topic Re: WiFi is extremely slow in Z Series

WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 17:07:16 GMT

I have an Xperia Z5 Premium and I am having a terrible experience with the wifi connection. Able to connect with no problems and it stays connected but the speed is ridiculously slow. I have a 10mb connection and if I run a speed test I get .01mb of speed, have tried different tools to measure and all show similar results while I can test with a PC, iPad and a Samsung S7 and I get a normal speed result on those of 10-11 mbps. This is really annoying because it obviously doesn't let me use Remote Play because of the speed and when it connects it is impossible to play.

I have already rest the device to factory settings and it didn't help, also tried the Software Repair from PC Companion and it didn't help either.

Something to note, I once got an error saying that the wifi couldn't start while it was already started andnI had to restart to get it on again.

What can I do about this?

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 17:10:28 GMT

I should also say that if I turn off the wifi, I get an excellent speed from my mobile carrier and up to 35mbps speed result on the tools mentioned.

Re: WiFi is extremely slow

Uliwooly — Sun, 05 Jun 2016 18:08:05 GMT

@JorgeMoreno92

could you download speedtest and test the connection?

Re: WiFi is extremely slow

Phy — Sun, 05 Jun 2016 18:09:28 GMT

Do you experience the same in safe mode?

How to boot on safe mode
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

How to boot on safe mode on Lollipop
1. press and hold the power key
2. once you get the pop up menu
3. press and hold "power off"
4. Boot on safe mode should become available

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 18:19:46 GMT

Justo did, also tried speedof.me/m which is a tool that uses only html5 and both throw the same results only on wifi .01 - .8 mb randomly.

Re: WiFi is extremely slow

Uliwooly — Sun, 05 Jun 2016 18:20:38 GMT

@JorgeMoreno92

try @Phy's suggestion and report back.

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 18:37:32 GMT

I am in safe Mode right now and I just run a couple tests and I AM getting nos much difference. Got .89 and .36
I used speedof since the apps are not available now. Still getting 35mbps when I am in Mobile data.

Re: WiFi is extremely slow

Uliwooly — Sun, 05 Jun 2016 18:49:46 GMT

@JorgeMoreno92

while in safe mode, could you forget and re-add that router?

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 18:56:45 GMT

I just did, and same behavior. Throwing .36 of speed.
I should mention that this happens in any WiFi connection. I hace access to my neighbor's network and ir shows pretty much the same result while he has 5mbps of speed
I know his speed since I get it with my pc.

Re: WiFi is extremely slow

Uliwooly — Sun, 05 Jun 2016 18:57:52 GMT

@JorgeMoreno92

This is odd, I can't recreate this with my Z5P, not sure if you are up for it, but you could downgrade with flashtool/xperifirm to test it.

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 19:14:42 GMT

I Washington hoping this Washington a known isquemia ir tiene Washington a setting ir something. I guess I am alone in this.
Do yo have some sort of guide to do it?
I guess I can try later this week

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 19:15:45 GMT

Haha, I was hoping this was*

Re: WiFi is extremely slow

Uliwooly — Sun, 05 Jun 2016 19:40:46 GMT

@JorgeMoreno92

/t5/Xperia-Z2/How-to-manually-update-downgrade-root-2014-Xperias/td-p/593459

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 19:45:08 GMT

Thanks, I'll keep you guys posted. Thanks again!

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 21:19:59 GMT

Hey guys,

Just adding some more information. While still experiencing slow internet on apps(YouTube, remote play, Spotify) that stream online or even the browser(chrome) I notice that the Play Store is downloading considerably fast, I started to download Need For Speed and noticed the progress was moving pretty quick, I was able to count 10 seconds to get 10Megabytes downloaded so I calculate that speed is actually 10 megabits per second.
Everything else is still working extremely slow just play store is downloading fast... any ideas?

Re: WiFi is extremely slow

DCUK — Sun, 05 Jun 2016 21:31:04 GMT

Try connecting to a 5GHz WiFi network and see if you get the same issue.

Also, if you can't do that, try connecting to a bluetooth device (such as a fitness device, smartwatch, or bluetooth speaker or headset) and see if your network speed comes back up.

I've got three Android 6.0.x phones here from three different manufacturers (one of them is the Z5) that has these kinds of slow WiFi issues that you mention and using either a 5GHz network or connecting to a bluetooth device (I connect to a Microsoft Band 2) tends to "fix" the problem. Very strange.

Re: WiFi is extremely slow

JorgeMoreno92 — Sun, 05 Jun 2016 22:08:30 GMT

@DCUK
OMG man, that is a ver good observation and you are totally right. I just connected to a speaker and tested again and the speed went up to 10mbps. Like you said, this is very strange , I wonder if we just need to learn to live with this!

Re: WiFi is extremely slow

JorgeMoreno92 — Thu, 09 Jun 2016 16:21:12 GMT

Hey Guys, just adding a new finding.

Looks like the problem is being caused by interference of my home phones which are also in 2.4Ghz. Whenever I am having problems I just disconnect the phone and just like that, the speed is back up instantaneously.

The doubt that I still have is why only on 6.0 Android

Re: WiFi is extremely slow

Yarko4 — Tue, 24 Jan 2017 05:16:55 GMT

I FOUND THE ANSWER!!!

I was having the same problem. Very slow loading videos on Facebook App, and Youtube App. Chrome navigation was slow but not that bad as Youtube and Facebook.

What I found is that my router was transmitting in CHANEL 11 which apparently doesn´t go well with the phone because other devices and PC´s were completely fine, just this little expensive and not so good phone had problems with that. Even a Samsung cheap smartphone loaded videos with no problem.

So back to the solution, I tried looking for the option of GHz to switch between 2.4 to 5 GHz on the options of my modem but couldn´t find it so reading an article I decided to try the channel. I switch from eleven to 6 and nothing really change, but at the beginning, it seemed to improve just a bit. Still looking for some real change I went and try channel 1. Omg, as soon as that modem restarted, all the apps and videos were flying as they should, no stop, just loading way way faster, you didn´t even wait for anything in none of the apps mentioned before.

So apparently this phone can´t handle interference very well, and it works better on some channels.

Re: WiFi is extremely slow

Martin20 — Tue, 24 Jan 2017 05:59:25 GMT

you'd find because of channel overlapping...channel 1 would most likely be the best channel to obtain the fastest speeds because there is less overlapping channels, especially from your neighbours etc etc.

its always a good idea to use apps/programs such as inssider to figure out what wifi channels are being used in your area.

youll find that most routers which are set to auto (for wifi channel)tend not to pick the best one.