6s wifi issues with Devolo dLan 500

Hi
,
I live in an old house with thick walls so have to extend my AirPort Extreme
network with some powerline wifi repeaters from devolo (dLan 500 WIFI).
I find that when my iPhone 6s is connected to one of the devolo devices I am getting shockingly slow downstream wifi speeds compared to my wife's 5c and an old 5s. See the attached photo for a test using the Speedtest app, at the same time from the same location, all using the latest iOS. I can repeat these results every time, as you can see the 5c and 5s are getting 25-30mbps downstream yet my 6s only manages 1, rarely getting even as high as 2mbps. All have similar upstreams.
I can't pin down exactly when it started, but it never used to be this noticeably slow.
I had a broken screen replaced at Apple a couple of months ago and it's definitely been an issue since although I can't say it wasn't slow before.
I don't see any wifi performance problems when i am close enough to my AirPort Extreme for it to use that and don't seem to experience any issues with public wifi or at friends/work etc.
I'm at a loss for what's happening here but it's basically rendering my iPhone almost unusable on wifi when at home which is obviously quite frustrating.
Does the iPhone use different antennas for upstream and downstream? Could my screen replacement have introduced this issue?
I've tried obviously restarting and resetting to defaults the devolo devices and forgetting the network and resetting network settings on my iPhone but still get the same results.
Cheers
Rich

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Posted on Nov 13, 2016 11:25 AM

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Posted on Feb 1, 2018 5:39 AM

I have the same Problem and found out, that if you turn off your bluetooth in your iOS Settings (completely), it works fine.

If BT is turned on = 0,5 - 1,0 MBs

If BT is turned off = 35 MBs


Hope it helps

28 replies

Nov 17, 2017 4:14 AM in response to DanRugfoot

That's good to know.


I am pretty sure as well that there is nothing on the router set up/components that can adversely affect how a DLAN Wifi transmits. So I agree, its purely how the DLAN500 transmits.


Also I have connected the devices directly onto the Ethernet port of the DLAN500 and its OK.


As I mentioned, Windows and Android devices connect to the DLAN500's very well.


Also I am pretty sure that the Apple devices that don't work with the DLAN500 now, used to work well before. I am not aware that the Devolo units have had a firmware upgrade since then, whereas the iPhones have had loads. Its been a problem for me since Nov 2016, so which ever iOS was applied then is probably the culprit. I know my ex also has problems with her iPad, but I don't know details and I do not have one to test.


It is very frustrating as I recommended this brand specifically for the good reputation that it had!! It is very strange that Devolo play dumb on this problem.


At my own home I use Zyxel and that has no problems at all. I have never seen this with any wireless brand before.

Nov 17, 2017 4:25 AM in response to DanRugfoot

I have been wondering about the variation of components on iPhones and iPads. You could imagine that there would be and that the iOS relies on the hardware firmware following guidelines so that the Apple programmers could get consistent behaviours on their devices. This could affect the connectivity stability as well as other issues banded about, like battery life...

Feb 5, 2018 9:36 AM in response to hugo1235

Same thing here. BT on/off doesn't change anything. Interesting thing is, that it is only one IPhone 6s, all other devices work properly. And on this device it is recognizable, that watching youtube is ok, but even the apple-store or downloading new ios-update didn't work at all.

Definitely no issue to ISP or to Devolo device in general. Only in combination with particular IPhone 6s plus new iOS (probably, because it used to work fine for months).

Jul 1, 2017 2:17 PM in response to dutts303

Hi Rich,

Did you solve this problem, as I have exactly the same issue that you have with the Devolo dLan 500, right down to the fact that my wife has a 5 and gets full speed whilst I'm getting under 1mbps. If I move the powerline adaptor to a different socket my iPhone 7 will often connect at full speed, but within minutes, it's back down to under 1mbps. It was the same with my previous 6s phone. It's as though there is something in the iPhone software causing it, or something in later iPhones that is not compatible with the Devolo units.

Cheers,


Geoff

Aug 18, 2017 9:37 AM in response to Xley3

I have the same issues with the Dlan500 Wifi. I have spoken to Devolo who cannot advise any solution and even got them replaced, thanks to their customer service, but I still get the same problem.


Symptoms are that I get maybe 20% of the full speed initially and then it decays to 0.5-1 mbps speed (using Speedtest). As a result, the signal often drops out and I lose connectivity altogether.


I can connect my other devices (android phones, tablets, Amazon Fire, windows laptop, Windows surface) all successfully to the Dlan500 wifi, but the iPhone 6s plus will not. I have even changed the base homeplug (from Devolo Duo to Zyxel) and even changed the router in case it was that, changed the SSID, removed all encryption, changed the channel. Still the same problem.


I can connect the iPhone 6s plus to either of my routers and I get full stable speed.


Some of my friends Apple devices also have this problem, but not all.


The only thing I can conclude is that there are some Apple devices which just do not work with the Dlan500 wifi.


It is really frustrating as both the Apple and the Devolo are premium priced products!

Mar 13, 2018 4:37 AM in response to hugo1235

Hi Hugo,


I've just purchased the TP-Link WPA4220 AV600 powerline adaptors but have found that whilst speeds seem much improved on my iPhone when Bluetooth is enabled, the actual reliability to my router is poor and it keeps dropping out. I've also noticed it on my laptop which is connected via Ethernet and if I run a speed test, I can see it shoot up to 24Mbps but then drops back down to 0, and then up again - it's unstable and not as reliable as the Devolo in my house unfortunately, which means it's going back to Amazon.


That means I need to stick with Devolo for now, but I have opened a support ticket with them to ask what's going on and if they know the cause/solution. I'll update here when I get a response. But for everyone else, the TP-Link/non-Devolo option is probably the recommendation for now.


Interesting to hear that it's also an issue with iPhone X - must be a Devolo thing with the wireless radios.


Jonny

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6s wifi issues with Devolo dLan 500

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