Mobile Data Works But Calls Not Connecting? Fix Guide

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It is common to face a situation where mobile data works perfectly, but calls fail to connect. Your internet opens instantly, but when you try calling, you hear errors like “Call Failed,” “Network Busy,” “Not Registered on Network,” or the call ends immediately. This problem usually happens due to network settings, SIM issues, signal problems, or restrictions on your operator’s side. The good news is that you can fix most of these issues on your own.

This guide explains the main reasons behind the problem and gives clear steps to solve it so your voice calls start working again.

Why Calls Don’t Connect Even When Mobile Data Works

When your internet is working, it means your phone is connected to data service, but voice service depends on a different system. Several reasons can block calls even when mobile data is fine.

One of the most common causes is that your phone is locked on a data-only network mode, especially if it is set to 4G/5G without VoLTE support. If your carrier does not support VoLTE in your area, calls will fail while data continues to work.

Another reason may be SIM registration issues, where your SIM connects to data but fails to authenticate for voice calls. Weak signal, tower congestion, or local outages can also cause this issue.

Account problems like low balance, blocked outgoing calls, or unpaid bills can also silently disable calling service while keeping data active.

Check Your Network Mode Settings

Network mode determines how your phone handles voice and data. If the mode is incorrect, calls may fail.

Open your settings and select a mode that supports voice calls. Many phones work best on 4G/3G/2G Auto, which ensures smooth switching between networks when required for calling. Fixing this simple setting often restores outgoing calls instantly.

Make Sure VoLTE Is Enabled

VoLTE technology allows calls over 4G. If your phone supports it but the feature is turned off, your device may struggle to complete voice calls.

Enabling VoLTE improves call quality, connection speed, and stability. Some networks in Pakistan require VoLTE for calls on 4G, so turning it on solves the issue quickly.

Restart Your Phone to Refresh Network Registration

Restarting forces your phone to disconnect from the tower and reconnect with a fresh network profile. This small step can resolve temporary glitches that stop calls but do not affect mobile data.

Many users ignore this solution, but it is one of the fastest ways to restore call service.

Check SIM Card Status and Alignment

A loose or damaged SIM can cause partial service problems. Your phone may access the internet but fail to authenticate calls.

Removing the SIM, cleaning it gently, and reinserting it properly ensures stable contact with the device. If your SIM is too old, replacing it with a new LTE or VoLTE SIM improves performance.

Turn Off Airplane Mode and Reconnect to Network

Sometimes Airplane Mode is turned on accidentally or stays partially active due to a software glitch. Switching it on for a few seconds and turning it off again forces the device to search for the nearest tower.

This refresh helps the phone regain full voice service, especially in low-signal areas.

Check If Your Number Has Outgoing Call Restrictions

Operators may temporarily block outgoing calls due to unpaid bills, low balance, security verification, or inactivity. When this happens, mobile data still works because data is billed differently.

Calling your carrier’s helpline or checking the official app helps verify if your account is restricted. Removing the restriction restores calling within minutes.

Try Changing Your Location for Better Signal

Sometimes the problem is not your phone but the environment around you. Thick walls, underground areas, elevators, or basements weaken voice signal more than data signals.

Moving near a window or to an open area improves call stability. If tower congestion is heavy in your area, calls may fail while data still works because data uses a different channel.

Reset Network Settings to Fix Hidden Issues

If none of the above methods work, resetting network settings can resolve deeper configuration errors.

After reset, your phone reconnects with default network profiles, clearing any mismatched settings causing the problem. You will need to reconnect to Wi-Fi networks, but your data and apps remain safe.

This fix is helpful when call issues started after a software update or SIM change.

Update Your Phone and Carrier Settings

Outdated system software sometimes causes bugs in the call handling process. Keeping your phone updated ensures compatibility with the latest network systems.

Carrier settings updates improve how your phone interacts with your operator’s network. These updates usually install automatically, but checking manually ensures you do not miss them.

Contact Customer Support If Problem Continues

If calls still fail after all troubleshooting, there may be a network issue in your area or a technical block on your number. Customer support can refresh your service, re-register your SIM, or inform you about temporary outages.

In rare cases, the problem may be due to hardware failure in the phone’s signal amplifier. The support team can guide you on whether a repair is needed.

Final Thoughts

Having mobile data working while calls fail can be confusing, but the issue usually comes from simple settings, SIM problems, or temporary network errors. By checking your network mode, enabling VoLTE, verifying SIM status, refreshing network connection, and resetting settings when needed, you can restore your calling service in just a few minutes.

These easy steps help ensure your phone stays reliable for both internet use and voice calls, whether you are at home, at work, or traveling.

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