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Home WiFi connection problems

Hey world,
I'm having trouble with my Roger's branded Samsung Captivate SGH i-896's wifi. The phone is completely stock. When I connect to my wireless AP at home it doesn't seem to always work on the captivate... I had a htc magic before running all sorts of different roms and never had a problem like this before.
What happens is that I would connect to wifi at home and it would work, but if I leave wifi on the phone for an extended period of time and go back to the phone, wifi stops working.
It would show that i've successfully connected to my AP but no data would pass through my phone.
Disconnecting and reconnecting to the AP doesn't seem to work, the only way to fix it is to restart the phone. I'm not experiencing this problem with any of my laptops, netbooks or cellphones at home.
Security type is WPA2.
Is anyone else experiencing this problem? Anyone have an idea what could be causing this problem?

I have had this problem intermittently, So has my wife on her Captivate. No idea what causes it though. It's a pain because if WiFi is on, but not working, 3G doesn't kick in so apps just don't work.

my wife's captivate has this issue as well (but I don't on my captivate). It will work for a short period and then stop. We have a fios wifi router, not sure if that matters at all.
restarting the router and/or phone usually fixes the problem

mine is a linksys... hrnnn

I'm having the same problem on my new Captivate. Tried it on several different networks with the same results (shows connected but no data will transmit) before I took it back to ATT. They scratched their collective heads and rebooted (powered down and removed battery), which is a temporary fix, but its been working for two days now and I turn off WiFi unless I know I'm in range of a working hot spot.

I was having this same problem until I set my wifi policy to never sleep, dont know if it is a fix for everyone but it definitely fixed my problem.
Sent from my SAMSUNG-SGH-I897 using XDA App

Glad to hear I'm not alone!
I've been fighting with this issue for over a week now, it suddenly started occurring. I wonder if it was an app we all loaded that suddenly made this condition occur? If you look the phone is requesting an IP and if the IP given back by the router is the same one it already has the phone doesn't acknowledge that command. If the router is rebooted then a new IP is given, or what is considers new. This is a HUGE problem and I've put in some time looking at it, but one of the problems is that is comes and goes. What your router log and you'll the phone request an IP over and over again, all the while the router saying "here, take the same one you already have back".
If you use the app "Network Info II" you'll see the problem when it displays a "Device IP" at the top of 192.168.1.254 and WiFi IP address will be the correct one, in my case 192.168.1.108. When we have these two IP numbers showing differently the device is hosed. Rebooting will put them back in sync, but that is not the proper solution, we need to get to the bottom of this! I understand the WiFi IP address showing at the bottom but the "Device IP" I do not, why the difference? How can we affect the "Device IP", where does the device get that IP address?

Try the app called WiFi Fixer. That did the trick for me. There seems to be a bug of some sort that causes the phone to not release the IP address. Or you could use static IP but that worked only for a while.
Cheers.
Sent from my SAMSUNG-SGH-I897 using XDA App

the app doesn't seem to work for me.... =(

DKirk said:
How can we affect the "Device IP", where does the device get that IP address?
Click to expand...
Click to collapse
The phone gets the device IP from either the service provider (when using edge/3g), or from the router (when using wifi). If an IP address is not provided, it uses a default IP address, which is always outside of the standard private IP block.
There are two ways to assign an IP address: dynamically and via static IP address. Dynamic = assigned by the router, static = pre-programmed by you. I don't know if you can set a static IP address on a phone, as I've never tried it.

I had a zyxel wireless n router in my house and could never get the wifi to work on my captivate. If it did work it lasted 5 seconds... I was really pissed.
I was thrilled to see that buffalo is now back in the market and with dd-wrt firmwares... So I picked up the most expensive one they had for $89.99.
it has a dlna client built in as well as bit torrent, also lets you use a spare usb hard drive as a nas... things i don't know....
However loaded up the wireless settings in 2 minutes and voila... perfectly working on my captivate... I have also found that this router works flawlessly with G+N devices and it is gigabit. I was able to stream 1080p video from my synology 411+ to my ps3, download on the captivate and be on two other laptops at the same time without any issues... I am very very impressed with the buffalo.
Here is the product info.
buffalo nfiniti wireless n high power router and access point. WZR-HP-G300NH
ohh and my laptops are connected fully at 300 mbps with this router wirelessly...
very very happy with it.... Oh and forgot to mention... once this started working with the buffalo i noticed my batter was much better running on wifi all the time. Also wifi file explorer pro works flawlessly.. I was able to upload a 700 meg movie to my captivate wirelessly in about 2 minutes.

WiFi fixer did not fix my problem as well. After turning WiFi on the device IP remains 192.168.1.254 while the WiFi IP is correctly set at 192.168.1.108. When these two IPs are different WiFi does not work and WiFi Fixer doesn't appear to see any problems here.
The router here is an Asus RT-N16 running Tomato and I'm fairly confident that isn't the problem. This is more like an internal routing issue inside the phone.

I don't think it's brand of router that matters... maybe a setting on our routers can fix this...?

I've searched the internet to find a sol'n but it looks like this wifi problem is a widespread problem for almost all galaxy S devices... ppl have made temporary workarounds (ie. setting a static ip) but ultimately, there is no fix for this problem.... gg...

bigbrotherbear said:
I've searched the internet to find a sol'n but it looks like this wifi problem is a widespread problem for almost all galaxy S devices
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Click to collapse
It appears to go beyond Samsung Galaxy, I've seen the same issue with Nexus and Motorola Droids. VERY frustrating!

tylerdurdin said:
I was having this same problem until I set my wifi policy to never sleep, dont know if it is a fix for everyone but it definitely fixed my problem.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
I dont know why nobody even notice that answer !!!!
had same problem on my milestone .. it is not a bug , wifi goes to sleep , its the way your phone is set up ... as its quoted here set it to never sleep and make sure your not using soem kind of app that will overwrite that setting ( like battery manager that for example could turn off wifi to save battery)
very easy to double check once your wifi is not working , go in wifi settings scan and check the wifi access points you normally use you ll see its set to disabled ..
the bug is it doesnt resume like it should. or gets re-enabled however you wanna call it . just re-enable it voila ! no reboot needed .

I got it working!!
This may be my first post here, so be kind...
Running Cognition v2.3b3 and Linksys WRT54G router. WIFI was working fine until I flashed to Cog 2.2 Then I could only use WIFI tethering, no other WIFI connection would work.
I tried setting up static IP and setting sleep to never. Didn't work. Changed router security from WEP to WPA Personal and got it working.
Phone settings: Go to Wi-Fi Settings, click menu, and goto advanced. I don't know if all the settings here are necessary, but I'll post what I have.
Port = 80
Use statis IP = checked
IP address = 192.168.1.103 (check your router assignments for an open address)
Gateway = 192.168.1.1
Netmask = 255.255.255.0
DNS 1 = (check your router config. For my router it's located under the Status, then router tabs.)
Router settings: (Under the Wireless, Wireless Security tab)
Security Mode = WPA Personal
WPA Algorithms = TKIP
WPA Shared Key = (your access key used when you attempt to athenticate from your phone)
Group Key Renewal = 3600 seconds
Write the access key down so you can use it to reconfigure the other wireless devices on your home network.
Good luck,
Glen

changing my router fixed the issue.
I have wifi running on my captivate for 8 hours at a time at work now and at home. Not one hiccup or disconnect, works 100%.
99% of wireless routers are crap. I work in IT and have dealt with most major brands and had been running linksys wireless routers with dd-wrt on them...
if you got a spare 90 bucks.. go to your microcenter or place where they sell buffalo routers and pick one up. If it doesn't work.. you can return it.

This worked for me

Going to a static IP worked for a few hours and then it stopped working as before. WiFi is set to not sleep.
When I ran the router without security I did not have this problem and since adding WPA2 w/AES+TKIP the problem has developed. The iPod Touch doesn't have a problem with it, nor my laptop or wireless ipTV set-top box, only the Android. I'm leaning towards setting up another router without security, on a different channel, and see if the problem disappears again. Here in 2010 we shouldn't be having this issue, but look on other forums and you'll find similar complaints with other brands of Android phones, it's not a Samsung thing.

[Q] Major WiFi Problems...

I just got my 64gb G6 Edge and am experiencing major WiFi issues with the device. My devices wireless will disconnect randomly from a strong signal and I have personally observed it disabling and re-enabling the wireless by itself.
Also once disconnected it no longer sees ANY wireless networks no matter where I go even though it shows the "scanning" circle spinning and I know that there are strong known wireless networks by me. If I manually toggle the WiFi off and then on again, all wireless networks around me are detected again and if any of my known networks are present it will automatically connect. However after a period of time this connection will disconnect and I have to do the process over again.
I have already made sure that 1.) Smart Switch is turned off. 2.) Keep Wi-Fi on during sleep is set to Always. 3.) Always allow scanning is enabled.
I have also tried disabling the WiFi Power Save mode [*#0011# and click on more>>WiFi>>"WIFI Power save mode"] this too resulted in the same behavior.
I've only had this phone for a day and a half, not rooted, already cleared cache partition from stock recovery etc. I haven't tried a factory reset yet (not sure how much good it would do), but at this point is there anything else I should try or is the consensus I need to get my phone swapped out?
**Update** So upon extensive further testing it seems that my wireless issues are caused by issues connecting to the 5GHz band on wireless access points that use bandsteering in that both 2.4GHz and 5GHz use the same SSIDs. This is a MAJOR problem for me as I encountered this at my place of work and rely on wireless heavily not to mention my phone heavily for wireless testing. There are no "Advanced" wireless settings for selecting which band to use either.
I really need some suggestions in order to try and get this problem solved or I may have to switch to a crappier phone just to have functional wireless.

I had something like that happen too, but I only noticed it at home. My home network has both 2.4 and 5GHz using same SSID. I set my phone to use 2.4GHz rather than the deault setting "AUTO", now it seems to work. Shouldn't have to do that though, but maybe my home network isn't setup correctly. This is not device specific though, it happened on my old M8 and now on s6 edge. So it must be on my end.

-Apollo- said:
I had something like that happen too, but I only noticed it at home. My home network has both 2.4 and 5GHz using same SSID. I set my phone to use 2.4GHz rather than the deault setting "AUTO", now it seems to work. Shouldn't have to do that though, but maybe my home network isn't setup correctly. This is not device specific though, it happened on my old M8 and now on s6 edge. So it must be on my end.
Click to expand...
Click to collapse
I have no settings for configuring WiFi bands, where did you find them?
Sent from my SM-G925P using XDA Free mobile app

http://forum.xda-developers.com/galaxy-s6-edge/help/wifi-dropping-t3079504

rank78 said:
http://forum.xda-developers.com/galaxy-s6-edge/help/wifi-dropping-t3079504
Click to expand...
Click to collapse
Unfortunately I have already tried those options, what I am looking for now is the ability to manually select what wifi band 2.4 or 5GHz my phone uses automatically on the phone itself as Apollo stated he was able to do somehow.

Moguledyouth said:
Unfortunately I have already tried those options, what I am looking for now is the ability to manually select what wifi band 2.4 or 5GHz my phone uses automatically on the phone itself as Apollo stated he was able to do somehow.
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Click to collapse
I can only imagine he meant router settings because the S6 doesn't show that ability. Sounds like you have to get different SSIDs for your 2.4 and 5 bands.

rank78 said:
I can only imagine he meant router settings because the S6 doesn't show that ability. Sounds like you have to get different SSIDs for your 2.4 and 5 bands.
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Click to collapse
Moguledyouth said:
I have no settings for configuring WiFi bands, where did you find them?
Sent from my SM-G925P using XDA Free mobile app
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Click to collapse
Sorry guys, I was wrong. I upgraded from M8 to M9 last week. I had to change bands on M9, like on the M8. Didn't like the M9 so swapped out for s6 edge. I did not have to do this on s6 edge!
I had a brain fart..sorry for confusion, it was the M9.

This is what I have found out in my thorough testing on this. The S6 / S6 Edge have issues connecting to AC Wireless networks. Upon connecting the devices wireless connection to and AC Wireless access point or router it will become unstable and disconnect randomly and in my firsthand experience will not re-establish wireless connections at all until WiFi has been manually toggled off and then back on at which point the process I described above will begin again if connecting to any AC Wireless device.
A workaround for the moment for home personal routers is to separate the SSID's if they aren't already for both 2.4GHz and 5GHz and to use the 2.4GHz channel. This won't help however for all the places you cannot change that have AC wireless AP's installed etc. I am continuing to test this device for a while before I return it as I require functional wireless in my day to day job.
This is a huge issue, I contacted Samsung support yesterday about this (You should too) as I have confirmed that this is happening cross platform and carrier, S6 & S6 Edge, Verizon & Sprint that I am aware of so I'm guessing it all of them.

[Q] Linksys EA6350 (AC1200+) slow wifi only on Android devices.

I have a very odd wifi issue and I have yet to find an answer. I will try to be as detailed and thorough as possible.
I have Comcast as a provider, and I recently switched away from their all-in-one modem/router. I got a really good deal on a Motorola Surfboard 6141 and Linksys AC1200+ (EA6350) router due to a going out of a business sale from a local place.
Everything has been working perfectly except our phones (both 1st Gen Moto X's. Contract is almost up) and my Samsung Galaxy Tab Pro 8.4. We have tested 5 different Macbooks, an iPad, a Windows laptop, and a Microsoft Surface. Everything else is working without issue as in the speed is great and streaming/surfing/etc. is great. The only thing hardwired in is the Xbox One which works beautifully.
So on to my wireless settings. I've got both the 2.4ghz and the 5ghz enabled. They both use the same name and password. The 2.4ghz is set to channel 11, auto width, N-Only, and WPA2/WPA Mixed Personal The 5ghz is set to auto channel, auto width, mixed(AC and N), and WPA2/WPA Mixed Personal.
I've tried changing some of the DNS settings as well. I set static DNS1 to 8.8.8.8 and DNS2 to 8.8.4.4 and left the third space blank.
For the firewall settings IPv4 SPI and IPv6 SPI are enabled. And under Internet Filters, filter anonymous and filter ident(port 113) are checked, while filter multicast and filter internet NAT redirection are unchecked.
Nothing has really helped much. I can set the Moto X to 2.4ghz only and I get about 10mbps down, 11 up. On 5ghz only, I get a much better 37mbps down, and 12up. Unfortunately, either way, actual browsing/streaming are sluggish. Similar results on my Galaxy Pro (not an easy way to set to 2.4 or 5 only). Sites are just loading slow. Just google.com is taking roughly 20 seconds. I've been using Chrome and Dolphin browsers on both devices with similar results. The Moto X phones are running 4.4.4 and the Galaxy Tab Pro is running 4.4.2.
I took my phone and tablet to another wifi network (Linksys E1200 g/n. Didn't check settings.) and things were loading quickly and without issue despite being a 30/10 connection. If I turn off the wifi on my phone and just use 4G at my place, things load much faster and I'm only getting about 20 down 6 up. The other network and 4G only take about 2-4 seconds to bring up google.com.
I'm a little lost here. Even tried wiping the cache on both devices. I feel like there's just something I'm missing here and I'm not finding anything online. I can provide any other relevant details. Just not understanding why my Android devices are the only ones with issues.

Did you ever find a solution to this? I am experiencing the same issue.

I'm having the same problem.... My fix is gonna be to return this junk.

I've got one of these; I suspect hardware fault. I had bad speed with stock firmware; I also personally did not like the stock GUI at all so I put DD-WRT on mine. This did "fix" the GUI but not the wifi. As with all yours, the 5ghz is good, the 2.4ghz shows low signal power and low speed. In my case I already had a working 2.4ghz AP so I just ended up turning off the 2.4ghz on the EA6350 (making it 5ghz only), hooking them together via ethernet, and running both. I got mine from a thrift store though (unnamed but one that does good work with their profits); if I'd gotten it from some electronics store I would have put stock firmware back on and returned it.

WIFI connections issues on connection and speed

Hi. Recentlly I bought a Samsung S7(G930A - AT&T version) as refurbished one. I found a big issue what hurts me a lot. Here are some issues with wifi:
I could not really connect to a lot of WIFI networks, it says "connecting" after that it drops and cycle begins once again infinitly.
On several networks it shows "authentication error occured" , although wifi is public and another devices connects to than one.
On several networks, it connects but connection is very slow(0).. only way to make a better connection, is to put phone on router...awful...
On one networks which i tried, it worked ok..it's an 5ghz wifi. although, not for a long distance from router.
I installed all updates, tried troubleshots from internet with bluetooth, reset and everything..but no success at all... Now I think that problem is really in hardware... Had anyone such issues ? Any solutions to fix ?
Please help...

maxiannicu said:
Hi. Recentlly I bought a Samsung S7(G930A - AT&T version) as refurbished one. I found a big issue what hurts me a lot. Here are some issues with wifi:
I could not really connect to a lot of WIFI networks, it says "connecting" after that it drops and cycle begins once again infinitly.
On several networks it shows "authentication error occured" , although wifi is public and another devices connects to than one.
On several networks, it connects but connection is very slow(0).. only way to make a better connection, is to put phone on router...awful...
On one networks which i tried, it worked ok..it's an 5ghz wifi. although, not for a long distance from router.
I installed all updates, tried troubleshots from internet with bluetooth, reset and everything..but no success at all... Now I think that problem is really in hardware... Had anyone such issues ? Any solutions to fix ?
Please help...
Click to expand...
Click to collapse
I had frequent wifi connection authentication errors when connecting with my home wifi and slow Internet loading speeds with my Galaxy tablet, but all my other wifi devices connect consistently without errors.
The steps below solved a similar problem with my Samsung Galxy Note 10.1, and it might help with your Galaxy 7. Some of the steps may vary with your device, but the goal is to set wifi Poxy Settings to NONE, and IP Settings to DHCP. It completely resolved my home wifi authentication error and slow spped when browsing.
For the Galaxy Note 10.1: Settings> WiFi> long press the SSID/router name(the wifi you want to connect to)> Modify Network Config> check the box "Show Advanced Options">set proxy settings to "None" -- set IP settings to "DHCP"> Save.
Now my wifi connection with the Galaxy note 10.1 are quick, consistent, and Internet pages load fast.
I hope this is helpful.

Sony Xperia XZ Premium WiFi issue

Is anyone here also experiencing the same problem with me?
I found that from time to time, my XZ Premium losses WiFi connection and can't find any hotspot until I turn on then turn off airplane mode, or just restart.
Here are the screenshots form my S7 edge (SM-G935F) and XZ Premium, they were next to each other and very close to the router.
Please help me, thank you.

Screenshot from XZ Premium.

Screenshot from S7 edge.

are you using 5G? if you are, you need to update the wifi channel and band through your router settings. that's what i did with mine and now i don't have that intermittent wifi connection anymore.

Lawliet918 said:
are you using 5G? if you are, you need to update the wifi channel and band through your router settings. that's what i did with mine and now i don't have that intermittent wifi connection anymore.
Click to expand...
Click to collapse
Sure, thanks, I will give a try, and can you please tell me which channel and band should I use?

Anyone found a solution for this?
Wifi was spotty before the Android 8 update but now it's almost unusable. Every now and again it will just stop showing wifi connections, toggling wifi on and off might show a connection or 2 but it will either disappear or just say "Disabled" when trying to connect to it. Reboot solves it for a little while.
Usually use 2.4Ghz wifi with a variety of router brands.

redback_rsa said:
Anyone found a solution for this?
Wifi was spotty before the Android 8 update but now it's almost unusable. Every now and again it will just stop showing wifi connections, toggling wifi on and off might show a connection or 2 but it will either disappear or just say "Disabled" when trying to connect to it. Reboot solves it for a little while.
Usually use 2.4Ghz wifi with a variety of router brands.
Click to expand...
Click to collapse
Happens here on Android 8 as well, quite annoying to be honest. Sometimes drops the connection for no reason, and then when I click on WiFi settings, it doesn't show any connections till I turn WiFi on and off and even then it'll only show 1 SSID, turning it off for a while longer and then turning it back on brings back the rest of them and then it'll connect, but it's stupid how I have to keep doing this every few hours.

I set my 2.4 and 5 GHz bands to different names and join only the 5 GHz, and I don't get drops. On Oreo rooted.

i have xperia xz premium with Oreo 8.0 I encounter the same problems when I'm connected to my wifi, suddenly the data connection is blocked, and when this happens I have to turn off and on the wifi symbol to restore the connection. I do not understand why this happens. My phone is updated to the 47.1.A.5.51 system with November google patches. My modem is Billion Bipac 7800N

So it seems to be a common issue, anyone know if Sony is aware of it?
Where can we complain? It's their damn top of the range phone and it's most basic function isn't working right.

redback_rsa said:
So it seems to be a common issue, anyone know if Sony is aware of it?
Where can we complain? It's their damn top of the range phone and it's most basic function isn't working right.
Click to expand...
Click to collapse
https://talk.sonymobile.com/t5/Xperia-XZ-Premium/Wifi-signal-dropping/td-p/1229275
Knock yourself out. I've had more than one device with the Snapdragon 835 behave in this way, so I think it's a chipset issue.

charlatan01 said:
https://talk.sonymobile.com/t5/Xperia-XZ-Premium/Wifi-signal-dropping/td-p/1229275
Knock yourself out. I've had more than one device with the Snapdragon 835 behave in this way, so I think it's a chipset issue.
Click to expand...
Click to collapse
Left a message amongst the horde of others. Sony really dragging feet on this issue.

redback_rsa said:
Left a message amongst the horde of others. Sony really dragging feet on this issue.
Click to expand...
Click to collapse
Do a Google search for WiFi and Oreo and you will see that this is affecting multiple cell phones.
Do they all have the 835 chip in them???
I think it is an Oreo issue.
I have no such problems and I have Oreo and the 835.

Try disabling IPv6 on your router.
This is still OS/firmware issue but this temporally fix the issue

redback_rsa said:
Anyone found a solution for this?
Wifi was spotty before the Android 8 update but now it's almost unusable. Every now and again it will just stop showing wifi connections, toggling wifi on and off might show a connection or 2 but it will either disappear or just say "Disabled" when trying to connect to it. Reboot solves it for a little while.
Usually use 2.4Ghz wifi with a variety of router brands.
Click to expand...
Click to collapse
I found the solution:
My network works with two devices:
1 ZTE Router (2.4GHz)
1 D-LINK Repeater (2.4GHz)
In the router my XZ Premium works nicely, in the repeater happen exactly what you said, Connect apperars "no internet" after 1 second and wifi on Smartphone is automatically disabled or wifi stay enabled, but says "disabled" on network.
So.. I checked the wlan settings of the two devices in my network exhaustively item by item and I changed the devices settings about 20 times, I and I found that none of the settings matters (wpa or wep, 5Ghz or 2.4Ghz, Bandwidth 20Mhz or 40Mhz, type of network b / g / n, nor channel 1 to 13) just ignore this.
What REALLY MATTERS is a option in the advanced wlan settings, called "Fragment Threshold" this value was at 500, I changed it to the maximum (2346) and my XZ Premium started the connection instantly. Explaining: increasing this value defined that the packet can be up to 2346 bytes before being fragmented, so we deactivate packet fragmentation, reducing overhead and ensuring the best transmission rate possible, so this option determines the size of the frame.
Put simply: Go to advanced Wlan settings, locate "Fragment Threshold" and change to the highest possible value. That worked for me =)

worked for me
1- turn off wifi in being wifi settings ie where you view your wifi networks
2- select "scanning settings". it will show once you have turned your wifi off
3- turn off wifi and bluetooth scanning
4- go back turn wifi back on and enjoy

bill.i.am.x said:
worked for me
1- turn off wifi in being wifi settings ie where you view your wifi networks
2- select "scanning settings". it will show once you have turned your wifi off
3- turn off wifi and bluetooth scanning
4- go back turn wifi back on and enjoy
Click to expand...
Click to collapse
It did not work for me, unfortunately.

I know I am reactivating this thread after nearly 3 years of the last post but did anyone find any effective solution to the Wifi issue?