After the 5.1.0.11 update I tested my C2 and Xperia 10 II with
- Withings Steel HR and Withings Scanwatch, both work with Withings app. At last!
- Fairbuds and Fairbuds XL, both work.
- Sony SRS-XB10 bluetooth speaker, works.
- Voxicon Bluetooth keyboard, works. Also with Android apps, happy to confirm.
Getting the connection was a little shaky at first, on C2 I could not even switch the bluetooth on while in airplane mode. Switching the airplane mode off (without sim-card) allowed me to switch the bluetooth on. Later it worked also with the airplane mode on. Finding the devices took several attempts, deleting devices from the list and trying to reconnect a couple of times. Once connected they worked fine.