Database Users

Wifi Connectivity Issues

My new galaxy s4 I9500 has been working fine until 2 days ago when the wifi started reconnecting every few seconds. I'm not sure what the problem is and I cannot find a solution for this. I have read the issues with the D-Link routers however I use a Netgear router and all devices except the galaxy s4 can connect fine without any issues. It started happening after my phone automatically updated to version: I9500UBUAMDK, but I am not sure if it has to do with software.
If anyone else is having the same problem or has a solution, please help me through this issue, thanks.

Anyone? It's the only problem I am currently facing with the phone and is a major problem for me as i use Wifi at home all the time. Please help me solve the issue and I'll be so happy!

i have also problem with my dlink 2640b and i found solution for me
you need to go to wierless settings and chosse CHANAL 13
and in option where you can chose wifi speed ( like b only, b and g mixed, only g ) chose G only
after that i don't have any problem with my s4
i also have security off

gjokic said:
i have also problem with my dlink 2640b and i found solution for me
aou need to go to wierless settings and chosse CHANAL 13
and i option where you can chose wifi speed ( like b only, b and g mixed, only g ) chose G only
after that i don't have any problem with my s4
i also have security off
Click to expand...
Click to collapse
Thank you for the reply, and yes I have read that this problem is mostly on D-Link routers and that there are many fixes for that, however I am currently using a Netgear router which I haven't heard many people having problems on, so there are not so many fixes out there for that. Thank you for the reply though, I will continue to look for a solution.

B3AstLyBLitZ said:
My new galaxy s4 I9500 has been working fine until 2 days ago when the wifi started reconnecting every few seconds. I'm not sure what the problem is and I cannot find a solution for this. I have read the issues with the D-Link routers however I use a Netgear router and all devices except the galaxy s4 can connect fine without any issues. It started happening after my phone automatically updated to version: I9500UBUAMDK, but I am not sure if it has to do with software.
If anyone else is having the same problem or has a solution, please help me through this issue, thanks.
Click to expand...
Click to collapse
Try changing the channel width to 20Mhz. After I did that the reconnecting issue was gone on my D-link router, but as you've read at 54g speeds. I can now stream video to my TV without it stopping. I am contemplating buying a new 802.11ac router to connect at 433Mbps as my D-link is too slow for my broadband now. I hope that helps.
Sent from my GT-i9505 using xda app-developers app

Deus_ex11 said:
Try changing the channel width to 20Mhz. After I did that the reconnecting issue was gone on my D-link router, but as you've read at 54g speeds. I can now stream video to my TV without it stopping. I am contemplating buying a new 802.11ac router to connect at 433Mbps as my D-link is too slow for my broadband now. I hope that helps.
Sent from my GT-i9505 using xda app-developers app
Click to expand...
Click to collapse
Changing Wifi channel width from 40 MHz to 20 MHz solved wifi dropping and reconnecting problem for me also. I have Asus RT-N16 with latest updates. Also on my SGS4 has latest updates, stock android 4.4.2.
I used Wifi scanner, and there should not be any interference with my Wifi station. I have channel 1 and my neightbour has channel 7 Wifi. Wifi signal is also strong for my router. I was wondering how this can be possible, as any other device had not dropped connections @40 MHz widht, BUT a brand new Galaxy S4 GT-I9506 drops it withing minutes again and again?

[Q] help wifi won't connect after upgrading to 4.3

Hello,
I'm hoping someone can suggest a fix, yesterday I upgraded to 4.3 using adb. I'm fully stock not rooted. today for some reason it won't connect to my home network. It's a cisco e2500 router and its on the 5ghz band. I tried setting different channels, turned off optimization....
what gives???

imoumni said:
Hello,
I'm hoping someone can suggest a fix, yesterday I upgraded to 4.3 using adb. I'm fully stock not rooted. today for some reason it won't connect to my home network. It's a cisco e2500 router and its on the 5ghz band. I tried setting different channels, turned off optimization....
what gives???
Click to expand...
Click to collapse
If i connect to the 2.4ghz band it works fine... wth

Seems like there is an issue with your router. Did you change anything recently in the router setting? Try restarting the router.
Sent from my Nexus 4 using Tapatalk 4 Beta

I had immediate problems with Wi-Fi after updating as well, I don't know what the new radio features but it turned out that a firmware update to my router had everything running smooth as butter again, actually better (a lot more reliable–YouTube app actually appears to buffer noticeably less and not break up, for example, downloads also initiate and complete more solidly) than it was under 4.2.2
ASUS RT-N66U

Nothing changed on the router i tried rebooting it also my Mac is still working fine
Sent from my Nexus 4 using Tapatalk 4 Beta

Could my radio be corrupted?
Sent from my Nexus 4 using Tapatalk 4 Beta

Tried sideloading again no help
Sent from my Nexus 4 using Tapatalk 4 Beta

Bueller?
Sent from my Nexus 4 using Tapatalk 4 Beta

I have the same problem, since the update to 4.3 does not connect to the 5Ghz band.
I'm back to 4.2.2 and not connect, does it damage my hardware nexus 4?

Hmm interesting
Sent from my Nexus 4 using Tapatalk 4 Beta

jujogeek said:
I have the same problem, since the update to 4.3 does not connect to the 5Ghz band.
I'm back to 4.2.2 and not connect, does it damage my hardware nexus 4?
Click to expand...
Click to collapse
I'm using an Asus AC66U at home and N66U at my office with no 5ghz connectivity issues.
Here's some things that might help you troubleshoot. Start by disabling the "avoid poor connections" feature in WiFi options. Install inssider or similar WiFi scanner to see if there is interference for your specific router config. Try removing the WiFi connection from your phone and reconfiguring.
Sent from my Nexus 4

comminus said:
I'm using an Asus AC66U at home and N66U at my office with no 5ghz connectivity issues.
Here's some things that might help you troubleshoot. Start by disabling the "avoid poor connections" feature in WiFi options. Install inssider or similar WiFi scanner to see if there is interference for your specific router config. Try removing the WiFi connection from your phone and reconfiguring.
Sent from my Nexus 4
Click to expand...
Click to collapse
Hi,
It's strange I have a similar problem. After upgrading to 4.3 my 5ghz connection came to a crawl. We are talking about 1.2-1.6 Mbps. But the 2.4 ghz was fine (35 Mpbs). Once I downgraded, re-writing the "radio" file, then the 5ghz connect was blazing fast again (50 Mbps). I'm convinced this has to do with the "radio" update, but I'm not sure what exactly.
Any suggestions? Currently I'm back on 4.2.2 as wifi speeds (PA rom) make more sense right now.
Thanks in advance!
-d

comminus said:
I'm using an Asus AC66U at home and N66U at my office with no 5ghz connectivity issues.
Here's some things that might help you troubleshoot. Start by disabling the "avoid poor connections" feature in WiFi options. Install inssider or similar WiFi scanner to see if there is interference for your specific router config. Try removing the WiFi connection from your phone and reconfiguring.
Sent from my Nexus 4
Click to expand...
Click to collapse
I tried all of the above, every combination, reset my router, there are no other 5ghz overlapping networks, at this point it is something to do with my install. I wonder if a factory wipe would help...

That's my exact setup (E2500' did you set the Wi-Fi frequency band to 5GHz only on the N4 and give the band a different SSID from the 2.4 GHz network?)! Try forgetting the current connection and setting it up again.

stevemw said:
That's my exact setup (E2500' did you set the Wi-Fi frequency band to 5GHz only on the N4 and give the band a different SSID from the 2.4 GHz network?)! Try forgetting the current connection and setting it up again.
Click to expand...
Click to collapse
yes the names are different, keep in mind the setup was working absolutely fine pre upgrade...

imoumni said:
yes the names are different, keep in mind the setup was working absolutely fine pre upgrade...
Click to expand...
Click to collapse
I'm pretty sure it's not your router setup and the radio upgrade, as I mentioned earlier. Try going back to stock 4.2.2 and see if you can connect
Sent from my Nexus 4 using xda app-developers app

Im not rooted should i just flash the 4.2.2 image?
Sent from my Nexus 4 using Tapatalk 4 Beta

d00ds said:
I'm pretty sure it's not your router setup and the radio upgrade, as I mentioned earlier. Try going back to stock 4.2.2 and see if you can connect
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
If it were the radio software specifically, then logically 5ghz would be broken for everybody, which is not the case. Perhaps the issue is device data specific... There has to be a better solution than staying on 4.2.2.
Sent from my Nexus 7 using Tapatalk HD

I have with wifi problems too, but with 4.3 and 4.2.2 version. At home everything works fine, but at work phone connect to router, but no Internet (internet work only 1-2s). Other devises with this router works fine!

I have even a different issue. The phone is stuck at Obtaining IP Adress every time now. I downgraded to 4.2.2 and it's still doing the same thing. It does work if connected to a different router, but not to my main one. I haven't changed any router settings either.

Help weird Wi-Fi Problem

Hey guys
I have my Oppo Find 5 X909 and even though I am very happy with it there is one weird problem that I'm facing. When I connected my phone to Wi-Fi it connected to the router via the Wi-Fi repeater and it worked perfectly. But then one day the repeater was turned off and i connected directly to the router and even though it showed me that it connected succesfully I couldn't do anything that required internet. For instance i tried surfing the web with my Chrome app and it showed me a DNS problem which is weird because all the other devices in the house work just fine whether they're connected directly to the router or via the repeater. I tried restarting the router and making the phone forget the settings and readding them with no results.
I checked the official Oppo Find 5 forum and found that noone else was facing with such a problem and I have no idea where to look for the answers. I would really appreciate it if anyone could help me with the problem.
PS: my phone is running the latest Color ROM international build but I noticed the problem also on the newest official international ROM. Also the phone is unrooted

No such problem for me. I'm on latest Color ROM as well :-/
Sent from my Nexus 7 using Tapatalk 4 Beta

For some reason updating the router firmware fixed the problem. Thank you for the reply nonetheless
Sent from my X909 using xda app-developers app

I'm having the same problem. Also only with one AP in my network. When the problem appears, no other device can access the internet through this AP. Sometimes even my wired PCs can't get access to the network.
My workaround is to try to always connect to my other AP.
I'm on CM 10.1 Nightlies. The AP is a Linksys WAP610N

[Q] Kit Kat Wifi Issues

With 4.2.2 I had no issues with wifi and can still go back to that version and have no issues, but with version 4.3 and 4.4 I have had and still have the following problem.
I have a list of known wifi connection points as well as available access points. Everything appears as it should, but the wifi will not automatically connect to any wifi (protected or unprotected/known or previously unknown) without first turning the wifi off and back on. Additionally, this only works if the persistent background wifi option is toggled off. If I do toggle the wifi on and off and connect to an available access point everything is fine so long as I remain in range and stay connected. If I go out of range and lose the connection, when I next reenter the range and the access point shows up on the list it will not connect unless wifi is cycled on and off. This happens every single day at work and home, although there is a workaround, it is quite annoying to have to cycle the wifi off and on. The networks will show as available and if I click on them and try to force it to connect, it still won't work unless I cycle on and off.
I have seen prior threads with this issue on 4.3 and there was a topic in the official Google issues page and was frankly hoping desperately that 4.4 would fix it, but alas, it has not. I know it is not the device itself since reverting back to 4.2.2 solves the problem.
Does anyone know of a permanent fix to this wifi issue that doesn't involve reverting to an older version of android or some kludged together solution?

Ya.. I have also been facing this problem since i have installed KitKat 4.4 on my i9300

Are you stock? Maybe try another ROM? I had the exact same problem, but my problem was my wifi AP.
1- My router was setup for a/b/g/n, I set it to only what I really had using the Wifi AP, which was g/n
2- I had a weird cable modem to router to Wifi AP setup. The router was handing out IPs, not the Wifi AP. I removed the router and only let the Wifi AP give IP addresses (DHCP). It seemed like the "further hops" away that the DHCP addresses were, the more issues i had with my Android connection.
No other devices on my network had these issues, but doing the above made a world of difference.
All that made my connections lightening quick, no issues at all since then.

odd Wifi behaviour
I got a refurbished delivered N10 last evening, came with 4.2.2, played with it a little, did a network benchmark test (FTP off a LAN NAS) and was getting comparable peformance to my other fastest system (a Thinkpad Ubuntu laptop). It seemed stable but I only used it for like an hour as 4.2.2. I was getting FTP of max 4MB/s over a N-router.
I then let it OTA to 4.3 and then played with it for some hours. Issue I found was the Wifi would work and then have "authentication problem" I had to turn Wifi off then on to make it connect to router. I've had that issue with other devices at times. I was thinking of staying on 4.3 to allow 4.4 to have another bugfix (its not been long out on N10) but I had a key issue for me (PPP Widget didn't work) so I did a stock 4.4. flash upgrade.
On 4.4. the Wifi speed is still fast, but periodically it just stops working, a glitch.
One key thing that stands out is the N10 is connecting at much higher Mbit speeds than any other of my devices, it is showing 130Mbits vs say 20-65Mbits on other devices. I'm wondering if my N10 is "too good" for my router an old low-spec refurbished model (Cisco E1200 v2, which I flashed to latest DD-WRT) ?
I'm not so far disappointed with network performance, just network stability, but I can't tell for sure if its the N10's fault or my router's fault. I'll play with settings a while til I find something stable.

When I first got my N10 I had a lot of trouble with wifi connection. Mostly authentication issues, or it would authenticate but not have internet access. It was frustrating, and Google's support was clueless.
I then tried using wireless tether from my N4 and it worked as it should. The issue ended up being the Arris router that Time Warner uses. I bought a Linksys router and have had 0 issues since. So if you're using an Arris router, or it shares the same chipset, that might be the issue.
The router is the Arris DG860.

Ichiban Rei said:
When I first got my N10 I had a lot of trouble with wifi connection. Mostly authentication issues, or it would authenticate but not have internet access. It was frustrating, and Google's support was clueless.
I then tried using wireless tether from my N4 and it worked as it should. The issue ended up being the Arris router that Time Warner uses. I bought a Linksys router and have had 0 issues since. So if you're using an Arris router, or it shares the same chipset, that might be the issue.
The router is the Arris DG860.
Click to expand...
Click to collapse
Good anecdote.
Well in our house, the proliferation of gadgets has changed progressively to a large number, I make it 14 devices from an initial 2 devices 5 years ago. I count 4 wired and my 4 devices, my son's 2 and my daughter's 3 and my wife's 1. They all compete for router bandwidth, Wifi spectrum, router CPU / cache.
What I might do with this high-performance (capability and demand N10) is segment my network using an old G router I hard fix to non-overlapping channels from N-router, and connect the low-spec devices to the G and high-spec to the N. That will involve no $ and naturally reduce congestion. I run a NAS and download media to it and then stream to gadgets off NAS so I'm Wifi-limited often more than Internet-limited, and even tweaking I get 2MB-4MByte (16Mbit~32Mbit) off a NAS is making my typical LAN speed the same as the Internet bandwidth I buy (16Mbit).
My NEtbook (EEE 1015PN) if it ever felt a Wifi hiccup it would lock-out that frequency and so not see the router til I powered off netbook and remove battery.
I do wonder if some of the N10 Wifi complaints are really just generic or bad combinations with router or "straw that broke the camel's back".

I'm having wifi issues with my N10 as well. I had a few wifi issues at work, but not at home while using 4.3. Now with 4.4 I'm having serious wifi connection issues both at work and at home. In fact my N5 running 4.4.1 is having issues connecting to wifi both at work and at home. Not as often as my N10, but it still happens. I'm running stock on both and have no problem connecting to either network with my laptop.
I've installed wifi fixer, but so far it doesn't seem to be helping much. Does anyone have any suggestions on what might be done to fix this that doesn't involve rooting either device?

I'm now running 4.4.2, and I'm experiencing better wifi connectivity, but it still drops out more than it did on version 4.3. Is anyone else having this issue?
Sent from my Nexus 10 using Tapatalk 4

droidfan77 said:
I'm now running 4.4.2, and I'm experiencing better wifi connectivity, but it still drops out more than it did on version 4.3. Is anyone else having this issue?
Sent from my Nexus 10 using Tapatalk 4
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Click to collapse
I'm in the same boat, more drops in 4.4.2 than on 4.3 and I'm running stock

same here...waiting for a fix

experiment with the router
metzner said:
same here...waiting for a fix
Click to expand...
Click to collapse
Some of your problems might be just coincidence, something changed in your area around the same time as you upgraded. Some of these are just the wrinkles of firmware of device vs firmware of router, some combinations work bad and isn't really "fault" of Android in that you can't test every combination. You could wait for a fix from Android... or just try to avoid the wrinkle by changing settings on the router. A common thing is to move the router from auto to fixed channel and fix to 20mhz narrow. Go the place you mostly are with the N10 and use a Wifi analyser to find the least-congested channel and then set the router to that. What that does is reduce channel-hopping and gives less opportunity for firmware issues on both router and the Android device.
I also had a problem with my N7 when I moved house. The answer was to flash DD-WRT on my router and the problems went away.
So either wait+complain or go look at your router now.
Right now I have DD-WRT on an old refurbished Cisco E1200 and I set it to channel 3 with 20mhz and I got very good Wifi performance. With the stock Cisco firmware I was getting Android Wifi drops and poor performance. Yes, that's partly Android's fault but I fixed it myself quicker flashing firmware on the router.
I also took opportunity in DD-WRT to setup IPTABLES for a transparent proxy so all the devices in my LAN now share a large harddrive as http cache so e.g. any downloads from Play store for say my N4.... is cached to my N10 so I only ever download anything once.
If you have issues still with the N10, then what I find solves a lot of problem is do a stock flash of 4.4.2, on setup untick all the backup+restore from Google, then manually install and configure yourself to make it "vanilla". That often fixes accumulated wrinkles unique to your history of your device and places to more mainstream with less likely of having a unique problem. I do that on all my Android devices now (N4, N7, N10).

Similar wifi problems here
I've had similar issues with my N10.
I will have fast internet speeds (30+ Mbps) and it will just freeze. I'll be watching youtube and it will start buffering. Doing a speed test on my phone shows the speeds as normal. It makes no difference whether connected to 2.4 GHz or 5 GHz wifi.

I just resolved my WiFi issue this past weekend. Connectivity is rock solid
Here is what I did I.
Purchased my own cable modem/router. New router had updated firmware. time warner cable modem did not.
Change beacon interval from 100 to 20 on router and repeater.
Made sure router was on a less congested channel.
All is rock solid
YMMV

bflatmajor said:
I just resolved my WiFi issue this past weekend. Connectivity is rock solid
Here is what I did I.
Purchased my own cable modem/router. New router had updated firmware. time warner cable modem did not.
Change beacon interval from 100 to 20 on router and repeater.
Made sure router was on a less congested channel.
All is rock solid
YMMV
Click to expand...
Click to collapse
Great! Often just tweaking settings can do wonders. I flashed DD-WRT on mine and it solved a lot of issues on an old low-spec router.

Hey Guys,
I posted this in General section but saw this so I will add this info:
I just want to share what and why I did it. First off I did not have problems with my wifi on 4.2.2 with the Nexus10. the second that I went to Slim Kat and Vanir 4.4.2 I had weak wifi signal at work and at home when my nexus 7 slim kat and my galaxy note 2 Vanir did not. I noticed that RAM was also weird on the nexus 10. Even though it showed 2gb of ram on the specs it was only showing 1099 on 4.4.2 when I show that I have 1647 ram available with 4.2.2.
Concerning the OS using Ram. Google said that they would make Kit Kat more RAM friendly but I was using 535mb of RAM for 4.4.2 and right now I am showing only 357.3 mb for 4.2.2. I am using the same apps launchers and screen savers
I just flashed back to 4.2.2 this morning so I will update later, I do see an improvement in the wifi though.
I just want to say that I love Slim Kat and that is why I am on the 4.2.2 I just think Google somehow hosed up the wifi on the Nexus 10.
B][/B] Ok so I am at work and have went back and forth between 4.4.2 and 4.2.2. the 4.4.2 connects and disconnects back and forth. When it does connect to router but it says poor connection and it is only 24mbps. "It drops way more than connected" I am 45 ft from router in an open environment.
The 4.2.2 Slim Kat has a fair connection with 78 Mbps and has not dropped once. So I don't know what the difference is with Kit Kat compared to Jelly Bean but for my nexus 10 my wifi is great now with Jelly Bean. I wish I could figure out why and fix but I do not know programming.
I also installed on both 4.4.2 and 4.2.2 a app called WiFi Connection Fixer *Root* by ZEXTR. It did not help 4.4.2 but it did help with 4.2.2. this app helps connect to poor connections or when Android says avoided poor connection.
I don't know why the Nexus 10 is having issues with wifi with KitKat but I wish I could fix it. So I will be on 4.2.2 until a new version comes out and I will test it to see if it fixed it.
update; I have used 4.2.2 all day with the wifi connection fixer and I have not dropped wifi once and the download speed is fast. It is much faster than what 4.4.2 was, at least on my tablet.
Joe

Nexus 10 4.4.3 WiFi Bottleneck Problem
Hello there everyone,
I just wanted to confirm that I personally found a fix on my end for my Nexus 10 WiFi bandwidth problem that was definitely evident for many people that upgraded from 4.4.2. First off, I'm totally stock. I will most likely root & ROM this thing in this near future. I was having a bottleneck on my Nexus 10 around ~2 mbps when I tested using the speedtest.net application (may not be the best measurement application but it works). I ended up fixing the problem by changing my router settings in the WiFi section of my browser based software to N/G Mixed instead of just Mixed (which allows 802.11a/b as well as 802.11g/n to run on the router's WiFi signal). I use DD-WRT on my router as well so that may have played a factor in it but I did NOT see an increase in bandwidth until making the N/G Mixed change in the settings. I found this suggestion earlier in the thread and wanted to give it some credit. Thanks everyone!

SM-N910C 5Ghz WiFi Issue - no Internet connection

My router is Tp-Link Archer C20i working at dual bands 2.4 and 5 GHz. I bought it two days ago and the first day I brought it home, my Note 4 (SM-N910C) connected to it at both bands without any issues, providing me with a stable connection to the Internet. Yesterday, the problems started with the 5GHz band. My phone connects to the 5GHz network successfully, but it all ends there. I cannot access neither the setup page of the router, nor the Internet at all. The 2.4 GHz band works really well in comparison. I hadn't changed any settings, nor installed any apps.
Now my laptop, iMac 2008 and tablet Note 10.1 2014 edition work just awesomely well with the 5GHz band. I've browsed various sites and forums on the Internet and a similar problem seemed to have plagued both Galaxy S4 and Note 8, but the solution was to adjust the date and time. My phone doesn't have any issues with screwed up time and/or date.
I'm running the latest version of Lollipop 5.0.1, stock, no root. I've now tried to both downgrade back to KitKat and upgrade the phone to various firmware versions (and countries') to no avail. I've also upgraded my router's firmware to the latest version - it also didn't work.
Anyone stumbled across anything remotely similar? I appreciate any input.

komorka said:
My router is Tp-Link Archer C20i working at dual bands 2.4 and 5 GHz. I bought it two days ago and the first day I brought it home, my Note 4 (SM-N910C) connected to it at both bands without any issues, providing me with a stable connection to the Internet. Yesterday, the problems started with the 5GHz band. My phone connects to the 5GHz network successfully, but it all ends there. I cannot access neither the setup page of the router, nor the Internet at all. The 2.4 GHz band works really well in comparison. I hadn't changed any settings, nor installed any apps.
Now my laptop, iMac 2008 and tablet Note 10.1 2014 edition work just awesomely well with the 5GHz band. I've browsed various sites and forums on the Internet and a similar problem seemed to have plagued both Galaxy S4 and Note 8, but the solution was to adjust the date and time. My phone doesn't have any issues with screwed up time and/or date.
I'm running the latest version of Lollipop 5.0.1, stock, no root. I've now tried to both downgrade back to KitKat and upgrade the phone to various firmware versions (and countries') to no avail. I've also upgraded my router's firmware to the latest version - it also didn't work.
Anyone stumbled across anything remotely similar? I appreciate any input.
Click to expand...
Click to collapse
I had this problem too, but I fixed it by turning off the wifi power saving mode and rebooting.
Did you try turning off the wifi power saving mode in *#0011# --> WiFi(top right) --> Toggle ON/OFF. Then reboot.