How to Fix IMS Registration Status Not Registered?

How to fix IMS Registration Not Registered
How to fix IMS Registration Not Registered

In the realm of mobile technology, the IMS Registration Status plays an integral role in ensuring devices can utilize internet-based communication services provided by a carrier, such as VoIP, video calling, and messaging.

Encountering an ‘IMS Registration Status: Not Registered’ error can disrupt these services, indicating that the device is not properly provisioned to utilize the carrier’s IMS (IP Multimedia Subsystem) network.

This issue can stem from several factors, including problems with the SIM card, software glitches, or network-related issues.

Addressing the IMS registration error involves a methodical approach to pinpoint and resolve the underlying cause.

A non-provisioned device, for example, requires carrier activation, while other issues may be resolved by resetting network settings or updating the device firmware.

My understanding is that troubleshooting this error is crucial to restore the full spectrum of services that modern smartphones offer over the carrier’s network.

The aim is to achieve a successful IMS registration to facilitate seamless communication capabilities.

Understanding IMS Registration

In this section, I will discuss the essentials of IMS Registration, a key component in ensuring network connectivity. I’ll examine its definition and significance within network services.

What Is IMS Registration?

IMS Registration refers to the process where a device attempts to connect to the IP Multimedia Subsystem (IMS) network of a service provider.

This subsystem is vital for delivering IP multimedia services, such as VoIP calls and video conferencing.

To make use of these modern communication services, my device must be registered and recognized by the network.

Proper registration with IMS is a prerequisite for accessing various network services.

The Role of IMS in Network Services

The role of IMS within network services is crucial. It enables:

  • High-quality voice and multimedia services: IMS supports VoIP, which offers superior voice quality over traditional circuit-switched connections.
  • Interoperability among service providers: This ensures that services like video calls work smoothly across different networks.
  • Converged services: IMS allows the use of multiple forms of communication, including voice, video, and messaging, over a single network.

By registering with IMS, I ensure that I can utilize these advanced network functions with my service provider. It’s a foundational step for modern communication technologies that rely on internet connectivity.

How to fix IMS Registration Status: Not Registered?

How to fix IMS Registration Not Registered
How to fix IMS Registration Not Registered

When attempting to diagnose IMS Registration failures, I focus on several specific factors that commonly contribute to such issues.

These include discrepancies with network connectivity, SIM card integrity, software functionality, and account provisioning.

1. Network Issues

I check the network connectivity first since a strong signal is fundamental for IMS registration. Factors such as out-of-service areas, network congestion, or temporary outages could prevent the IMS Registration status from changing to “Registered.” A device should be in a location with good signal strength and network availability.

2. SIM Card Problems

The integrity of the SIM card is also critical. If a SIM card is defective, improperly inserted, or otherwise incompatible with the network, it can lead to an “IMS Registration: Not registered” status. Ensuring the SIM card is active, properly seated, and functional is an essential step.

3. Software Bugs

Occasionally, software glitches may hinder IMS registration. These bugs can stem from outdated software, corrupted system files, or conflicts after a software update. A device’s radio firmware needs to be in good working condition and free from corruption for successful IMS registration.

4. Account or Service Restrictions

Finally, account-specific or service-related restrictions can prevent IMS registration. A device may not be provisioned correctly with the carrier, or there might be restrictions placed on the account itself, such as a suspension or unpaid bills. Ensuring that the device is fully provisioned and the account is in good standing is necessary for IMS services to work properly.

Preliminary Checks

Before diving into advanced troubleshooting, it’s essential to perform some basic checks. These are often overlooked but can be quick fixes for IMS registration issues.

1. Checking Network Connectivity

To ensure that my device is capable of IMS registration, I first confirm active network connectivity. I:

  • Look for the signal bars indicator on my device.
  • Switch to Airplane mode for a moment, then disable it to reset network connection.
  • Attempt to make a call or use data, verifying the network is functional.

2. Verifying SIM Card Activation

Next, I check if the SIM card is indeed activated and recognized by the device. I do this by:

  • Ensuring the SIM card is inserted correctly into the slot.
  • Restarting my device to refresh the SIM card connection.
  • Accessing my device’s settings to view SIM status.

3. Ensuring Service Plan Compatibility

My service plan must support IMS registration. To confirm this, I:

  • Review my service plan details to verify IMS support.
  • Contact my network provider if unsure about plan features.
  • Compare plan features with other devices under the same plan that have successful IMS registration.

Basic Troubleshooting Steps

When dealing with IMS (IP Multimedia Subsystem) registration issues, a few basic steps can be instrumental in resolving the problem. These are methods that I can complete before seeking further technical assistance.

1. Restarting Your Device

Before anything else, I always recommend a simple restart of the device. This can resolve transient issues and clear temporary software glitches that may be causing the IMS registration error. To restart my device, I will hold down the power button and select the ‘Restart’ option. Once the device has powered back on, I’ll check to see if the IMS status has changed to registered.

2. Updating Device Software

Outdated software could be the culprit behind IMS registration problems. I check if my device’s software is up to date by navigating to Settings > System > Software Update. If an update is available, I ensure that my device is connected to Wi-Fi and plugged into a power source before I proceed with the update.

3. Resetting Network Settings

If the above measures don’t solve the problem, I might find a solution in resetting my network settings. This would revert all network-related configurations back to their original state. To reset these settings, I go to Settings > General Management or System > Reset > Reset Network Settings. After confirming the reset, the device will restart, and I will need to re-enter Wi-Fi passwords and re-pair Bluetooth devices.

Advanced Troubleshooting Techniques

When the usual fixes fail to resolve the IMS registration status of ‘Not registered’, it’s time to delve into more advanced techniques to pinpoint and solve the problem.

1. Reconfiguring IMS Settings

To reconfigure the IMS settings on your device, you might need to access hidden menus, which can vary based on the phone’s manufacturer. For most Android devices, I dial *#*#4636#*#* to enter the testing menu, select ‘Phone Information’, and then toggle the ‘IMS Registration’ switch to attempt re-registration.

2. Clearing Cache and Data for Caller ID App

Sometimes the issue stems from corrupted cache files. I navigate to my phone’s settings, find ‘Apps’, and select the Caller ID app. I choose ‘Storage’ and click on ‘Clear Cache’ and ‘Clear Data’ to remove any temporary files that could be causing issues with IMS registration.

3. Accessing Service Mode

Entering service mode might provide deeper insights. On Samsung devices, for example, I dial *#0011# to access this mode. From here, I can gather information about network settings that could influence the IMS registration process.

4. Contacting Your Service Provider

If after performing all other troubleshooting steps the issue persists, then it’s time I get in touch with my carrier. My service provider likely has tools and methods beyond what’s available to me for diagnosing and resolving network-related issues like non-registered IMS status.

Solutions for Specific Devices

In addressing IMS registration issues, it’s key to tailor the solution to the specific device in question. Here’s how I approach fixes for both Android and iOS devices.

  • Fixes for Android

For Android devices experiencing the “IMS Registration Status Not Registered” error, the fix usually involves a series of troubleshooting steps:

  1. Restart the device: This can reset the network connection and resolve temporary glitches.
  2. Check for updates:
    • Navigate to Settings > System > Advanced > System update.
    • If updates are available, install them to address potential security and performance issues that might interfere with IMS registration.
  3. Reset network settings:
    • Go to Settings > System > Advanced > Reset options > Reset Wi-Fi, mobile & Bluetooth.
    • Confirm by selecting Reset settings.
  4. Replace the SIM card:
    • If the SIM card is defective or incompatible with the network, replacing it often resolves the issue.
  5. Contact your carrier:
    • They can re-provision the device on their network, which is sometimes necessary for IMS registration to succeed.
  • Fixes for iOS

For iPhones, the approach is slightly different but similarly methodical:

  1. Check for iOS updates:
    • Open Settings > General > Software Update.
    • If there’s an update available, download and install it.
  2. Reset network settings:
    • Navigate to Settings > General > Reset > Reset Network Settings.
    • Enter your passcode and confirm by selecting Reset Network Settings.
  3. Remove and reinsert the SIM card:
    • Power off the device, remove the SIM card, wait for a minute, reinsert the SIM, and turn the device back on.
  4. Contact Apple Support or your carrier:
    • If none of the above steps work, contact Apple or your carrier as there may be an issue with your account or network settings that only they can resolve.

Preventative Measures

To ensure consistent IMS registration, I focus on two primary areas: software maintenance and account verification.

1. Keeping Software Up to Date

I regularly check for and install software updates, as they often contain fixes for connectivity issues that could affect IMS registration. This prevents the mismatch of firmware and software elements, which can disrupt IMS services.

  • Check for updates: I navigate to Settings > Software Update to see if any updates are available.
  • Install updates: When updates are found, I make sure my device is connected to Wi-Fi and plugged into a charger before proceeding with the installation.

2. Regularly Checking Account Status

I maintain the habit of checking my account status with my carrier to preempt any service interruptions.

  • Carrier Account: I log in to my carrier’s online portal or contact customer support to confirm that my services are active and properly provisioned.
  • SIM Card Activation: If I have recently changed my SIM card, I ensure that it is correctly activated and registered with my carrier.

In my experience, it’s essential to understand when an issue is beyond your expertise, requiring professional assistance.

If you’ve attempted the usual fixes, such as checking your network settings, replacing your SIM card, and ensuring your device’s software is up-to-date but the IMS status remains “Not Registered,” it may be time to seek a specialist.

Here’s when I would recommend reaching out to a professional:

  • Unresolved Issues after Basic Troubleshooting: If you’ve already tried rebooting your phone, reinserting the SIM card, and manually selecting the network provider without success, there might be a deeper issue at play.
  • Frequent Registration Failures: When IMS registration failures are consistent and prevent you from making calls or sending texts, this indicates a more complex problem.
  • System and Hardware Concerns: Should you suspect hardware damage or inconsistencies with system firmware that might be affecting IMS registration, it’s often best left to those with the right tools and expertise.
  • Carrier-Specific Problems: There are times when the issue lies with the carrier’s services. If others on the same network are experiencing similar problems, contacting the carrier’s tech support is wise.
  • Complex Technical Errors: Error messages or codes that you don’t understand likely need the insight of someone with technical knowledge of IMS architecture and mobile networks.
  • No Resolution with Forums or Guides: Sometimes, online resources don’t solve the problem. In such cases, a professional can provide customized solutions for your particular circumstances.

Remember, seeking help from a certified technician or your mobile carrier’s support team is often the fastest route to resolving complex technical issues, ensuring you get back to full connectivity without risking further harm to your device or software.

Frequently Asked Questions

In addressing IMS registration status errors, it’s crucial to understand the network-specific steps and device-specific procedures that can resolve these issues. The following subsections provide pointed guidance based on different carriers and devices.

What are the steps to resolve an IMS registration failure on a Vodafone network?

If you’re experiencing IMS registration issues on the Vodafone network, you should first ensure your device supports VoLTE. Secondly, verify that the VoLTE feature is activated on your Vodafone account. If needed, contact Vodafone customer support for network-side troubleshooting and provisioning.

How can I rectify an IMS registration status issue on a Verizon device?

On a Verizon device, confirm that Advanced Calling is enabled in your settings as this activates IMS capabilities. If this does not resolve the issue, you may have to reset network settings or contact Verizon for IMS provisioning or to see if there’s a network update that you need.

What methods are available to fix IMS registration problems on T-Mobile phones?

For T-Mobile phones, one common fix is to check and enable VoLTE in your connection settings. If this doesn’t work, resetting your network settings could help. T-Mobile may also have specific IMS registration guidance or updates, so reaching out to their customer service could be beneficial.

What troubleshooting actions should I take if my Samsung phone displays an IMS registration status error?

For a Samsung phone, start by resetting network settings. If the issue persists, check if there’s a software update available for your phone. Should these steps fail, contact Samsung or your carrier for assistance, as the problem might be with the SIM card or network registration.

How do I address an IMS registration status not registered error on Android devices?

Ensure that your Android device’s software is up to date and that VoLTE is active in your network settings. If the problem persists, try removing the SIM card and reinserting it, or perform a network settings reset. For persistent issues, there might be a need for carrier support.

What procedures are recommended for enabling IMS registration on a network?

To enable IMS registration, first, ensure that your device firmware and carrier settings are updated. Check if IMS services are included in your network plan and whether VoLTE is enabled in your device settings. If registration fails, a restart of the device or a reset of the network settings may be necessary.

Posted by
Eric Pascarello

Eric Pascarello from has been the Senior Editor for TechNerdish since quite some time now and he regularly shares how passionate he is about new technology with everyone via this blog.

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