yashsingh1/xdaforums huggingface dataset:
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I compared my ZUK with my nexus 5 with wifi dead spot app.

When putting hand behind the top of phone, reception highly decreases.

Same thing with all phones I guess. I read same issue with iphone6.
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
That is not the main problem. The problem is that with the ZUK, WiFi connection has serious issues when you are far from the router, at a distance where every other phone has no problems to reach good speed connections.

Closer to the router the performance of the ZUK is great. But we need the phone to keep connected even if we are a couple of rooms appart from the router. Or does anyone install WiFi routers in the bedroom or bathroom? We all know how important is to have a good internet in the toilet...

The thing with puting the hand over the top part of the phone gets important because when you are around the limit of the small distance that the ZUK allows you to keep good speed, some times you just get disconnected because of having the phone horizontal (maybe watching some youtube video) while grabing it with both hands (thus covering the top part with your left hand, usually...).

With other phones it probably happens in the same way , but at a bigger distance from the router.
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I was about 15 meters from router un both cases.

And i had good réception with ZUK, even better than nexus 5
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
Nice. Ok...

Do you have any walls between the router and that spot? It would be great if you could test your speed connection. It has been reported by other users, and myself, that some times apps like Wifi Analyzer give good signal, but the phone has very slow internet speed.

In my case I have tested the Nexus 4 and the ZUK with OOKLA Speedtest App.

My internet connection is cable at 100Mbps. When I´m sitting in front of the router the ZUK reaches 90Mbps and the Nexus goes up to 35-40 Mbps.

In my bed, 15 meters appart from the router, and a couple of walls in between, the Nexus 4 has perfect navigation, and reaches about 10Mbps in the test. But the ZUK doesn´t even Ping half of the times, and when it does gets lower values than 500Kbps.

I really hope they can fix it, because otherwise it´s a great phone.
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I have an internet connection that reaches around 10Mbps. That's also what reports my internet box logfile. So the internet speed that I should reach with wifi between any device and my box is maximum 10Mbps.

I used the ookla speedtest : in front of the router, i have 10Mbps and wide away after 2 rooms (15m), also 10Mbps.

But ookla speed test is dépendent of the internet bandwidth. So we should find a tool that analyses the bandwidth of the wifi only.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
I have the same symptoms, which are that now my Zuk is connected to 4G while my Nexus 4 is connected to my wifi either 2.4 or 5 GHz.

The thing about covering the mobile seems to be widespread to all mobiles, even though in my case at least I get a drastic destruction of the wifi that doesn't seem to be the common decrease. However, I have just received a case and it improves the situation.

But the thing of having a wrong wifi reception compared with other theoretically worse mobiles, right now for me it is like having a mobile without wifi. This is a deal breaker.
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
Ok, so there is something in your device/WiFi configuration that is different from mine. It´s good to know that not everybody has the same problem so we can maybe find a fix.

I wish I had 10Mbps in my bedroom with the ZUK. That would be more than enough. For me your test is good, because the people that are having the issue don´t even get a connection at that distance from the router.

Is your WiFi the only one around without others that could make interferences? It might be an interference problem, as others have reported better connection when they select a chanel that is less crowded.
[Zuk Z1 Q&A, Help & Troubleshooting] tuatara42:
By now I have speeds between 26-38Mbps throughout the property when tested with WiFi deadspot. However ookla speed test gives me a pretty constant 10Mbps. No matter how near or far from the router I am. I had both apps run one after the other several times at several locations just to make sure. That's quite weird. Is Ookla limited in its free version to 10Mbps? (Broadband speed is definitely faster so that wouldn't be any issue)
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
Wifi deadspot measures the speed of the communication between your phone and your router. Your network speed.

Ookla speedtest measures your Internet connection speed.

Two different things. To me it sounds like your Zuk works very well and you are not suffering from the issue most of us have here.
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I have only 3 other wifi around. At work, it works also as good as my nexus 5. I will check next week if there are other wifi around my work and if it could be an interference problem.
[Zuk Z1 Q&A, Help & Troubleshooting] tuatara42:
Not anymore. Not since changing the router channels. How exactly does WiFi deadspot work? Where does it get its data from that are sent from the router to determine data transfer to the phone?

I am aware that ookla measures the internet speed. But that does not equate neither my actual internet speed on the phone, nor are there any fluctuations really it's always 10Mbps. That would equate to 1.25MB/s without any overhead factored in. When I download, actual speed is more like 2.5-3MB/s. More curiously, when I completely cover the corner and force wifi down to 2.5-5Mbps according to wifi deadspot, ookla still tells me 10Mbps. That is rather unlikely? So something does not add up with ookla. Or do I have something completely wrong here? Does ookla just test server to router and not server to phone?
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
It does sound like you're ookla is a bit dodgy. You could try to Uninstall and install again. Or simply leave it Uninstalled. There are plenty of apps that will do the same.

---------- Post added at 08:50 AM ---------- Previous post was at 08:38 AM ----------

I have just received this link from tomtop

https://mega.nz/#!RFUw2CbZ!GXS6KeOy_8n2y_rOBJUS5WJSP5kchODcGUF0U1TxYO8

The claim it will fix the wifi problem.

It seems to be a new build of cyanogen os.

Can anyone try this? I would love to be the Guinea pig but I will not be anywhere near wifi until tomorrow the earliest and 740 mb is a bit much for my 3G.

---------- Post added at 08:53 AM ---------- Previous post was at 08:50 AM ----------

Oops, the above should have been it's own post. Here it is.

I have just received this link from tomtop

https://mega.nz/#!RFUw2CbZ!GXS6KeOy_...ODcGUF0U1TxYO8

The claim it will fix the wifi problem.

It seems to be a new build of cyanogen os.

Can anyone try this? I would love to be the Guinea pig but I will not be anywhere near wifi until tomorrow the earliest and 740 mb is a bit much for my 3G.
[Zuk Z1 Q&A, Help & Troubleshooting] Franco Banco:
And did you try it already???????:cowboy:
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
Mega link is aking for a key in order to desencrypting the file.could you share it?
[Zuk Z1 Q&A, Help & Troubleshooting] Frankie73:
OK folks, I can't compare the ZUK to a Nexus 4 but I can compare with my Nexus 5. Here we go:

1: Right in front of the router: (left Nexus 5, right ZUK Z1)

2: On the other end of my apartment, 3 thick walls between phone and router:

3: On the street in front of my apartment (I live on the second floor):

As you can see, the Z1 has better WiFi reception than the Nexus 5. It's very obvious on the 3rd test. Of course I always used the same server for all the tests.

And also I can confirm that my Z1 does not disconnect WiFi when idle. It always stays connected. Maybe fixed in the latest Cyanogen update?
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
I just got near wifi. I am downloading now. Didn't get a key?

---------- Post added at 04:00 PM ---------- Previous post was at 03:04 PM ----------

So I've got the file now and have not been asked for a key. Sorry for my ignorance, but does anyone in here know how to install an update via a zip file?
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
Well, that's definitively not my case. I have compared again the ZUK and the Nexus 4, and 1 m from the router they are or similar or the Nexus 4 seems better, but I'd say it is masked by the variability.

But, I have started walking away from the router, the Nexus 4 didn't loose speed while the Zuk very fast got really bad signal to eventually lose it.

So, the fact that some users here confirm they really have good wifi makes me think I have a faulty unit, so I think I'm gonna return it. Tomtop has offered me to do so.

EDIT: what is curious is that I perfectly see the 5GHz signal (when in another room) but the signal is lost every n minutes, and when I try to connect it I cannot (even though the strength is high). The Nexus 4 doesn't have any problem with this. I've been trying to change the channels but no difference.

*I have to say, about covering the mobile with the hand, now that I'm using a case this issue is mostly either gone or partially softened
[Zuk Z1 Q&A, Help & Troubleshooting] tuatara42:
Could it be that the new COS version is not signed? I get errors with both twrp and cyanogen recovery.

adb reboot edl didn't work for me either - just reboots - otherwise I would have tried the QDloader to flash it.
[Zuk Z1 Q&A, Help & Troubleshooting] deejaycarras:
Edl mode:

1- Power off the phone, with phone powered off, press vol. + and plug the phone on usb.

Enviado desde mi Z1 mediante Tapatalk
[Zuk Z1 Q&A, Help & Troubleshooting] IceDBear:
I have been testing WiFi today again and the previous problems seem to have gone away... I think the problem was when I was first testing the phone was not on the latest COS version yet and it downloaded the system updates in the background messing with the measurements.
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
What exactly is your current version called?
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
mine (I have very bad wifi range) is 12.1-YOG4PAS38J, it's weeks after the last OTA update, I assume that's the way it is
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
Exactly the same here. Haven't worked out yet how to install the os that tomtop sent me.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
What is curious is that if I analyse the wifi signals (with for example "Wifi Analyzer"), I do see my 2.4 GHz as the strongest wifi signal with -50/-60 dBm, and the 5GHz as the unique signal and with a strength as well good of -50/-60 dBm. The latter is actually stronger but, however, it appears and disappears. I cannot connect to the 5GHz, and if I connect to the 2.4GHz, today I've been able to surf but yesterday I didn't and the mobile ended up turning to 4G data.

So the thing is that the 5GHz signal is equal or stronger than the 2.4GHz, but it comes and goes ,and the ZUK is indeed not capable to connect to it (in this room) while the nexus 4 can. With the 2.4GHz sometime it can connect, but speed is much worse than with nexus 4 (at this distance). But this doesn't correlate with the ZUK measurements of signal strength, the ZUK does see the wifis, it just cannot make good connections.

Can it be a software issue with this description? I'm asking because I don't know whether to return the device or not
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
Every post you write about the behavior of your phone describes precisely what my phone does. Of course nothing even close to Frankie's results.

I have been thinking that it might be an interference problem and people living in most populated areas with lots of WiFi signals would then suffer the issue while others seem to be OK. That would explain why changing to fixed channel can make things better.

I'm now writings from a friend's house where there are only 2 WiFi signals within reach. I get much better speed connection than at home, where the number of WiFi routers my phone detects is countless (well over 20).
[Zuk Z1 Q&A, Help & Troubleshooting] Sblast:
Any replies from Zuk official?
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
They are aware of the problem but claim that it's a Cyanogen issue because ZUI rom (the chinese version) works OK.
[Zuk Z1 Q&A, Help & Troubleshooting] Sblast:
Can you please link to their reply? Screenshot perhaps

Well, this is their Facebook page:

https://www.facebook.com/profile.php?id=100010011609056

And official email for support:

support@zuk.hk
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
ZUK is the one who build the phone. So even if it is a cyanogen problem, ZUK must solve the problem.
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
Some users in the HTCmania spanish forum got that reply from them but I don't have a link. I do have a link to a spreadsheet that they sent to one of them comparing WiFi in both ROMs

https://www.dropbox.com/s/lldbfjilvqw0hoh/Z1WIFI测试对比.xls?dl=0
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
I don't get what they compare ... did you reach a conclusion with this graph plus communications?

update: I've read the spanish forums, so the last CM doesn't solve the problems, but sometimes it seems that the situation is better. This made them think this is software-related. My guts tell me this is gonna be a problem that will not be solved anytime soon, but that will be eventually solved.
[Zuk Z1 Q&A, Help & Troubleshooting] dp12776:
I also have exactly the same problem as you and Gerardgerard. But I am having the problem in my house where I would never detect more than two or maybe three wifi signals. And on other channels. I don't think interference is the issue here.

Anyone work out how to install the software from tomtop?
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
The forum is this

http://www.htcmania.com/showthread.php?t=1089575&page=3

and they published a tutorial to install it, here

http://www.htcmania.com/showthread.php?t=1090287

I'm gonna translate it (God, I am heavily procrastinating here)

1- Download the needed package to do all the process (the one that includes qfil-usb drivers-english guide, even though it doesn't specify the last step that is the crucial one)

https://mega.nz/#!sU1HVByY!lgM5Ba931GpBS7ozGBdvC8PiOxuv5W-ecHlC8L6iXso

2- Download the ROM for QFIL that you'll be installing, right now there're 3 (AFAIK): cyanogen, flyme OS y ZUI OS.

Follow the tutorial that is in the archive, but it could be summarised saying

- forget doing the cmd stuff (remember, the mobile is always disconnected from the pc)

- install the USB drivers

- install the QFIL software and start it, drop the files as mentioned in the guide (unzip the ROM to get the files) and once you have everything ready

- shutdown the mobile

- and the KEY STEP, once totally turned off, press volume+, then without unpressing it connect the phone to the computer, and then the software will detect the mobile and you can click downloaded. When the process starts and the bar gets blue, THEN you can unpress the volume+ and that's it.

*I've translated some things that I don't really understand, so don't be rude here
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
Anyway I wouldn't bother. It doesn't fix the WiFi problems and you risk bricking your phone.

From the spreadsheet I just get the conclusion that they are really looking into it. But nothing else. Performance is not very good in either of the ROMs and it seems that the WiFi speed they tested is quite slow...

The same user that created the guide to flash ROMs tried the ZUI ROM and thinks it does have the same problems as cyanogen. Not good, I know.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
Maybe someone want to try Marshmallow?

http://www.60marshmallow.co/2015/10/lenovo-zuk-z1-7511.html
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
That is fake. Don't do it.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
Jesus Christ, phishing is becoming very good indeed :eek:
[Zuk Z1 Q&A, Help & Troubleshooting] mahumi:
Hi, Frankie, You are lucky.

Can you tell us the settings of your router?

- Fixed or automatic channel

- Working frequency

- Encryption type

- ...

You can send us your sceenshot page , with the wifi router configuration.
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
I've been testing mine Z1 and i think that is very simple.Is not a question about poor reception or vertical or horizontal orientation,is a question about whether you put your fingers/hand convering plastic stripes .Everything in this phone is metal so I guess those stripes are the gates for comunication.

Try it.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
After using a plastic case, when I hold the phone the severe wifi drop has disappeared (or it seems so).

But yesterday in another home/wifi I tested nexus 4 vs zuk, a 2.4GHz wifi with pretty crowded environment. The zuk speed was 10x less than the nexus one, very disappointing.
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
what firmware are you using?

What configuration has that last router that you tested?
[Zuk Z1 Q&A, Help & Troubleshooting] Frankie73:
Hi!

My router is 2.4 Ghz only, my Z1 is set to "automatic" and encryption is WPA2-PSK. Not at home right now so I can't make a screenshot.
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
The last router I didn't have access. Mine (same situation) is:

TP-LINK TD-W8980, happens with both 2.4G and 5G, the latter suffering more as expected due to limited range

2.4G/5G

11n only, channel auto/others (currently 13 and 44 respectively), width auto, region spain

wps disabled/enabled

security WPA-PSK/WPA2-PSK (personal) with AES, tested as well without any security enabled, no difference

I have also tested using only 2.4G or 5G alone, and I've changed the ID to be sure only the ZUK was connected in case I had too many devices.

Nothing. No difference.
[Zuk Z1 Q&A, Help & Troubleshooting] Duke4d:
I have another issue, when the Bluetooth is on, the Internet over wifi is slow and unstable 1/2 of the full speed, when the Bluetooth is off, i have no issues what so ever and i get the full speed, I have the 2.4 Ghz wifi router. Can someone confirm this?
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
Try not 2.4g or 5g but automatic (2.4g + 5g)
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
I don't have this option. I can only activate one of the two, or both concurrently, but acting as independent wifis.
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
In htcmania z1 forum they says the same like me
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
Which stripes ? By the way, back cover is plastic, not metal. Only frame is metal...
[Zuk Z1 Q&A, Help & Troubleshooting] gerardgerard:
I'm reading that long thread, and I'm sorry to disagree with you
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
If back cover is plastic I`m totally wrong.

I don't know what else could be!!!
[Zuk Z1 Q&A, Help & Troubleshooting] sole_gemini:
Hello everyone, is the wifi on z1 really poor? Wanted to buy the phone but having second thoughts. Will a case solve the reception issues?
[Zuk Z1 Q&A, Help & Troubleshooting] csenga:
I've got no issue at all with the wifi. Actually, it is even faster then my old s4. Tested it a lot, and it does not have "critical" spot as shown before in this thread.
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
This is fromm today!

zuk hk/news/33

Please add . in the middle
[Zuk Z1 Q&A, Help & Troubleshooting] :
you are right: when the zuk connect to the wifi it reaches a higher speed that my old nexus-4;

but if you are at 10-12 m of the router, the phone loss the connectivity (not the connection with the router) and isn't capable to send/receive

what?
[Zuk Z1 Q&A, Help & Troubleshooting] PAPPAFRITAS:
even they say there is a wifi issue

You have to install an apk to send them an email with your id ,in order to coorect this wifi issue
[Zuk Z1 Q&A, Help & Troubleshooting] deejaycarras:
You send your DeviceID, and they send you a fixed OTA [emoji23] [emoji23] [emoji23].

I asked for sound fix too.

Enviado desde mi Z1 mediante Tapatalk
[Zuk Z1 Q&A, Help & Troubleshooting] Franco Banco:
Got a new update today......
[Zuk Z1 Q&A, Help & Troubleshooting] Sblast:
Did it fix the Wi-Fi issues?
[Zuk Z1 Q&A, Help & Troubleshooting] tuatara42:
That whole 'send us your device ID, we send you a fixed ota' business sounds kinda weird... Anyway, in case anyone did it, could you maybe post the ota file, please. Cheers.
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I get a new OTA yesterday without sending any device ID.

My version is now 12.1-YOG4PAS3AJ.
[Zuk Z1 Q&A, Help & Troubleshooting] tuatara42:
3AJ is the latest update. Over at the cyngn forum someone put a link to the official (?) Zuk site and an FAQ and some instructions. One of them is specifically targeted to people with WiFi problems. It basically claims that if you send your deviceID you would get unlocked for a specific update to fix the issue. Why they would need the device ID for that is beyond me...
[Zuk Z1 Q&A, Help & Troubleshooting] :
I have asked for that at zuk support...

No answer
[Zuk Z1 Q&A, Help & Troubleshooting] Atlantic7:
I´ve sent the Id and got an email asking for a Bug Log. Again sent the BUG log and then they asked for a video. I´ve sent a couple of videos of the good speed when closer to the router and the poor speed as soon as I get a litle further.

No special OTA for this problem. Last one (3AJ) did make connection a bit more stable but speed is slooow...
[Zuk Z1 Q&A, Help & Troubleshooting] :
I think Zuk has no idea on how solve the issue :(

My only doubt is to know if is a soft or a hardware problem (I pray to be a software problem).
[Zuk Z1 Q&A, Help & Troubleshooting] sole_gemini:
Want to buy the phone but sadly it has wifi issues :(
[Zuk Z1 Q&A, Help & Troubleshooting] Sblast:
Yeah, me too. Probably gonna buy a Mi4c now sadly
[Zuk Z1 Q&A, Help & Troubleshooting] man.jung.2015:
I have no issue with my ZUK. Could this be hardware related ? As my ZUK is a grey version, perhaps that matches with a more recent batch of hardware ?
[Zuk Z1 Q&A, Help & Troubleshooting] Captaincharisma:
Mine is grey, and I have the infamous issue with the distance, if I put the phone literally in front of the router, the speed is the best I ve seen in my house in any device (shield portable included), but if I leave the damm room: bam 2,80 mb (more or less) and virtually no upload.

I´ve also experienced the headphone cluster**** thing (the speed decreases even more when headphones are connected)
[Zuk Z1 Q&A, Help & Troubleshooting] Sblast:
Can you guys try flashing Exodus rom? see if it helps?
[Zuk Z1 Q&A, Help & Troubleshooting] djsubterrain:
Was looking at getting this phone but the reception problem is worrying, I know the ring around the phone is supposedly aluminium, could this be being used as an antenna and thus suffering from the old iPhone reception problem where users were told "you're holding it wrong" ?

Has anyone tried seeing if using a case improves the signal as you're not holding that metal or is it definitely a software problem?

Also, Have the people having problems tried using a WiFi Analyser to make sure the problem is not being caused by overlapping channels from other people's WiFi networks? If you are sharing a channel with another network which is stronger in the direction you are moving then this could cause the interference meaning your network is saturated by the other one and then your connection would drop in the way being described.

This could be why only some users are getting this problem.

Here's a couple of good WiFi apps for showing you all the networks in your area so you can see if you are overlapping another network and then try changing the channel on your network in your router settings to see if it corrects/improves the problem:

WiFi Analyzer : https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en_GB

WiFi Analytics : https://play.google.com/store/apps/details?id=com.pinapps.amped