O2 Internet Speed test and troubleshooting

 O2 broadband Speed test

Click on the “Go” button on the Ookla Speed test to confirm the speed of your O2 internet connection.

Information on how to troubleshoot problems with your O2 broadband can be below.

For a more accurate reading, run the Speedtest twice


How to troubleshoot O2 broadband internet speed

O2 Internet Speedchecker - Slow broadband speedBefore you start troubleshooting the performance of your O2 internet connection, you firstly need to run the O2 Internet Broadband speedtest and also confirm the exact Upload and Download speed that you are paying for.

You can get this info by checking your O2 bill or contact O2 to confirm this information.

Possible causes of O2 slow broadband speed

Is it the O2 broadband that is slow or is it your device (PC/laptop/phone)?

You need to check how many applications are concurrently running on your device that could be utilising your system resources (mainly RAM memory and CPU) and/or your O2 internet bandwidth.

If you’re on a PC then you can use the task manager to check your CPU and memory utilization.

On any other device you should try restarting the device which should hopefully shutdown all applications that may have been running in the background.

Re-run the O2 speed test on your personal computer and your phone to see how the speedtest results compare between the 2 devices.

This should hopefully give you some information to work with in terms of if the problem lies with your device or the O2 internet connection.

Is your wireless connection the problem?

The cause of the issue could be your wireless network connection and not the O2 broadband internet connection.

You could rule out the wireless network being the cause of the problem by connecting your PC directly into the O2 broadband router using a network cable and run the O2 speed test again.

If the speed improves when you are connected using an ethernet cable then this proves that the problem could be with the Wifi network connection setup.

Possible things to check are:

  • Are the Wireless channels you’re using for your Wi-Fi network network (SSID) overlapping with your neighbors?
  • Could your Wifi signal from the router be obstructed?
  • Does the performance improve when you’re stood directly infront of the O2 broadband or wireless router?
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Who is connected to my Wi-Fi network?

Have you checked that your Wi-Fi network password has not been compromised? Do you have an open Guest Wifi network?

Neighbors could be using your Wi-Fii network and using up all the O2 bandwidth downloading/uploading or even streaming netflix! Worse than that, they could be carrying out illegal activities which will all point to your connection.

There are two apps that you can use to scan your Wifi network to check who is connected:

Both applications will scan your Wifi network and show you a list of the connected devices.

Check out this tutorial on how to use both applications

Do I need a wireless Booster for my O2 broadband?

If you find that you have Wi-Fi black holes in your house, then a Wifi extender aka a wireless Booster is the solution to boost your signal. They are readily available online from around £15.

The Wi-Fi network booster simply picks up your existing Wifi signal as it is starting to become weak and then re-transmits the wireless signal at a more stronger rate to extend it’s coverage.

Place the wireless network booster/extender where your wireless signal from the O2 broadband router is becoming weak.  Approxiametly where your Wi-Fi network signal drops down to 2 bars. Use your mobile phone to determine where this is.

When was the last time you upgraded your O2 broadband router?

The O2 and openreach infrastructure is constantly being upgraded to support new features (some end user facing and others internal).  Ensure that the O2 broadband router has the latest software.

Most O2 broadband routers allow you to carry out the software upgrade by logging into the O2 broadband router and simply clicking a button to perform the upgrade.

If you cannot do this, contact O2 and they will be able to either do this for you or guide you through how to do it depending on the O2 router model you have.

As well as updating the software, if you have had the same hardware for a long period, it is worth speaking to O2 to ask for a hardware upgrade.

Is the issue external (at the exchange)?

This is probably the most common reason for O2 broadband performance problem in your area and it’s more common for broadband connections that are delivered through phone lines.

If you are unsure if this is applicable to you, you should contact O2 who will be able to conduct the appropriate line checks to check if there is a problem on the O2 internet line.

Is it due to O2 Internet congestion?

If you are finding that the O2 internet connection speed in your area is slow during certain periods i.e. over weekends and evenings, it may be due to congestion during peak times.

You should contact your O2 to understand if the service you subscribed to has a guaranteed speed or is  a contended ‘first come first serve’ service with no minimum speed guaranteed.

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Re-testing your O2 internet connection

After the issue has been fixed either by yourself or O2, retest your internet connection using  at least 2 independent speedtests such as the one here and Ookla internet speedtester to ensure the fault is resolved.

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