Bluetooth does not use any data from your data plan. However, when you stream to a Bluetooth device, you will use some of the data in your data plan.
Bluetooth vs WiFi – What's the Difference?
Bluetooth allows devices (such as smartphones) to transmit radio waves. This capability is built into devices, so no other source of data transmission (such as a mobile or Wi-Fi network) is needed. You can use Bluetooth keyboards, mice, and speakers.
If you're worried about running out of your monthly data allowance, rest assured that Bluetooth won't consume anything extra beyond what you use to connect to the internet and stream media.
This last point is worth emphasizing. Bluetooth itself doesn’t use any additional mobile data, but if you use a mobile or Wi-Fi network to connect to the internet and, say, stream a TV show, you’ll use up your data allowance (if you have one). Using Bluetooth to send what you’re streaming to another device won’t use any additional data, but it’s important to keep in mind that it won’t prevent that initial data usage.
