Level 1

21 points

Very slow wifi when bluetooth is enabled since iOS 10

Hi all,

since the update to iOS 10, the download speed of my wifi (2.4GHz) on my iPhone is very slow when bluetooth is enabled.

When checking my connection speed using the speedtest-app, I get around 5000kB/s with bluetooth disabled and around 50kB/s with bluetooth enabled. In fact, I can see my download speed drop instantly when enabling bluetooth during the test and increasing when disabling bluetooth. The iPhone is connected to an Apple Watch via bluetooth.

Upload speeds are unaffected and stay constant at around 300kB/s (limit of my connection).

My iPad connected to the same network (also running iOS 10) does not show this behavior.

I called Apple Care support and they told me to rest my network settings and reset my router which I did. This fixed the problem only temporary; one day after the "fix" the old behavior returned. Now they are telling my the only option might be a reset of the iPhone to factory defaults which I would like to avoid.

The issue started with the update to iOS 10 and did not disappear after upgrading to 10.0.2.

Anyone else experiencing this issues or any clue on how to fix this?

Thank you!

iPhone 6s, iOS 10.0.2

Posted on Sep 27, 2016 10:45 AM

33 replies

jay_ary

Level 1

4 points

Dec 12, 2017 11:23 AM in response to adamdavi3s

Thanks for your support. I was quite desperate when I noticed this issue on my new iphone. I recognized bad wifi speed and I did not know why. This discussion brought me to the idea, that there are issues with the bluetooth

Dec 23, 2017 5:38 AM in response to steveadamsgm

Hi Steve,

Yes this is correct, now imagine you have an iPad Pro with a pencil and an iPhone 8+ with an Apple Watch and imagine how annoyed I am!!

It’s much more prevelant on the iPad and means I end up having to re pair my pencil every time I want to use it.

I’ve sent the latest set of logs to the engineers so it’s a waiting game now

Dec 28, 2017 6:57 AM in response to alvarodrigo

My problem is certainly worse at home. And I've seen others report the same. But I see a small impact at work (where download speeds go from 100 Mbps to 90 Mbps.) Not sure why.

Apple is busy selling other devices I'm sure. They are surely aware of the bug, but either cannot fix it, or it is not important enough for them to fix in front of other bugs. What is important to us is not necessarily important to them.

Steve

Oct 26, 2017 7:37 AM in response to matthias__

Same here.

I only noticed as my iPad pro drops to 8mbps from 68 when bluetooth is on.

My iphone 8+ drops but to 30 which is why I hadn't noticed the issue prior to getting the ipad

Oct 27, 2017 11:51 AM in response to matthias__

confirmed this issue is only with 2.4ghz wifi networks

mtflud

Level 1

4 points

Nov 21, 2017 6:07 AM in response to adamdavi3s

Thanks for the heads up! Please keep us updated!

Dec 17, 2017 10:16 AM in response to adamdavi3s

Sorry correct call number: 100333169042

Feb 23, 2018 2:01 PM in response to adamdavi3s

Unfortunately mine was down to using a different speed test. Ookla reports everything is fine whereas google appears to report the correct result.

Back to the drawing board

Jan 9, 2017 3:55 AM in response to matthias__

Hi,

I am encountering the same thing. My download drops to roughly 10% of the speed that I have without Bluetooth enabled. This is very annoying and I am 100% sure I did not have this before iOS 10.

To be fair - my iPhone 5S also shows this - but my iPad Air 2 doesn't. My wifes iPhone 6 shows it as well, but not in the same extent. It drops the download speed to roughly 70-80% of the supposed speed.

Anyone solved this yet ? Any statement from Apple so far ?

Thanks, Philipp

matthias__ Author

Level 1

21 points

Jan 11, 2017 1:46 AM in response to Philipp_1975PB

Apple replaced the screen under Apple Care (that's where the antenna is) - it looks like this has solved the issue for me (I have to note, however, that I also switched the router and did only limited testing in 2.4GHz as the new one now supports 5GHz-Wifi).

Oct 27, 2017 10:47 AM in response to Henrik_Scheel

I have this on my ipad which hasn't ever been connected to a watch.

Below are my tests from this evening, note the bluetooth symbol if it isn't obvious!

This is after a FULL restore of the ipad from recovery mode

Oct 2, 2016 3:02 PM in response to matthias__

You at least got me this far. I have been messing with this for hours and when I came across this; I turned off my Bluetooth and BOOM my wifi is back. With my Bluetooth enabled I get basically nothing on my download speed and my upload is completely unaffected. Hope they fix this soon!

I also have an Apple Watch and want my Bluetooth enabled even at home.

Oct 2, 2016 5:51 PM in response to Austin1985

I would also like to add that I try changing channels on my wifi and I reinstalled iOS 10 and then a restore with no such luck.

Nov 22, 2016 1:56 PM in response to matthias__

Hi There,

since very recently I started noticing the same issue. When enabling Bluetooth, the WIFI drops to 0.4Mbps and without Bluetooth 48Mbps. I tried forgetting en reconnecting wifi networks, resetting network settings and nothing worked.

I also have an apple watch. I tried putting the watch in airplane mode and enabling Bluetooth on iPhone (with no devices connected) and still wifi speed is dropping.

Now I just updated to iOS to 10.1.1 but it did not fix the issue.

Next steps:

try resetting without deleting (No success)

try update to 10.2 beta (public beta)

try complete reinstall of iphone

call helpdesk

I will update the progress

May 8, 2017 9:06 AM in response to matthias__

Did you find a solution. I have same issue.

Kind Regards, Henrik Scheel

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Very slow wifi when bluetooth is enabled since iOS 10