(Moto Z Nougat) Bluetooth switch grayed out - Cannot turn Bluetooth on

[igavuzzo]

Hi everyone.
I have seen some topics about similar issues, however descriptions were kind of short and lacked details, so I am starting this new clear topic hoping somebody can shed some light.

My phone:
- Model: Moto Z.
- Baseband: M8996_1239.53.01.126R SRD
- Kernel: 3.18.31-perf-g1403404-00036-g20e6d7c [email protected] #1
- Security patch: April 1st 2017
- Compilation: NPLS25.86-30-12

Comments:
- Came with Marshmallow, I upgraded it to Nougat two or three weeks ago.
- Used Bluetooth on Nougat perfectly.
- All good until yesterday.

The problem:
- It started last night.
- Only thing I did yesterday that was different from other days is running Play Music, which I had not even opened before. I know this sounds stupid but I do not want to leave anything out.
- When I got home some hours later, Bluetooth would not turn on.
- What happens exactly is:
1. I try to turn Bluetooth on, it takes me to the Bluetooth connection screen. Switch is ON but no devices show up.
2. When I get into Settings, I see the switch is DEACTIVATED.
3. I tap on the switch and it moves, however it remains grayed out and Bluetooth does not turn on.

My failed attempts to solve it:
- Tried restarting.
- Tried clearing Network Settings.
- Tried clearing Bluetooth app cache.
- Tried clearing phone cache from Recovery menu.
- Tried turning off wifi scanning.
- Tried switching off/on every Bluetooth setting I found.
- Tried hard-resetting phone.
- Tried rebooting in safe mode.

Nothing worked and I am lost.

I contacted customer service, and after confirming I had hard-resetted the phone they told me I should send it for repair. I guess that is what they have to tell you when they cannot find a solution... I do not blame them, still I am so afraid they will send me back a refurbished device and so positive this is a software issue that I do not want to do this.

Any ideas? Anything I should try?

Thank you all in advance.
Ivo

 

[Loader009]

Did you try to turn on the flight mode, reboot the phone and then disable flight mode?
With hard reset you mean data/cache wipe, correct?

 

[igavuzzo]

Did you try to turn on the flight mode, reboot the phone and then disable flight mode?
With hard reset you mean data/cache wipe, correct?

2) Yes. Full reset.

1) DUDE... YOU ARE MY HERO. I CANNOT BELIEVE THIS.

I FIXED IT BY DOING THAT! (flight mode - restart - disable flight mode).

Believe me, I had tried (almost) EVERYTHING. FOR REAL. People from Lenovo said my phone needed replacement...

Thank you. And congratulations on your last World Cup (I am from Argentina).

 

[Loader009]

Thx, I am glad this helped.
Some tricks even their hotline does not know

 

[igavuzzo]

Thx, I am glad this helped.
Some tricks even their hotline does not know

I am sad to say a week after this happened BT started having problems again. Now I can turn it on and off, the BT icon shows up in the notifications bar, but no devices are detected nor can my phone be detected by other devices.

I even flashed the BT module but that did not work.

I guess my last chance is Android O.

 

[colin_ktp]

I am sad to say a week after this happened BT started having problems again. Now I can turn it on and off, the BT icon shows up in the notifications bar, but no devices are detected nor can my phone be detected by other devices.

I even flashed the BT module but that did not work.

I guess my last chance is Android O.

I had this problem - BT started to switch off once a day, after few days it wouldn't turn on - only after reboot. 2 more days and it will not turn on at all (you can move switch to "on" but after going back to BT menu it will be off).
Sent for warranty and as far as I remember they just changed some adhesive tape, probably what normally has to be replaced after opening phone. I think that it could be antenna connection problem and BT module internal diagnosis is not allowing it to enable.
Issue with BT switching off was visible again after some time but it started to work normally and update to 7.1 arrived - no isuess so far, altough my zenwatch2 still needs pairing few times a day