Should I test my broadband speed on Wi-Fi or with a cable?

Both are useful, but they show different things.

A cable speed test gives the clearest view of the broadband speed coming into your home. A Wi-Fi speed test shows the speed your phone, laptop or tablet is getting in that room.

For example, if your cable speed test is good but your bedroom Wi-Fi speed is slow, the issue may be Wi-Fi coverage inside the home, not the broadband connection itself.