Troubleshooting network problems

1. If you see the icon in the status bar or the top of the screen of your device, deactivate the plane mode.
2. Check if your phone indicates that you have mobile network.
3. Check if you have a message indicating that your SIM card is poorly inserted.
4. Try to select the network manually.
5. If the problem is linked to a Wi-Fi network, try to make sure that your device may forget the network, then reconnect.
6. Try to reset the network settings.

What are the solutions in the absence of a network on my mobile phone

You encounter network problems with your mobile? Here are the items to check on your phone to find a connection.

What is due to the absence of a network on my mobile?

The absence of a network on your mobile can be explained by several factors:

• You are in an area where the network coverage is low, even nonexistent, or your SIM card no longer captures the network
• The parameters of your device have been involuntarily changed, blocking access to the network
• If the data use limit is reached, this may have the effect of blocking the partner network 2

If there is no network on your phone, you can solve the problem in this way: turn off your device, then turn it back on.

I don’t have a network on my phone. What should I do?

To find access to your mobile network and recover your services, you must perform several checks on your device.

1. If you see the icon in the status bar or the top of the screen of your device, deactivate the plane mode.
2. Check if your phone indicates that you have mobile network.
3. Check if you have a message indicating that your SIM card is poorly inserted.
4. Try to select the network manually.
5. If the problem is linked to a Wi-Fi network, try to make sure that your device may forget the network, then reconnect.
6. Try to reset the network settings.

After checks, if you always have network problems related to your mobile, please contact our technical support.

Disable plane mode

Airplane mode cuts all connections (Wi-Fi, Bluetooth and Mobile Networks). To deactivate it, follow the steps related to the model of your device.

When your device is in plane mode, it is possible to reactivate Wi-Fi and Bluetooth.

iphone

In Settings, deactivate the switch vis-à-vis airplane mode.

You can also start the control center, Then press the airplane mode button . The pellet is grayed out when the mode is disabled.

If necessary, get more details on using the plane mode on an iPhone.

Samsung

1. In Settings, select Connections.
2. Press the option Offline mode To activate or deactivate plane mode.

You can also sweep the screen from top to bottom, then press the icon . The pellet is grayed out when the mode is disabled.

Android (others)

Note : Depending on the model of your device, the procedure can vary slightly.

1. In Settings, Press on Network and internet.
2. Activate or deactivate the airplane mode.

You can also sweep the screen from top to bottom, then press the icon . The pellet is grayed out when the mode is disabled.

If necessary, get more details on using plane mode on an Android device.

Understand the connection symbols

These symbols are displayed at the top of the screen of your mobile phone. They indicate the state or type of connection.

List of connection symbols

G : GPRS connection

E : EDGE connection

3G: 3G connection

H (HSPA): Connection 3.5g

H+ / HSPA+ DC: 4G connection

5G: 5G connection

LTE: LTE connection

LTE+: Advanced LTE connection, the device uses several LTE frequencies at the same time to reach faster speed

Essential network. / / / / : No mobile network

Please note: if you are in an area where the signal is low or non-existent, you can activate the Wi-Fi calls function, if your phone is compatible. discover how to do it.

Attempt to select the network manually

To access the 5G network, you must be in a zone with 5G cover, and your device must be compatible: type Support follow -up of Model of your device in the search bar at the top of the page to find your technical sheet and user guide.

Although the option is usually activated by default, you can manually select the network mode in your device settings. Follow the steps corresponding to your mobile phone model.

iphone

1. In the Settings, select Cellular network.
2. Press on Options, then on Voice and data.
3. Select the desired network mode:
   • 5G activated (force activation at any time)
   • 5g auto (only active if it does not risk considerably reducing battery life)
   • Lte
   • 3G

The options 5g are only displayed in the case of 5G certified devices by Videotron.

If necessary, see more details on the use of 5G with an iPhone.

Samsung

1. In the Settings, select Connections.
2. Press on Mobile networks, then on Network mode.
3. Select the desired network mode:

• 5G/LTE/AMRC-LB/GSM (Auto connection)
• LTE/AMRC-LB/GSM (Auto connection)
• AMRC-LB/GSM (3G) (Auto connection)
• AMRC-LB only
• GSM only

The options 5g are only displayed in the case of 5G certified devices by Videotron.

Google Pixel

The options 5g are only displayed in the case of 5G certified devices by Videotron.

If necessary, see more details on problem solving the 5G network.

Android (others)

Note : Depending on the model of your device, the procedure can vary slightly.

1. In the Settings, Select (depending on your model):
   1. Motorola: Network and internet >Cellular network >Advance >Favorite network type
   2. TCL: Cellular network >Favorite network type
   3. Huawei: Mobile networks >Mobile data >Favorite network type

   The options 5g are only displayed in the case of 5G certified devices by Videotron.

   Attempt to forget a Wi-Fi network

   If the access problem is linked to a Wi-Fi network, it is possible that the procedure so that your device forgets this network pays the situation. Follow the steps corresponding to your mobile phone model.

   iphone

   To make your device forget the network you use:

   

   1. In the Settings, select Wireless.
   2. Press next to the network you use.
   3. Press on Forget this network, then on Forget to confirm.

   So that your device forgets a network to which you have already connected, but that you do not use:

   

   1. In the Settings, select Wireless.
   2. Press on To modify In the area of ​​the screen to display known networks on your device.
   3. Perform one of the following actions:
      1. Press, then on DELETE.
      2. Press next to the network, then on Forget this network and on Forget to confirm.

   Samsung

   1. In the Settings, select Connections, Then Wireless.
   2. Make sure the Wi-Fi switch is activated.
   3. Open the menu at the top right and select Advanced settings, Then Manage networks.
   4. Select the desired Wi-Fi network and press Forget.

   Troubleshooting network problems

   IT networks are the basis of digital companies. To ensure the continuity of activities, computer infrastructure behind these networks must be monitored and managed day and night. IT administrators often encounter problems when managing the IT infrastructure, a key element of their work. An even more important part is the resolution of network problems. Let us discuss certain common problems encountered in a network and how to solve them.

   Network problems

   Network problems range from the unavailability of the device or service to a slow response time, poor health of the server and network performance below average. The problems occurring in a network can be extended, so we have gathered network problems in four categories according to their origin.

   1. Material problems: unavailability of equipment and performance problems due to physical connections and material load
   2. Software problems: unavailability of service, unavailability of processes, operating system problems and slow service response time
   3. Bandling problems: unstable WAN links and mediocre VoIP calls due to jig, latency and loss of packages
   4. Configuration problems: hardware failure due to poor configuration

   Troubleshooting the network problem becomes easier when you identify the source of the problem.

   Basic principles of network breakdown

   IT administrators must be prepared to manage network problems and reduce their average repair time (MTTR). To get a lower MTR, you must have a clear understanding of network problems. The four-step method described below can help you better understand the underlying network problems and maintain a 5N network.

   Step 1: Identify the network problem.

   2nd step: Gather information and follow the primary cause.

   Step 3: Solve the problem.

   Step 4: Document the problem and the troubleshooting process.

   By following the routine above, you can clearly understand network problems and teach other network technicians the possible network traps and the necessary troubleshooting steps. However, the real challenge is to identify network problems before end users are affected.

   OPMAINER: identification and troubleshooting software for network problems

   OPMAINER DE MANAGENGINE is complete network surveillance and network supervision software. It analyzes network devices such as switches, routers, servers and storage devices for availability, integrity and performance. OPMAINER also monitors the response time, loss of packages, services, processes and other material measures. By providing real -time information on your network, OPMAINER helps you identify and resolve network problems before end users are assigned.

   Network problems and troubleshooting advice

   Some of the current network problems encountered by network administrators are:

   • Slow network speed
   • Bad performance WAN and VOIP
   • Slow response time of application

   Troubleshooting network problems

   The underlying causes of these network problems, as well as their solutions, are described below.

   1. Slow internal network speed

   1. Blocked requests: A large number of requests at the same time leads to slow network speeds. This can be resolved by adding more bandwidth to your network, generally by renegotiating with your FAI.
   2. Multimedia streaming: The broadcasting or downloading of large files over long periods leads to a slowdown in the network, affecting other critical commercial functions. You can block multimedia diffusion sites behind the firewall. In addition to blocking these sites, you can identify the top speakers via OPMAINER.
   3. Obsolete material: Obsolete equipment has a significant impact on network speed. Thanks to OPMAINER, you can constantly analyze network devices and identify the equipment with high use of the processor and RAM over long periods. Once identified, put the equipment to level after having evaluated the current and future needs.
   4. Switching loop: A switching loop occurs when there are several connections between two switches in a network or when two ports of the same switch are connected. This floods the emission network and increases the time required to reach the destination. Using OPMAINER, you can monitor individual switch ports, proactively detect the diffusion storms and solve loop problems faster.

   2. Bad performance WAN and VOIP

   1. Latency: Latence is the time between a request and its corresponding response. When the latency is higher, the response time to requests increases and the experience of the end user is greatly affected. The RTT WAN monitor of OPMAINER allows you to configure thresholds for the round-trip time and instantly warn you when a threshold is exceeded.
   2. Gigue and loss of packages: The jig is the result of an asymmetrical transmission of data packets. This makes audio and video calls jerky. The loss of packages in a network is generally due to the congestion of the network. A loss of packages from 1 to 2.5% is acceptable; Everything preceding will cause interrupted calls. Using OPMAINER, you can define thresholds and receive alerts in real time on jig and loss of packages.
   3. Average opinion score (MOS): MOS is a collective measure of the quality of calls. It is calculated according to parameters such as latency, jig and loss of packages. It varies from 1 (mediocre) to 5 (excellent). Using OPMAINER, you can define a lower limit for MOS and be alerted when the quality of the call falls beyond the defined limit. This helps you immediately examine network congestion and improve the quality of calls.

   

   3. Slow response time of the application or server

   Slow network speeds and mediocre WAN performance mainly affects the internal team, but the repercussions of slow response time for an application or application server can be disastrous. A slow response time has not only an impact on your income and your reputation, but also causes legal disputes, because you may have a QOS agreement with your customers.

   1. Increase in server load: An increased load on your application servers can cause high use of the processor and RAM, making the server incapable of managing all incoming requests. Naturally, the response time increases, affecting customers. Using OPMAINER, you can define thresholds to quickly identify server performance problems and receive instant alerts on server performance problems.
   2. Services: Some applications or servers of application require that certain services run in the background for successful requests for requests. When these services are no longer available, applications may not respond to requests. Using OPMAINER, you can monitor critical services for hosted applications and be alerted in real time when one of the services is not available.
   3. Server process: Certain processes carried out on the application server can consume more RAM and processor, which slows the response time. In addition, processes can listen to the important ports that applications need. This prevents applications from listening to critical ports, resulting in slow response time and application failure. This network problem can be solved with OPMAINER by proactively monitoring server processes. In addition to monitoring, you can also use OPMAINER to remotely stop the processes on any server.

   How to solve network problems with OPMAINER DE MANAGENGINE?

   You can see how important it is to identify network problems for faster troubleshooting. OPMAINER is one of those tools that help you identify network defects. For example, when Opmanager warns you of using an application server processor, you can:

   1. Immediately locate the application server.
   2. Analyze the processor’s peak.
   3. Follow the processes responsible for the peak of use of the processor.
   4. Kill the processes at a distance.

   OPMAINER saves you a lot of time and resources when replacing network problems, while giving you peace of mind. With OPMAINER, you can also generate systematic reports on several aspects of your network, which helps you understand the performance of the network.

   Tool boxes for troubleshooting in OPMAINER

   OPMAINER also has practical integrated tools to solve network problems. These network troubleshooting tools include simple troubleshooting utilities based on the command line which allow a systematic and effective approach to network troubleshooting. Some of the network problem solving tools include:

   • Ping
   • Tracery
   • Ping SNMP
   • DNS resolver
   • DHCP stretch instructor
   • WMI request editor
   • CLAI Request publisher
   • SNMP tool
   • Cisco Tools

   Whether it is a critical application server problem or a network problem, OPMAINER is there for you. Download OPMAINER Now and avoid network problems.

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