Overcoming IoT Connectivity Challenges: Success Story in Resolving 4G Network Disconnections

Reliable connectivity stands as a cornerstone for the success of any Internet of Things (IoT) project, serving as the lifeline that facilitates seamless communication between devices and the central network.

The recent challenge our team encountered underscored the critical nature of this connectivity, highlighting the potential disruptions and operational impediments that can arise when faced with inconsistent network reliability.

We experienced a challenge where some controllers were frequently disconnecting when using the 4G network (IoT SIM card). These disconnects could have hindered data collection and disrupted overall operations.

The Challenge: Troubleshooting IoT: What to Do When Devices Keep Disconnecting?

Vital data dropping off and operations grinding to a halt—that’s what inconsistent connections could have meant for our controller.

Our team knew we had to act quickly and effectively to identify and resolve the issue. Despite limited support from the network provider, a breakthrough emerged: inconsistent MTU values were identified as the culprit.

The Clever Solution: Optimizing MTU for Stable IoT Connections

Despite limited support from the network provider, our team persevered and pinpointed the culprit: inconsistent MTU values. Through rigorous testing and analysis, we devised a clever network configuration change, ensuring all devices operate at a consistent 1300 MTU. This quick and effective solution restored seamless communication and prevented costly disruptions. While we continue to push for a permanent network-wide fix, our team’s ingenuity has already secured immediate stability and improved operational efficiency for our client.

Dealing with Persistent IoT Device Disconnects: Troubleshooting Strategies:

  • Identifying the Root Cause: Our team’s meticulous testing and analysis revealed inconsistent MTU values as the root cause of frequent disconnects.
  • Swift Action: Despite limited support, our team acted swiftly to implement a network configuration change, setting all devices to operate at a consistent 1300 MTU.
  • Immediate Results: The implemented solution led to an immediate improvement in connectivity, preventing disruptions, and ensuring continuous data flow.
  • Operational Efficiency: Stable and reliable connections contribute to enhanced operational efficiency, allowing for seamless data collection and processing.
  • Cost Prevention: The timely resolution of connectivity issues prevented potential costly disruptions, safeguarding both resources and operational continuity.
  • Continuous Improvement: While the current solution provides immediate stability, our team continues to advocate for a permanent network-wide fix to further optimize performance.

The Impact: Immediate results in fixing IoT network issues

The results were immediate and impactful. Our controllers are now enjoying stable and reliable connections, ensuring uninterrupted data flow and optimized performance. This not only enhances operational efficiency but also contributes to valuable insights and informed decision-making.

Top Expert Recommendations: Optimize Your Network Performance by Confirming and Adjusting MTU Values

1. Determine the optimal range:

Before making any adjustments, consult with your network provider to confirm the minimum MTU values for your network. Understanding these parameters is crucial for optimal data transmission.

2. Set MTU within provider guidelines:

Our experts advise setting the MTU value within the range specified by your network provider. Aim for a value that is less than or equal to the minimum recommended MTU. This ensures compatibility and stability in data transmission.

3. Avoid MTU mismatch issues:

Mismatched MTU values between your network and the provider’s infrastructure can lead to data fragmentation and performance issues. Setting the MTU within the recommended range minimizes the risk of encountering such problems.

4. Enhance data transmission efficiency:

Adhering to the advised MTU values helps optimise data transmission efficiency. By aligning your network’s MTU with the provider’s specifications, you create a smoother and more reliable communication channel for your data.

5. Consult provider support:

If you encounter challenges or have questions about the optimal MTU values, don’t hesitate to reach out to your network provider’s support team. They can provide valuable insights and guidance based on the specific infrastructure and requirements of your network.

6. Regularly monitor and adjust:

Network conditions and requirements may change over time. Our experts recommend periodically reviewing and, if necessary, adjusting the MTU settings to ensure continued optimal performance and compatibility with your provider’s network.

By adhering to these top recommendations, you can proactively enhance your network’s efficiency, reduce the risk of performance issues, and ensure seamless communication between your system and the network infrastructure provided by your network service provider.


In the world of IoT remote monitoring, connectivity is the lifeblood of successful operations. Our experience highlights the importance of identifying and addressing connectivity issues promptly. Through ingenuity and persistence, our team not only resolved the immediate challenge of frequent disconnects but also laid the groundwork for ongoing improvements. The stable and reliable connections achieved not only enhance operational efficiency but also contribute to valuable insights for informed decision-making. This case study underscores the critical role of proactive problem-solving in ensuring the success of IoT projects. Do you experience unstable GSM connectivity on your IoT devices? We might have a solution. Connect with us for your IoT requirements @https://nuventureconnect.com/services/internet-of-things/

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