call drops frustrate customers. They feel neglected or undervalued, especially when they’re looking for support and assistance.
2. Damaged Brand Reputation: Repeatedly dropped calls create an impression of unprofessional business. It can significantly harm your company’s image.
3. Missed Sales Opportunities: When calls end suddenly when you're trying to make a sale, potential customers may discontinue the conversation. So, you may lose customers, too.
4. Lowered Employee Productivity: Dropped calls interrupt work processes and force employees to reconnect with customers and repeat the same information. This wastes valuable time, delays issue resolution, and reduces overall productivity.
5. Competitive Disadvantage: If your business frequently experiences dropped calls, customers may become frustrated and choose competitors that offer more reliable communication and better service.

Dropped calls can interrupt important conversations and affect both personal communication and business operations. Most call drop issues are caused by signal problems, network settings, device glitches, or outdated software, and can often be resolved with simple troubleshooting steps.

However, for businesses that depend on consistent and uninterrupted communication, basic troubleshooting may not fully prevent recurring call drops. Calilio, a cloud-based phone system built on a high-performance global network, is designed to address common technical causes of VoIP call drops such as latency, jitter, and packet loss.