why is my bt infinity so slow

Use our broadband troubleshooter to test the speed of your BT Broadband or BT Infinity line. We'll then tell you how to understand the test results, and how to make simple changes to make sure you get the fastest speed possible. If thereвs a problem with your line weвll also give you the option to report a fault so we can get it fixed. Connection speed is the speed that your BT Home Hub communicates with the telephone exchange. This is sometimes called 'Sync Speed' or 'Line rate', and is the speed that we quote when you buy a new broadband service. This is the maximum speed your line can support for the type of broadband you're on.


Download speed is the actual speed you receive at your computer at the time you run the test. This can't be higher than the connection speed. Your download speed can be affected by a wide range of factors. These include the time of day, the number of devices connected to your Hub at the same time, and whether you use a wired or wireless connection. You can also test your speed using our My BT app. If you're not a BT Broadband customer: See also: Or, take a look at
Fibre-based broadband like BT Infinity provides a much faster and more powerful internet connection than normal (ADSL) broadband. You can see an estimate of the maximum BT Infinity speed you can expect at.


Rather than running at 'fixed' speeds of say 5Mb, 10Mb or 35Mb, your fibre-based broadband speed will automatically be set to the fastest speed your particular phone line can handle. The main factors affecting the maximum potential broadband speed you'll get are: How far you live from the BT street cabinet that your line connects to. The number of other lines connected to the same BT street cabinet. The processing speed of your computer. Whether you connect to your Hub with wires or using wireless. (Wired connections are best if you want to make the most of the speed of fibre-based broadband).


Once set, your maximum broadband speed should remain stable, only varying if one of the above factors changes significantly. The general level of congestion on the Internet (6pm to 9pm is the busiest time, when speeds may reduce). The speed of individual websites you are visiting. Some have a maximum access speed. Whether you're sharing your connection with others in your home. The general 'health' of your computer. Though the actual speed you'll experience will change all the time, fibre-based broadband is designed to automatically optimise your speed to the current network conditions.

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