Since iOS11 Bluetooth keeps disconnecting

I'm having similar problems. At first it would pair with my car, but nothing worked and it kept dropping and reconnecting. I searched online and found suggestions, and tried them all except for factory resetting my iPhone 8 and starting over. So far I'm at the point where I deleted my phone from the car, deleted all bluetooth pairings from the phone. Turned off the car, turned off bluetooth on the phone, and restarted the phone. At this point I started the car, turned bluetooth back on on the phone and repaired. The connect/disconnect/reconnect is still happening, but not as frequently (minutes instead of seconds), and when it is connected, everything appears to work. I hope they can fix this in a new firmware and it isn't a hardware problem. I do also have my iPhone paired to our home phone, and I'm not having the same problem with it. It's not a signal strength issue as I have have my iPhone on another floor in the furthest point in the house from the base station that it is paired to, and the bluetooth still works.

This idea of a power management issue has echoes of my experience too. As I said before, my connection never dropped mid-call. It only connects/disconnects when it is sitting idle so to speak. I did try my phone both powered and not powered though while in the car which made no difference.

As a slight update in my case, I contacted Apple support direct last week. Gave them this thread link and the support chat confirmed to me they are not able to access the threads directly from support- so I copied my entire problem post into the chat session. The chat confirmed I was not the first person to seek help for similar reasons that day and my case was 'escalated' to a phone call. The usual questions later, a remote support session was established with my phone ( new one on me ) where analytic details from the phone were collected by Apple while I was connected to wifi. The slightly disappointing end to this wizardry was that I should factory reset the phone using itunes which I have duly done. The assistant advised that the conclusion to the analytics was only that hardware was not at fault. Unfortunately I'm away on business and cannot try it out in my car or any other device.

Come you clever engineers; you've had bluetooth working before!

Ok, I'm not saying if it is fixed yet, I was only in the car a short time and it never disconnected. I upgraded to 11.1.1. I then turned off WiFi and Bluetooth from the Settings app. I closed all running applications and rebooted the phone (Push up volume, push down volume, hold power until the Apple logo appears) After doing that go back to Settings and turn WiFi and Bluetooth back on. After I did that I was in my car for about 20 minutes two times and never had a disconnect. I'll be out and a bout more later today, so I will see if it is really fixed. This is on an iPhone 8+

I took my Accord in to Honda over the long weekend, and they have heard about the problem a lot. They weren't able to do anything, and the people they needed to talk to in CA we off for the holidays. They called them today and gave me a call back saying that they know about the problem and are working with Apple to fix the issue. They said it will come, eventually, with an iOS update, not a firmware update to the car.

I installed 11.2 beta 6 (15C114) last night and it seems to be better. Initially my Pebble app on the phone was complaining about an unknown error but that seems to have gone away.

The phone's not constantly trying to sync contacts with the car, and I was able to stream music without interruptions.

My previous suggestion to disable Wifi (via Control Center, not permanently) is not foolproof. With Wifi disabled, if I'm interacting with the phone while it's connected to the car (i.e., browsing the web while waiting for my fiancée to get off work), the disconnects come back, and are fairly frequent. When I'm not touching the phone, I haven't noticed a single disconnect when Wifi is off. With Wifi on however, this is not the case.

FYI, testing on my iPhone X since iOS 11.2, now on 11.3.

tl;dr

For me, disabling Wifi (via Control Center) lowers the chance of BT disconnect occurring.

• Zero (AFAIK) disconnects when not touching the phone over ~1 month period of testing.
• Disconnects may still occur when physically interacting with the phone.

With Wifi enabled, disconnects occur very often even when not touching the phone.

So, I am having exactly the same problem in my Mazda 6. I am now on iPhone 8 iOS 11.4. The only fix I have found is to switch on airplane mode (with bluetooth and wifi still connected). This has solved the problem..... but does mean I cannot access data when driving!

Hi, I installed 11.1 and it fixed the issues so far.. although, I didn’t see the fix in the release notes

Same thing for me 11.1 fixed the issue spent 40 minutes on the phone (multiple calls) today without disconnect!

Same issue here. Tested all the iOS updates hoping for a fix. Now it’s on iOS 11.0.3 connected to Mazda 6. I’ve reset everting to factory both phone and infotainment system. Unpaired and paired Bluetooth to no avail. Here’s the dump from the iPhone logs (excluding Binary images section):

{"app_name":"bluetoothd","app_version":"","bug_type":"109","timestamp":"2017-10- 14 14:22:29.05 +1100","os_version":"iPhone OS 11.0.3 (15A432)","incident_id":"568294DD-CA8E-4085-873B-3257BA4C452C","slice_uuid":"26 0308ea-4cc6-3d5b-9ca0-5a6141dee9bc","build_version":"","is_first_party":true,"sh are_with_app_devs":true,"name":"bluetoothd"}

Incident Identifier: 568294DD-CA8E-4085-873B-3257BA4C452C

CrashReporter Key: 1943f278e2b2c12f279863025d9ea7fdafd0d049

Hardware Model: iPhone8,2

Process: bluetoothd [409]

Path: /usr/sbin/bluetoothd

Identifier: bluetoothd

Version: ???

Code Type: ARM-64 (Native)

Role: Unspecified

Parent Process: launchd [1]

Coalition: com.apple.bluetoothd [117]

Date/Time: 2017-10-14 14:22:28.8194 +1100

Launch Time: 2017-10-14 14:19:30.2236 +1100

OS Version: iPhone OS 11.0.3 (15A432)

Baseband Version: 4.00.01

Report Version: 104

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000058

VM Region Info: 0x58 is not in any region. Bytes before following region: 4298784680

REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL

UNUSED SPACE AT START

--->

__TEXT 00000001003a4000-000000010076c000 [ 3872K] r-x/r-x SM=COW ...n/bluetoothd]

Termination Signal: Segmentation fault: 11

Termination Reason: Namespace SIGNAL, Code 0xb

Terminating Process: exc handler [0]

Triggered by Thread: 6

Filtered syslog:

None found

Thread 0 name: Dispatch queue: com.apple.main-thread

Thread 0:

0 libsystem_kernel.dylib

0x0000000181b70bc4 0x181b70000 + 3012

1 libsystem_kernel.dylib

0x0000000181b70a3c 0x181b70000 + 2620

2 CoreFoundation

0x000000018201fce4 0x181f36000 + 957668

3 CoreFoundation

0x000000018201d8b0 0x181f36000 + 948400

4 CoreFoundation

0x0000000181f3e2d8 0x181f36000 + 33496

5 CoreFoundation

0x0000000181f8d12c 0x181f36000 + 356652

6 bluetoothd

0x00000001003b4e4c 0x1003a4000 + 69196

7 libdyld.dylib

0x0000000181a62568 0x181a61000 + 5480

Thread 1 name: StackLoop

Thread 1:

0 libsystem_kernel.dylib

0x0000000181b91150 0x181b70000 + 135504

1 libsystem_pthread.dylib

0x0000000181ca6d78 0x181ca2000 + 19832

2 bluetoothd

0x00000001003ed9a8 0x1003a4000 + 301480

3 libsystem_pthread.dylib

0x0000000181ca432c 0x181ca2000 + 9004

4 libsystem_pthread.dylib

0x0000000181ca41f8 0x181ca2000 + 8696

5 libsystem_pthread.dylib

0x0000000181ca2c38 0x181ca2000 + 3128

Thread 2 name: RxLoop

Thread 2:

0 libsystem_kernel.dylib

0x0000000181b75108 0x181b70000 + 20744

1 bluetoothd

0x00000001003d9520 0x1003a4000 + 218400

2 libsystem_pthread.dylib

0x0000000181ca432c 0x181ca2000 + 9004

3 libsystem_pthread.dylib

0x0000000181ca41f8 0x181ca2000 + 8696

4 libsystem_pthread.dylib

0x0000000181ca2c38 0x181ca2000 + 3128

Thread 3 name: TxLoop

Thread 3:

0 libsystem_kernel.dylib

0x0000000181b91150 0x181b70000 + 135504

1 libsystem_pthread.dylib

0x0000000181ca6d40 0x181ca2000 + 19776

2 bluetoothd

0x000000010049d42c 0x1003a4000 + 1020972

3 libsystem_pthread.dylib

0x0000000181ca432c 0x181ca2000 + 9004

4 libsystem_pthread.dylib

0x0000000181ca41f8 0x181ca2000 + 8696

5 libsystem_pthread.dylib

0x0000000181ca2c38 0x181ca2000 + 3128

Thread 4:

0 libsystem_pthread.dylib

0x0000000181ca2c2c 0x181ca2000 + 3116

Thread 5:

0 libsystem_kernel.dylib

0x0000000181b91dbc 0x181b70000 + 138684

1 libsystem_pthread.dylib

0x0000000181ca2fb0 0x181ca2000 + 4016

2 libsystem_pthread.dylib

0x0000000181ca2c30 0x181ca2000 + 3120

Thread 6 name: Dispatch queue: com.apple.bluetooth.lowenergy

Thread 6 Crashed:

0 bluetoothd

0x00000001006c2dec 0x1003a4000 + 3272172

1 bluetoothd

0x00000001006b6598 0x1003a4000 + 3220888

2 libdispatch.dylib

0x00000001819fd048 0x1819fc000 + 4168

3 libdispatch.dylib

0x0000000181a05ae8 0x1819fc000 + 39656

4 bluetoothd

0x00000001003bf998 0x1003a4000 + 113048

5 bluetoothd

0x00000001003bb08c 0x1003a4000 + 94348

6 bluetoothd

0x00000001003b8294 0x1003a4000 + 82580

7 libxpc.dylib

0x0000000181cde300 0x181cd9000 + 21248

8 libxpc.dylib

0x0000000181cdbcb0 0x181cd9000 + 11440

9 libdispatch.dylib

0x00000001819fd118 0x1819fc000 + 4376

10 libdispatch.dylib

0x0000000181a138b8 0x1819fc000 + 96440

11 libdispatch.dylib

0x0000000181a06d00 0x1819fc000 + 44288

12 libdispatch.dylib

0x0000000181a14534 0x1819fc000 + 99636

13 libdispatch.dylib

0x0000000181a06d00 0x1819fc000 + 44288

14 libdispatch.dylib

0x0000000181a077d8 0x1819fc000 + 47064

15 libdispatch.dylib

0x0000000181a08200 0x1819fc000 + 49664

16 libdispatch.dylib

0x0000000181a104a0 0x1819fc000 + 83104

17 libsystem_pthread.dylib

0x0000000181ca2fe0 0x181ca2000 + 4064

18 libsystem_pthread.dylib

0x0000000181ca2c30 0x181ca2000 + 3120

Thread 7:

0 libsystem_pthread.dylib

0x0000000181ca2c2c 0x181ca2000 + 3116

Thread 6 crashed with ARM Thread State (64-bit):

x0: 0x0000000100b16bd0 x1: 0x000000016fc863e8 x2: 0x000000016fc863e8 x3: 0x0000000100b16bf0

x4: 0x0000000000000000 x5: 0x0000000000000000 x6: 0x0000000000000000 x7: 0x0000000000000060

x8: 0x0000000000000010 x9: 0x00000000000000a6 x10: 0x0000000100846c20 x11: 0x0000000300000007

x12: 0x0000000100846c20 x13: 0x000001a1b2a51c19 x14: 0x00000000ffffffff x15: 0x000000000000001f

x16: 0x00000001b2a37ea0 x17: 0x00000001815ab0d8 x18: 0x0000000000000000 x19: 0x0000000100b16bd0

x20: 0x0000000000000000 x21: 0x0000000000000000 x22: 0x000000016fc863e8 x23: 0x0000000100b1fd60

x24: 0x0000000100b1fd60 x25: 0x00000001007a1648 x26: 0x0000000000000000 x27: 0x000000016fc86440

x28: 0x000000016fc86440 fp: 0x000000016fc862d0 lr: 0x00000001006c2de8

sp: 0x000000016fc86220 pc: 0x00000001006c2dec cpsr: 0x60000000

Looks like 11.2 did the trick for my iPhone 8+ in conjuction with my car's Kenwood and a couple Plantronics headsets. No more random disconnects during business calls.

However, I must say this experience forced me to evaluate Android devices. I had an older Nexus 5X and also found a Black Friday LG G5 for $200 (w/ expandable microSD storage up to 2TB). Android has certainly bridged the gap closer to the performance and stability of iPhone at a fraction of the price. Once we're ready to retire our iDevices, we'll be looking elsewhere unless Apple comes down in pricing. Doesn't make sense to spend a grand anymore even with subsidies. There's only so much you can do to improve the phone. iPhone X features are nice, but after about 5 min, was perfectly fine reverting to an 8 plus.

Cheers-

After about a week of testing, I am happy to say my iphone 8 no longer has this issue. The fix was a long time coming, but the last update ( now on ios 11.2) seems to have done the trick for me.

I have a 2009 Audi car here in the UK.

As soon as I get the chance, I will try on another car too.

Very pleased!

My iPhone 6S suddenly and consistently drops Bluetooth music player connections within 5-25 minutes, including three of our cars, two different wireless speakers, and our Samsung home theater system. Some devices are able to automatically re-pair/reconnect, but many are not. What a nuisance, I find myself searching for a viable music player. The problem is not correlated with incoming sms/mms messages, phone calls, timers, alarms or background email downloads. The problem even occurs when all apps except iTunes on the phone are off, and when wi-fi and cellular services on the phone are toggled off.

It's a symptom of an iOS software update quality assurance problem at Apple, which we base on last week's Support Case where the Advisor and then the escalated Sr. Advisor finally has us disable 'Notifications' in Settings before re-applying iOS 11.2.1. Imagine having to be manually assisted by Apple support techs to apply Apple software updates to Apple products to overcome software defects. The case required eight hours of over-the-phone troubleshooting spanning four phone calls and two calendar days.

after installed ios 11.1 official, i dont have this issue anymore, my sony bluetooth speakers are all fine by now. i've tested for 30 mins and nothing happened, everything is fine IMO.