The Bluetooth connection has failed

faro49

HW & SW:

• UMI Plus E
• Android 6.0.1
• Security patch: January 5, 2017
• Bandbase version: MOLY.LR11.W1603.MD.MP.V30.4.P12,2017/01/03 10:31
• Kernel: 3.18.31\rom@umidigi.com #17\Fri Feb 17 10:14:52 CST 2017
• Build number: UMIDIGI Plus E.V3.02_201702016
  

The problem:
I cannot connect my Samsung HM1300 bluetooth to UMI Plus E.
In the paired devices it is impossible for me to check the audio of telephone, as shown in the following screenshot:

Impossible to check the box

so the audio is hearing only on the smartphone speaker.
Is the fault of Samsung bluetooth or the software?

Thanks for your help