Great. My download speeds are now too low to stream things on my Apple TV with 5ghz turned off so I’ve had to turn it back on, and now of course my Roam is no longer showing up in the Sonos app. 
What? 2.4GHz runs at least 30 Mbps, are you streaming five 4k UHD streams at the same time or something? No idea how 2.4GHz can be too slow for any video streaming. Xbox binary downloads, sure, I saw the difference there on a gigabit fiber connection, but video streaming should be fine.
I don’t know how crap the BT router is feature-wise (I could take a guess), but can you make a separate SSID for 5GHz and put your Apple TV on that, while leaving your Sonos gear and phone on the existing 2.4GHz SSID? You would not need to connect between the two wireless networks then, avoiding the broken code in the router.
Crappier than crap… you cannot split the SSID’s on the Smart Hub 2 nor set alternative DNS servers.
I’ve had the can’t find Sonos problem for a couple of weeks. Also problems connecting to my wireless Canon scanner printer
a very helpful tech support person from Sonos suggested going into the Smart Hub settings page, Advanced and changing Wireless Mode from mode 1 to mode 2. Rebooted Smart Hub and both my Sonos speakers and everything is back working (as is my scanner).
Time will tell if this is a permanent fix but it’s worked this evening
Read this thread with growing frustration as disabling the 5 GHz band really is not an option and waiting for BT to issue new firmware is too uncertain. Issue affects both Sonos Move and Epson airprinter - what was really strange was that both iPhones were hit but neither of the iPads despite the fact they all use the 5 GHz network. Will give this suggestion a try.
We’ve been experiencing the same frustration with this issue. I have now switched the 5GHz option off, which immediately sorted the problem. However, I agree with some of the comments. It can only be a temporary solution as the BT Smart Hub 2 is an upgrade. Therefore, it costs more money and we’re stuck in the contract till 2023! Also, it took a number of days for me to find this thread of communication online. So some transparency is needed so customers like myself know that this is a common issue.
Maybe this is a shoal of red herrings! ? I saw another suggestion to disable the “private address” under Wi-fi on iOS and this has cured the problem for me whereas putting hub into wireless mode 2 and re-setting router made no difference. Clearly BT need to sort the router firmware but if you can live with downgraded security, the iPhone “fix” seems to work.
Hi @phlash
I’m glad you got a fix, but that’s a completely different issue that results in the same symptom. In addition, not all Smart Hub 2 owners will have received the firmware update that caused the problems.
I have this issue - I can confirm a cable into a Sonos Arc means my 4x Sonos Play:1 devices now work and the whole system is much quicker.
It means I have a redundant Sonos Move which is incredibly frustrating. Turning off 5GhZ on the router is indeed a workaround but the WiFi speed was pathetically slow so this isn’t a solution.
Does anyone know if a Sonos Boost would resolve the issue?
I have this issue - I can confirm a cable into a Sonos Arc means my 4x Sonos Play:1 devices now work and the whole system is much quicker.
It means I have a redundant Sonos Move which is incredibly frustrating. Turning off 5GhZ on the router is indeed a workaround but the WiFi speed was pathetically slow so this isn’t a solution.
Does anyone know if a Sonos Boost would resolve the issue?
No, wiring a Sonos Boost would achieve the same effect that wiring any other Sonos player would. I do not suggest purchasing a Boost to work around this issue if wiring other devices doesn’t fix it for you. Move and Roam do not connect to SonosNet so wiring a Boost wouldn’t do anything that your Arc isn’t doing at the moment.
Hi @phlash
I’m glad you got a fix, but that’s a completely different issue that results in the same symptom. In addition, not all Smart Hub 2 owners will have received the firmware update that caused the problems.
Thanks (I think) but not really addressing the point that there are several clearly linked issues created by one or both the BT hub firmware change and the iOS upgrade designed to increase security and reduce tracking. How are people to fault trace if they don’t know all of the possible scenarios? Instead of responding individually it would be better if someone in a position to offer an overview could post a useful summary of where we are and what does/doesn’t work. Navigating one’s way through these conflicting accounts is not easy.
Hi @phlash
The BT Smart Hub 2 firmware update issue is only related to the Private Address on iPhones issue in the way that they both result in a Can’t Connect to Sonos situation. There are at least a dozen other things that also result in the same situation. This thread exists to explain to customers the details of this particular issue, but it doesn’t claim that every person with a Smart Hub 2 that Can’t Connect to Sonos is a victim of the firmware update - only those with the firmware version reported in the original post.
I have written a Troubleshooting Sonos on WiFi article - and I think I’ll now add the Local Network permissions and Private Addresses issues to that article as they do relate. Thanks.
I've been following this thread ever since I had issues. I have raised a complaint with BT as MacBook works fine, but app does not. Sonos tried to do a workaround but lasted an hour or so. I saw the post about the public/private. Switched it off on iPhone, instantly worked for the app. MacBook then doesn't work. The app then stopped working. Clearly there is both and issue with BT and the Sonos app for iPhone on this.
Still having trouble with this. My router is getting blocked despite following all the advice above and anything I could find online. I’ve got a man from BT ringing me during the week so I will report back what happens.
At least I’ve got Sonos working now even though it is at the expense of 5ghz
Hi all,
I believe I was one of the first to flag this issue up to BT around 3-4 weeks ago. Quite a long story how we got to the below but in short the way the issue was resolved for me was the below:
- factory reset all speakers.
- buy a sonos boost (BT refunded me the cost of this when I logged a complaint)
- Turn off 5ghz and install the boost followed by all speakers.
- ensure Sonos all working correctly via boost with 5ghz still turned off.
- turn on 5ghz again
- all fixed. Been running flawlessly for 2weeks now since running the system in this set up.
Three other work colleagues (all with BT) have since done the above and all their systems are working ok now also.
Yes, turning off 5ghz will also resolve the issue but my Wi-fi speeds went from 280mbps to around 60mbps so that to me wasn’t a solution I’d have been happy with.
Hi all,
I believe I was one of the first to flag this issue up to BT around 3-4 weeks ago. Quite a long story how we got to the below but in short the way the issue was resolved for me was the below:
- factory reset all speakers.
- buy a sonos boost (BT refunded me the cost of this when I logged a complaint)
- Turn off 5ghz and install the boost followed by all speakers.
- ensure Sonos all working correctly via boost with 5ghz still turned off.
- turn on 5ghz again
- all fixed. Been running flawlessly for 2weeks now since running the system in this set up.
Three other work colleagues (all with BT) have since done the above and all their systems are working ok now also.
Yes, turning off 5ghz will also resolve the issue but my Wi-fi speeds went from 280mbps to around 60mbps so that to me wasn’t a solution I’d have been happy with.
That’s great to here. I’ll ask my man at BT. I would still prefer to just hook my superior router . Although a free Sonos Boost sounds like a great thing. Thanks
Forgot to mention the third solution is hard wire a speaker to create the Network. This wasn’t an option for me however as my router isn’t near any of the speakers.
I think the key is to set it all up with 5ghz turned off then turn on when you are happy sonos is working correctly.
BT did originally try playing it down until the customer service advisor tried her system while on the phone and got the same error. Was quite easy to get the money credited to my account after that : )
My system keeps failing to connect to the app, I can connect it after turning everything off and the router back on, then the next day it can not connect again.
I too have just discovered this thread, having tried to sort things out for the last week. Whilst switching off the Private Address setting on my iPad gave a short lived reconnection, this too failed the next day. Most of the time my Mac would connect. I have got fed up trying to clear the problem using the instructions given by the app as has my wife! 
♀️
Having switched off the 5GHz band I was immediately reconnected and I have lodged a complaint with BT. Hopefully a further update will sort the problem shortly as I do not see why I should have to use a slower WiFi band in perpetuity. 
I may try the hardwired solution if things do not move fast.
I found only devices that left the house i.e my iPhone and my wife’s iPhone had the issue. Two iPads, a Mac book and a surface pro didn’t have the connection issues even when put in airplane mode or turned off and on.
To be honest the whole process of connecting 9 speakers was far easier through the boost than when I used to set up directly through the router so long term it’s made the Sonos adding speakers process better.
UPDATE
After raising a complaint with BT I had yet to hear anything from BT. So I decided to direct message them on Twitter. Almost instance response. The handler switched off 5ghz frequency remotely. Everything now works, so again it confirm the issue is with BT. This isn’t a viable long term solution though for me.
Well that didn't last for long!!
Changing Wireless Mode to 2 didn't fix the problem. Had to resort to switching off 5GHz
UPDATE
After raising a complaint with BT I had yet to hear anything from BT. So I decided to direct message them on Twitter. Almost instance response. The handler switched off 5ghz frequency remotely. Everything now works, so again it confirm the issue is with BT. This isn’t a viable long term solution though for me.
What the BT handler said to me when I questioned losing 5ghz
”
The 5 Ghz band is only faster than the 2.4 Ghz band when in the same room as the hub and this is only really above 135Mbps for most applications you would not notice any difference ,The 2,4 Ghz is a stronger signal penetrating walls etc. better”
I’m paying for faster broadband than 135Mbps and I expect full functionality of my BT smart hub. This complaint isn’t resolved for me. I shouldn’t have to have 5Ghz permanently switched off.
UPDATE
After raising a complaint with BT I had yet to hear anything from BT. So I decided to direct message them on Twitter. Almost instance response. The handler switched off 5ghz frequency remotely. Everything now works, so again it confirm the issue is with BT. This isn’t a viable long term solution though for me.
What the BT handler said to me when I questioned losing 5ghz
”The 5 Ghz band is only faster than the 2.4 Ghz band when in the same room as the hub and this is only really above 135Mbps for most applications you would not notice any difference ,The 2,4 Ghz is a stronger signal penetrating walls etc. better”
I’m paying for faster broadband than 135Mbps and I expect full functionality of my BT smart hub. This complaint isn’t resolved for me. I shouldn’t have to have 5Ghz permanently switched off.
I didn’t find this to be the case - with 5GhZ turned off my BT service was virtually unuseable.
BT have advised me this a fix should be out this week. They also advised if you are connecting to things like BT discs then you won't be affected (links into the boost post above). It’s only when you connect direct to the Hub.
UPDATE
After raising a complaint with BT I had yet to hear anything from BT. So I decided to direct message them on Twitter. Almost instance response. The handler switched off 5ghz frequency remotely. Everything now works, so again it confirm the issue is with BT. This isn’t a viable long term solution though for me.
What the BT handler said to me when I questioned losing 5ghz
”The 5 Ghz band is only faster than the 2.4 Ghz band when in the same room as the hub and this is only really above 135Mbps for most applications you would not notice any difference ,The 2,4 Ghz is a stronger signal penetrating walls etc. better”
I’m paying for faster broadband than 135Mbps and I expect full functionality of my BT smart hub. This complaint isn’t resolved for me. I shouldn’t have to have 5Ghz permanently switched off.
I didn’t find this to be the case - with 5GhZ turned off my BT service was virtually unuseable.
Yes it’s not ideal. My speed has dropped to 40Mbps on my wifi devices.
Hey everyone,
I have an update to share with you all regarding this issue.
BT have let us know that they are working towards pushing a fix to affected routers over the next 4-5 weeks. This will be rolled out in waves due to the high number of BT Smart Hub 2 units in customers homes, as well as making sure that the new firmware has no further issues and correctly resolves this problem.
