MTCC RK3188 KLD6 Bluetooth for calls problem

[thintin]

I'm looking for help to resolve my 'Head Unit to Handset' Bluetooth calling problem.

My handset is a Sony Xperia XZ Premium (G8141) running Nougat 7.1.1 (O2 Stock ROM build 45.0.A.5.1)
My head unit is an Autopumpkin 11-RQ0546-UK-A (MTCC RK3188) currently running Malaysk 5.1.1 ROM and KLD6 V2.83 MCU with Microntek Head Unit Service V2.18

My HU and Handset are paired and media audio plays fine (with the Bluetooth app open on the HU).
When the devices first connect the phone shows 'Connected for Media and Calls' and the HU bluetooth app shows all of the options available (media, calls, phone book etc) but only for 1-2 seconds then they all become unavailable and the phone changes to 'Connected for Media'. When my phone rings nothing happens on the HU and my phone does not show the bluetooth speaker option in the phone app.

This HU worked great for calls with my previous handset (Xperia Z3 Android 6) and I was running Malaysk 4.4.4 ROM but it wouldn't work with my XZ Premium so I tried the following: -
Malaysk 4.4.4 ROM with MCU KLD6 V2.83
Malaysk 5.1.1 ROM with MCU KLD6 V2.83, V2.85 & (even a KLD9 MCU by mistake)
Microntek HU Service as included in ROMS but also newest version from XDA thread (both Bluetooth settings from this app)
all different MCU System settings for Bluetooth that are available (about 5 or 6 from memory).

Nothing seems to make things work. Some settings disable the bluetooth altogether but mostly the same thing happens, connection with all options available for a few seconds then just media audio.

Due to the length of time required to flash various combinations of MCU/ROM/HU service/settings I was hoping that someone could suggest a quicker way to fix this?

Thanks for reading, Thintin

 

[thintin]

Nobody?

 

[thintin]

Update: my Xperia XZ premium has updated to android 8 and now Bluetooth works as expected.

 

[shines915]

I got Bluetooth calls to work

I have an Eonon GA5180F with a rk3188 processor. It came with Android 4.4. I wanted to upgrade it to add more apps. I used Malaysk's ROM 5.1.1. All was well, but the Bluetooth calls did not work. The bluetooth music worked. I fixed this by going to settings, then to factory settings, then entering code 126 (or what ever your factory code is), then going to application, to BT and then changing it from IVT_BT to WQ_BC6. I saved it and then rebooted. The calls worked after that.