Originally Posted by Thundermand
LG Optimus 4X HD and Android 4.3 should support a BLE aka Bluetooth Smart. However I was unable to pair my bluetooth 4 heart rate monitor and use it.
So I looked into it and found that there was not "android.hardware.bluetooth_le.xml" file which I believe is necessary for BLE connections. I also found it in one of the LG Optimus G's custom roms. I put the file to system\etc\permissions file, extracted and installed the zip. Still I was unable to pair the device. I have tried latest CM, PA and Vanir roms.
Have you been able to get BLE working with your devices? Is there something developers might be able to do?
have you tried it on stock rom?
To install custom roms on O4x:
1. upgrade to jb
3. unlock bootloader
4. flash custom recovery (cwm)
5. flash roms
6. if you encounter any issues, search, they've been answered already.