To stop Bluetooth from turning on automatically on your iPad, you must disable it in the Settings app, not just Control Center, as Control Center only disconnects it temporarily; go to Settings > Bluetooth and toggle it off, and it will stay off until you manually turn it back on, ensuring it doesn't auto-enable with iOS updates or location changes.
Turn Off Handoff
Completely turning off Handoff would prevent the "handoff" from occurring when your iPhone connects to your car's Bluetooth. When the iPhone automatically discovers devices, the Handoff feature keeps playing media on those devices. You can customize, disable, or change Handoff settings.
Solution
Yes, someone can connect to your Bluetooth without you knowing, especially if your device is set to "discoverable" mode or has older security, allowing for attacks like Bluejacking (unsolicited messages) or more serious BlueBorne attacks that can take control or steal data, but keeping Bluetooth off when not in use and pairing in private locations significantly reduces this risk.
As many of you may have noticed, in some devices, Bluetooth is turning on automatically. This is because the Bluetooth Scanning function is misbehaving in these devices. To Solve this "issue", simply search for Bluetooth Scanning in Device Settings and toggle it off. 1.
Turn Portrait Orientation Lock On / Off
Why does your Bluetooth keep turning on? Your Bluetooth might be turning on because it's on an automatic mode. If you don't turn off your Bluetooth in the Settings, it'll likely turn back on the next day. To disable or turn off your Bluetooth, open "Settings," select "Bluetooth," then toggle off "Bluetooth."
Turn off Wi-Fi and Bluetooth
If you want to completely disable Wi-Fi and Bluetooth for all networks and devices, follow these steps: To turn off Wi-Fi, go to Settings > Wi-Fi and turn off Wi-Fi. To turn off Bluetooth, go to Settings > Bluetooth and turn off Bluetooth.