1. Check the Bluetooth connection
The connected Bluetooth device doesn't exceed the maximum distance of the Bluetooth connection (usually 8 to 10 meters). It is recommended to close to connect it. After connecting, try to have no metal or other obstructions between the Bluetooth device and the mobile phone. And check whether there is another interference signal, for example, a Router, induction cooker, micro-wave oven, etc.
Confirm whether the device is connected to other Bluetooth devices. If the Bluetooth device is a headset, the phone can be connected at the same time, but it can't work at the same time. You can select the headset you want to use on the Bluetooth interface.
2. Re-pair Bluetooth
Unpair the Bluetooth device, put it back in discovery mode, then pair and connect.
realme UIs: Settings > Bluetooth > Click on the right side of the paired device details icon > click Unpair > Research again to pair.
3. Check the Bluetooth device
a. Check if your Bluetooth device is turned on and check if the device is fully charged.
b. Confirm that the Bluetooth device is available on other devices because it may be damaged or not compatible with the current device.
4. Reset the phone
If the problem still exists, please bring the purchase certificate to the nearby service center for processing.