Database Users

wifi issues on N4 possible fix?

for those with wifi 'broken' try to change your router settings to WPA2 personal (TKIP+AES) that seems to work for me now,
other settings 'broke' the wifi
this might be just an issue with must me and my router
*spoke too soon: still broken, it only works certain times, mostly it just spins when i try to connecto to online
the wifi icon keeps flashing a black dot... that means the wifi is NOT working right? it should be just a solid blue bars?
on wifi advanced settings, WPS Pin Entry - what is this and do i need to enter that pin on my router?

still no luck with wifi on my network after flashing back to stock 4.2 from 4.2.1
same 'broken' wifi
might be this phone's wifi hardware is incompatible with wDDRT router?
Firmware: DD-WRT v24-sp2 (10/10/09) std
my other wifi devices work perfectly fine, so im really stumped
in phones advance wifi settings it has this WPS entry - what is this and is it somehow not allowing me full wifi?
i can view playstore,, it checks and loads my gMail but it won't connect to websites
it takes so long to download and install apps from playstore, i have to hit cancel, redownload, reinstall to get it working,etc. its not 'instant' like normal 20Mbps wifi should be
ran speedtest.net app and it wont connect to any servers
if anyone has clues to why my wifi is broken, please PM me thanks
it get a blue 3 to 4 bars on wifi signal but it keeps having this 'black' dot flashing in that wifi signal bar, (what is that?)
shows connected to my wifi at 72Mbps at good strength

I found my solution: in my router I unchecked the option WMM (Wi-Fi-multimedia)-settings (2.4GHz b/g/n). After I activated it, my data speeds increased enormously. Try it & report!

danielvc said:
I found my solution: in my router I unchecked the option WMM (Wi-Fi-multimedia)-settings (2.4GHz b/g/n). After I activated it, my data speeds increased enormously. Try it & report!
Click to expand...
Click to collapse
thanks i will look for that option in my router but don't think i have it

Public wifi and my work wifi working perfect with n4. So it definitely my routers wddrt firmware issues with n4... still gottta figure it
Sent from my TC970 (Wi-Fi) using xda app-developers app

My n4 will not connect to any of the WPA2 AP's around here.

I have the opposite problem. I can connect to my WPA2 router at home just fine but cannot connect to the WEP wifi at work. Well, not reliably. I've gotten connected twice, but was unable to recreate the conditions.
-Matt

I had speed problems with my 5GHz band at home. Connected, but couldn't get over 1Mbps on my 30+ connection. Connected to the 2.4Ghz band and I get significantly faster speeds. Haven't had problems connecting though.

siscim23 said:
I had speed problems with my 5GHz band at home. Connected, but couldn't get over 1Mbps on my 30+ connection. Connected to the 2.4Ghz band and I get significantly faster speeds. Haven't had problems connecting though.
Click to expand...
Click to collapse
I've noticed similar behavior, seems like my 5ghz signal strength is much weaker than my 2.4ghz signal according to my n4.

So this n4 is picky about. Certain WiFi networks.configs
Sent from my Nexus 4 using xda premium

Sometimes, my N4 loses wifi connection at work. It's inconsistent. My work wifi is open but MAC filtered.
There have been 3-4 times when I noticed that it lost wifi connection. I had to turn off wifi radio and back on to reconnect.
OTOH, connection to home DD-WRT wifi router is rock solid.

Set lease time for as long as possible, it normally this is 2 weeks..
sent via xda premium with Nexus 7 or Nexus 4!

I flashed my stock recovery backup and my wifi is working again!

jim.k.yee said:
I flashed my stock recovery backup and my wifi is working again!
Click to expand...
Click to collapse
??????
very strange !!!!
can you test to flash back CWM recovery and test again the wifi ?

Hello, I am also having problems with WIFI. I've tried a lot of things (change the router configuration, the cellular exchange kernel, etc ...) but I could not fix this problem. Can you give any more ideas? I've even thought about buying another router but can be giving the same problem.
I used my wife's phone as a router and it works normally, but when I connect directly to the router from home and he trasfere data only for a few moments and then transferring data, although still seem the symbol of wifi connected.

I found changing a setting on the Nexus 4 seems to have remedied most of my WiFi issues. Forcing the WiFi frequency band to 2.4GHz only instead of Auto appears to have done the trick for me.
In WiFi if you select Settings and Advanced under Wi-Fi frequency band there is an option to force 5GHz or 2.4GHz with the default on Auto.

BigVDawgy said:
I found changing a setting on the Nexus 4 seems to have remedied most of my WiFi issues. Forcing the WiFi frequency band to 2.4GHz only instead of Auto appears to have done the trick for me.
In WiFi if you select Settings and Advanced under Wi-Fi frequency band there is an option to force 5GHz or 2.4GHz with the default on Auto.
Click to expand...
Click to collapse
Will try it, thanks.

BigVDawgy said:
I found changing a setting on the Nexus 4 seems to have remedied most of my WiFi issues. Forcing the WiFi frequency band to 2.4GHz only instead of Auto appears to have done the trick for me.
In WiFi if you select Settings and Advanced under Wi-Fi frequency band there is an option to force 5GHz or 2.4GHz with the default on Auto.
Click to expand...
Click to collapse
I tried but did not fix, thanks for trying to help.

Lucena04 said:
I tried but did not fix, thanks for trying to help.
Click to expand...
Click to collapse
for me too
anyways thanks for the help...

Wi-Fi connection intermittent failure - requires router reboot!

I've been having this issue with both my Nexus' - my 10 and my 7.
I'll look up and find my connection bars greyed out or none showing and my connection dead. All the other devices on the network will be functioning just fine, just the Nexus will have no connection (I have two laptops - one Mac one PC - several cell phones and sometimes a printer)
Looking at the settings the network will show that it's either trying to connect over and over or just "saved".
Attempts to log back in will be unsuccessful with the device seeming like it's failing to get an IP address our something.
The ONLY way I can get reconnected is to reboot the router itself. Quite a drag...
Google doesn't seem to turn up anything, and forum searches likewise have not been successful
(One problem is there's a lot of 'noise' in results from searching trends like "Wi-Fi", "connection", etc).
Anyone have a clue? It's annoying, especially when it happens somewhere I don't have access to the router (coffee shop etc).
Mostly tho, it seems to happen at home.
I'm running a Belkin N150 router with out-of-the-box settings.
Any help would be greatly appreciated!
Note: the problems don't always show up on both Nexus' simultaneously. Sometimes one will have a connection while the other does not, and sometimes they'll both be disconnected.
Every other device's connection will be fine tho.
Sent from my Nexus 10 using Tapatalk

i think ur facing ip conflict, new routers should not have such issue but ur nexus devices seams to have such issue.
try this, manually setup ips in ur nexus device (give ips as far from ur normal ips e.g nomal ip 192.168.1.5-6-7 u try 50-51-52
and also give google dns in ur manual settings
8.8.8.8
8.8.4.4
grayed out signals means ur device cant resolve dns (usually cant connect to google)
replay with updates.
P.S: if you have connected to ur router via push button process then also try connecting to it via entering wifi password key.

xateeq said:
i think ur facing ip conflict, new routers should not have such issue but ur nexus devices seams to have such issue.
try this, manually setup ips in ur nexus device (give ips as far from ur normal ips e.g nomal ip 192.168.1.5-6-7 u try 50-51-52
and also give google dns in ur manual settings
8.8.8.8
8.8.4.4
grayed out signals means ur device cant resolve dns (usually cant connect to google)
replay with updates.
P.S: if you have connected to ur router via push button process then also try connecting to it via entering wifi password key.
Click to expand...
Click to collapse
Thanks, gonna try this. Lately been getting grey bars but still have internet so perhaps it's related to a dns problem.
Sent from my Nexus 7 using Tapatalk 2

Download free App from Store - "Wifi Analyzer" to scan your 2.4 Ghz band to see if interference from other nearby routers on the same channel might be causing interference. Switch to a less congested channel might solve the problem, Fios routers tend to default to Auto, usually on 1, 6 or 11 - your signals might be "fighting" with several others routers trying to "hand-shake" between the devices - do it while rebooting the router.
Take a look under Settings - Wi-Fi and then "Advanced" to see what is your N7's setting on "Keep Wi-Fi on during sleep" - if it switched into energy mode/sleep, it might stay there & wake up to resume. This is known to happen to Android devices but iOS ones too.

https://code.google.com/p/android/issues/detail?id=40065
This is a known problem. Read the above for more information.
My solution https://code.google.com/p/android/issues/detail?id=40065#c737
I have a N7 32G and an ASUS RT-N66U and had been having disconnection of my Wifi during use. Sometimes, turning on and off Wifi works but at spots in my house that's a bit further from the router, it will not connect. A few weeks back, rebooting my router helped for a few days and same problem occurred again. Then I tried static IP, and that helped for a few days. The latest test I did was to increase the "Network Key Rotation Interval" on the N66U from the default of 3600 to 7200. Crossing my fingers and hoping that this will finally solve my disconnection problem. My Wifi is set to 2.4GHz band, Wpa2-personal AES.
My firmware https://code.google.com/p/android/issues/detail?id=40065#c743
is firmware is 3.0.0.4.260 which is the latest.
Hope this will be useful for you. :thumbup:
Sent from my Nexus 7 using Tapatalk HD

will android switch to a better wifi if available?

Heyho, i currently have access to my wifi as well as to my neighbors network as my wifi gets weak while i am in the garden. I feel like android isnt awitching to my neighbors wifi automatically. Only when my wifi is completely gone, android will look for a new one.
I thought about making a task with tasker which looks for another wifi as soon as the current wifi strength goes below 25%.
Or is/should android do that aleady on its own?
Thanks

In wifi -> Advanced settings there's an option to avoid poor connection. I have no idea what it actually does, but give it a try.

I did the test with my router, which supports 2 frequencies.
Assuming both networks are saved in the phone, it connect automatically to the one with better signal or look for an alternative if signal is lost.

Thats what I mean, it will connect to the other WiFi if the connection is lost. But if the connection is crippled (bad) enough to not handle a music stream, but still "availabe" it will not switch to the other WiFi eventhough that other WiFi has 100% signal strength ?
I activated the "use wlan only if good strength available".. lets see how this works

I have multiple APs in my house and the only way I've ever got it to switch is by toggling wifi off and on (or loosing the first signal completely). This is an Android issue IINM, my GS2 and my N4 both have this issue.

I tried the "do not use weak WiFi".. didnt work.

zakazak said:
I tried the "do not use weak WiFi".. didnt work.
Click to expand...
Click to collapse
It has never worked for me either. Didn't work on my GSM GNex or with the N4.

I think it's how most WiFi clients work, otherwise if you were in the middle of 2 equal signals, it would spend more time disconnecting and reconnecting creating a DOS attack on the 2 AP's and leaving you with no data.
As for 2 home wireless routers, use the same SSID and authentication settings for both, and put one on channel 1 and the other on channel 11.
Make one a AP only (no router, no firewall, no dhcp server) and connect it to a client wired port on the first one. You can roam between them like people in large offices do.

or I try to make a tasker profile
if wifi strenght below 20% and another wifi is available with more than 30%, connect to that one.. then wait 5 minutes ?

Connecting to home wifi faster

First my setup:
XT1572
TruPureXMM 2.6.3
frankenclark kernel 0.8
Is there anyway to connect to my homewifi faster? I've selected to only show 5ghz wifi networks and I'm only seeing two when I enable wifi yet it dosen't connect to my wifi for maybe 5-10 seconds. Is this a problem with the rom/kernel? I don't remember connecting being this slow when I was on stock 5.1.
If I can change connect speed through the rom/kernel that would be best. Otherwise is there an app that can do it?

Heaby said:
First my setup:
XT1572
TruPureXMM 2.6.3
frankenclark kernel 0.8
Is there anyway to connect to my homewifi faster? I've selected to only show 5ghz wifi networks and I'm only seeing two when I enable wifi yet it dosen't connect to my wifi for maybe 5-10 seconds. Is this a problem with the rom/kernel? I don't remember connecting being this slow when I was on stock 5.1.
If I can change connect speed through the rom/kernel that would be best. Otherwise is there an app that can do it?
Click to expand...
Click to collapse
i cant see why you would choose 5ghz over 2.4ghz maybe thats the reason for your problem

5Ghz allows for faster throughput (more bandwidth available) - uses 80 mhz channels vs 20 mhz on the 2.4ghz.
I noticed the slow connection too. Seems if you open wifi settings, it connects immediately.

Heaby said:
First my setup:
XT1572
TruPureXMM 2.6.3
frankenclark kernel 0.8
Is there anyway to connect to my homewifi faster? I've selected to only show 5ghz wifi networks and I'm only seeing two when I enable wifi yet it dosen't connect to my wifi for maybe 5-10 seconds. Is this a problem with the rom/kernel? I don't remember connecting being this slow when I was on stock 5.1.
If I can change connect speed through the rom/kernel that would be best. Otherwise is there an app that can do it?
Click to expand...
Click to collapse
Did you try changing the channel in your router?

Haven't tried changing the channel. Will report back after I get home after work.

Heaby said:
First my setup:
XT1572
TruPureXMM 2.6.3
frankenclark kernel 0.8
Is there anyway to connect to my homewifi faster? I've selected to only show 5ghz wifi networks and I'm only seeing two when I enable wifi yet it dosen't connect to my wifi for maybe 5-10 seconds. Is this a problem with the rom/kernel? I don't remember connecting being this slow when I was on stock 5.1.
If I can change connect speed through the rom/kernel that would be best. Otherwise is there an app that can do it?
Click to expand...
Click to collapse
I can say that problem is with ROM.
It has very slow auto connection time.
To connect faster I am using:
- drop down notification menu - tap wifi menu where its possible to choose wifi's from that setting - just wait, as soon as it turns on wifi and actually starts to scan area it will auto connect faster than when you just turn on wifi and wait.

I confirm this behavior on XT1575 as well. It takes quite a long time to connect when i enable WiFi.
But if I enter the WiFi settings, it connects instantly.
And i think it's like this since Android 6. I don't recall having this issue on Android 5.

I can't say I've noticed any problems connecting to WiFi networks at home.
I'm running 6.0 stock (Feb 2016 security update) rooted to hell and back.
I have access to five different WiFi networks at home, and am registered to all five for convenience.
I use an app called Best WiFi to auto-connect to the strongest signal whenever my current signal drops below a user-configurable strength threshold.
Perhaps that's the reason I'm not feeling this issue?
https://play.google.com/store/apps/details?id=com.pintacdesign.bestwifi&hl=en
I've been using this app for years, since Android 4.0, and across four or five different devices now.
Edit - Before the inevitable questions. I live in a basement and have my own personal WiFi network down there. Upstairs, we have two network piping out of the office (2.4 GHz and an associated 5 GHz link). For the far side of the home, we have a WiFi extender that mirrors and extends those two signals coming from the office (2.4 GHz-Ext and 5 GHz-Ext).

My report:
Whether connecting to 2.4 Ghz (20/40 Mhz) or 5 Ghz (20/40/80 Mhz) the connectspeed is between 5-15 seconds if singlepressing on the wifitoggle. If longpressed it takes about 2-3 seconds. Either this is a problem with the rom or this is the intended behaviour in Marshmallow. But this was not the behaviour in Lollipop as far as I remember. Of course you could argue this a nonissue since longpressing the wifitoggle is the solution. However I would like singlepressing to behave the same since I use Gravitybox to hide the statusbar when pressing 2-state tiles.

Yeah this is a huge pain in the ass. I set up a WiFi shortcut on my home screen so I would start using WiFI more to save battery, but it takes so long for it to finally connect. I also have Tasker turn WiFi on in the morning when my alarm goes off, and it takes so long. It took a few seconds in Lollipop, and now it takes 10+ seconds in Marshmallow. It's ridiculous. Anyway there is no real fix except going into the settings or tapping the drop-down toggle multiple times, as others stated.

I notice the same thing too. Wifi takes long to connect on boot. When I go to connect wifi off, it always shows the routers in the previous area before showing what's in the current area. I turn wifi off when leaving home. I'll connect to a public router, but will still show my home router before showing any around me. I had a Galaxy S5 before and wifi connected right away.

Heaby said:
First my setup:
XT1572
TruPureXMM 2.6.3
frankenclark kernel 0.8
Is there anyway to connect to my homewifi faster? I've selected to only show 5ghz wifi networks and I'm only seeing two when I enable wifi yet it dosen't connect to my wifi for maybe 5-10 seconds. Is this a problem with the rom/kernel? I don't remember connecting being this slow when I was on stock 5.1.
If I can change connect speed through the rom/kernel that would be best. Otherwise is there an app that can do it?
Click to expand...
Click to collapse
First off, I am not sure if the OP is turning wifi on first when arriving at home and then seeing the delay, or if Wifi is already ON when you arrive home (EDIT: just reread OP and it appears you are turning it ON - see below), but I leave Wifi ON all the time and do not see any delay when I get home (I pull into my garage and my apps are already updating via my home wifi before I park my car).
There are various steps involved in "getting onto wifi" that don't just involve the client device (authentication to the access point; getting an available IP address from your AP or a separate router, and the stability/software quality of those devices, for example). but you may want to consider a few things to speed up the process at home regardless if Wifi is on, or you turn it on first:
1) go into "Saved Networks" in your wireless settings and "forget" any networks you don't need
2) make sure the device on your network issuing IP addresses (DHCP server software built into your router or AP, whichever you use - also make sure only ONE of the them is acting as DHCP server) has enough available IP's in its pool - better yet, assign the same IP to your MotoX's MAC address (set up a static IP in your routers LAN/DHCP settings if it has them so your MotoX gets the same IP every time)
3) while I agree with another poster about avoiding the 2.4 GHz for Wifi (congestion and more interference), even many 802.11n client radios today don't support 5GHz so keep that in mind if you shut down 2.4GHz in your home completely
4) Use WPA2 with PSK for authentication AND make sure your home SSID is being broadcast (not hidden, which they really aren't anyway with the right tools - A strong WPA2 PSK password is better security even if the world can see your SSID.
4) If you do turn Wifi On and Off, consider leaving it ON and see if that helps your connection time (I suspect it will If you are concerned about battery drain, you can disable wifi during sleep in wireless settings, but I don't have a battery issue with Wifi on 24/7. The Wifi radio beaconing for SSID's or even staying connected to an SSID in the background, when you're not using Wifi, is a very minimal power drain compared to having your screen brightness higher than you need (you can however turn off the annoying wifi network notification setting).
Hope this helps.

For those with this delay, are you running xposed with gravitybox? Tried disabling gravitybox? It maybe GB that's introducing the delay. Need feedback from those running stock.
If stock exhibits similar behavior then it's probably characteristic of the quick toggles in the moto x. The delay appears to be in the actual wifi connection phase, not acquiring ip. As once it actually connects, IP acquisition is almost instant. Toggling wifi off then on directly through settings is very fast, maybe 3-4 seconds.
I have a moto g lte (xt1045) on cm13 which takes about 5 seconds to connect after toggling wifi off then back on. The moto x takes a good 15 seconds.

ech1253 said:
First off, I am not sure if the OP is turning wifi on first when arriving at home and then seeing the delay, or if Wifi is already ON when you arrive home (EDIT: just reread OP and it appears you are turning it ON - see below), but I leave Wifi ON all the time and do not see any delay when I get home (I pull into my garage and my apps are already updating via my home wifi before I park my car).
There are various steps involved in "getting onto wifi" that don't just involve the client device (authentication to the access point; getting an available IP address from your AP or a separate router, and the stability/software quality of those devices, for example). but you may want to consider a few things to speed up the process at home regardless if Wifi is on, or you turn it on first:
1) go into "Saved Networks" in your wireless settings and "forget" any networks you don't need
2) make sure the device on your network issuing IP addresses (DHCP server software built into your router or AP, whichever you use - also make sure only ONE of the them is acting as DHCP server) has enough available IP's in its pool - better yet, assign the same IP to your MotoX's MAC address (set up a static IP in your routers LAN/DHCP settings if it has them so your MotoX gets the same IP every time)
3) while I agree with another poster about avoiding the 2.4 GHz for Wifi (congestion and more interference), even many 802.11n client radios today don't support 5GHz so keep that in mind if you shut down 2.4GHz in your home completely
4) Use WPA2 with PSK for authentication AND make sure your home SSID is being broadcast (not hidden, which they really aren't anyway with the right tools - A strong WPA2 PSK password is better security even if the world can see your SSID.
4) If you do turn Wifi On and Off, consider leaving it ON and see if that helps your connection time (I suspect it will If you are concerned about battery drain, you can disable wifi during sleep in wireless settings, but I don't have a battery issue with Wifi on 24/7. The Wifi radio beaconing for SSID's or even staying connected to an SSID in the background, when you're not using Wifi, is a very minimal power drain compared to having your screen brightness higher than you need (you can however turn off the annoying wifi network notification setting).
Hope this helps.
Click to expand...
Click to collapse
gpz1100 said:
For those with this delay, are you running xposed with gravitybox? Tried disabling gravitybox? It maybe GB that's introducing the delay. Need feedback from those running stock.
If stock exhibits similar behavior then it's probably characteristic of the quick toggles in the moto x. The delay appears to be in the actual wifi connection phase, not acquiring ip. As once it actually connects, IP acquisition is almost instant. Toggling wifi off then on directly through settings is very fast, maybe 3-4 seconds.
I have a moto g lte (xt1045) on cm13 which takes about 5 seconds to connect after toggling wifi off then back on. The moto x takes a good 15 seconds.
Click to expand...
Click to collapse
@ech1253: I've checked everything you suggested and you are right, having wifi on will make it connect almost instantly.
@gpz1100: I'm running xposed with gravitybox. Disabling gravitybox didn't change anything. I'd rather not uninstall xposed and/or go back to stock so if someone on stock without xposed could chime in that would be helpful.

It does it on stock android 6 for me and on a custom rom as well. Since day 1 with the moto x but at least wifi works just a long delay that no other android flagship from suffers from. :S

hexxor93 said:
It does it on stock android 6 for me and on a custom rom as well. Since day 1 with the moto x but at least wifi works just a long delay that no other android flagship from suffers from. :S
Click to expand...
Click to collapse
That's...not encouraging
Hopefully it's a softwarebug.

S8 Internet connection may not be available issue

Just got the S8 and I have 3 Wi-Fi access points at home to cover the whole house. My S8 has been registered with the passwords for all of the APs but it continually rejects the connections with an exclamation mark after the WiFi icon having connected and then shown a message that the Internet connection may not be available. The Internet connection is available as other devices are connected and using it perfectly. If I switch the Wi-Fi on and off and reboot the S8 the issue corrects itself but I should not have to go through that nonsense every time I come home and want to use my Wi-Fi. I have explored the advanced options on the connection settings and they appear to be quite limited (DHCP Etc). Is there some way to solve this issue? I have no problem with other android devices connecting to the same hotspots. Any ideas that might lead to a solution would be appreciated.

bbersk said:
Just got the S8 and I have 3 Wi-Fi access points at home to cover the whole house. My S8 has been registered with the passwords for all of the APs but it continually rejects the connections with an exclamation mark after the WiFi icon having connected and then shown a message that the Internet connection may not be available. The Internet connection is available as other devices are connected and using it perfectly. If I switch the Wi-Fi on and off and reboot the S8 the issue corrects itself but I should not have to go through that nonsense every time I come home and want to use my Wi-Fi. I have explored the advanced options on the connection settings and they appear to be quite limited (DHCP Etc). Is there some way to solve this issue? I have no problem with other android devices connecting to the same hotspots. Any ideas that might lead to a solution would be appreciated.
Click to expand...
Click to collapse
I had this problem when i first got my s8 from vodafone but when i got this latest update it's been good no issues with internet anymore.

I have this problem as well with my S8 from Verizon. Worked flawlessly for a week and them today I get this error. Very frustrating. I know the SMG955U from Verizon is already unlocked but is there any way to put the International ROM on the phone seeing that the Verizon and the International are the same?
I've tried all the resets etc and the WiFi connects but I get the 'Internet connection may not be available' message.

Update 27/04/2017
Thanks for the reply. My S8 developed some interesting issues including the switching on of 'do not disturb' mode intermittently and along with the Wi-Fi issue the mobile data was failing in areas where a full 4G signal was present. Rebooting, resetting etc did not resolve the issue and I returned the phone to CPW for advice. The staff at the Glasgow store wasted no time and exchanged it on the spot after some negotiation with their technical service centre. Full marks to CPW for the prompt service and I can report that all of the previous issues have now been resolved with the replacement handset. I thought it worthwhile to post this information so that others who experience similar issues may be able to get a similar resolution.

Poor WIFI performance
I also have issues with the wifi of the phone, /i will get the terminal replace some time today or next week.
1. WIFI keeps disconnecting, actually it's flapping connct&disconnect for 5-10 min until it finally connects, on this matter I have seen on the acces point that it tried to allocate an ip from an unknown without asking DHCP server for an IP renew it actually tries to alocate itself the last known ip, and clearly disconnects because of lack of internet access, this happens normally as power saving mode is on, disabeling power saving and assigning a static ip on the phone seems to resolve the issue.
2. poor wifi signal... no fix for this thus far
- i have 580Mbps speed connection on my S5 and only 120-240Mbps on my S8, steaming not working and connection in general very bad, time ots and stuf, although I position myself at 10cm away from the wifi router antenas i only get 540Mbps signal, although I have an AC1750 router , s5 gets 840 in the same spot... I think the modem(that is part of the Exynos chipset) does not work wekll with Atheros based AP´s , I have an Archer C7 with 2.4ghz QCA9558 chipset capable of 450 Mbps theoretical speed, but only uses 2 antenas as s8 only has 2 from my knowledge and reaches a max of 140Mbps(should of connected at 300Mbps at 10cm in theory ) with the s8 and QCA9880-BR4A on the 5ghz side of things with a theoretical speed of 1300Mbps should work at 866 with the S8 because of the 2 antenas of the S8.

phone changed 90% of problems fixed
Hello, just got my phone replaced, tha new unit has way better wifi signal considering I hace atheros router and the phone has broadcom 43xx chipset... worth considerign changing to a broadcom router...

Hi,
I have found a solution to this problem.
1. GO to wifi settings
2. Forget the wifi network
3. CONNECT AGAIN BUT BEFORE CONNECTING GO TO ADVANCED OPTIONS AND CHOOSE STATIC INSTEAD OF AUtOMATIC. Enter in the ip address etc and connect.( It requires to be entered manually) Problem will be solved.

bbersk said:
Just got the S8 and I have 3 Wi-Fi access points at home to cover the whole house. My S8 has been registered with the passwords for all of the APs but it continually rejects the connections with an exclamation mark after the WiFi icon having connected and then shown a message that the Internet connection may not be available. The Internet connection is available as other devices are connected and using it perfectly. If I switch the Wi-Fi on and off and reboot the S8 the issue corrects itself but I should not have to go through that nonsense every time I come home and want to use my Wi-Fi. I have explored the advanced options on the connection settings and they appear to be quite limited (DHCP Etc). Is there some way to solve this issue? I have no problem with other android devices connecting to the same hotspots. Any ideas that might lead to a solution would be appreciated.
Click to expand...
Click to collapse
Hi,
I have found a solution to this problem.
1. GO to wifi settings
2. Forget the wifi network
3. CONNECT AGAIN BUT BEFORE CONNECTING GO TO ADVANCED OPTIONS AND CHOOSE STATIC INSTEAD OF AUtOMATIC. Enter in the ip address etc and connect. Problem will be solved.

@Saurav913 doesn't work your tip,but my wifi drop too much especially in stanby (set it on always option) and till I wake up my phone i don't have wifi again with router Vodafone revolution..

Change the DNS...
Hi there..
I had just the same problem with s8 plus and s7 edge(after updating to android 7.0), it kept saying "internet may not be available", I changed the DNS to 8.8.8.8 and tue problem solved. Go to SETTINGS》WIFI》SSID》MANGE NETWORK》change the IP SETTINGS to STATIC》then change the DNS1 to 8.8.8.8 hit save and you are good to go.
Sorry if there are any mistakes. I am new to XDA and not good in english.
---------- Post added at 01:24 AM ---------- Previous post was at 01:20 AM ----------
bbersk said:
Just got the S8 and I have 3 Wi-Fi access points at home to cover the whole house. My S8 has been registered with the passwords for all of the APs but it continually rejects the connections with an exclamation mark after the WiFi icon having connected and then shown a message that the Internet connection may not be available. The Internet connection is available as other devices are connected and using it perfectly. If I switch the Wi-Fi on and off and reboot the S8 the issue corrects itself but I should not have to go through that nonsense every time I come home and want to use my Wi-Fi. I have explored the advanced options on the connection settings and they appear to be quite limited (DHCP Etc). Is there some way to solve this issue? I have no problem with other android devices connecting to the same hotspots. Any ideas that might lead to a solution would be appreciated.
Click to expand...
Click to collapse
Hi there..
I had just the same problem with s8 plus and s7 edge(after updating to android 7.0), it kept saying "internet may not be available", I changed the DNS to 8.8.8.8 and tue problem solved. Go to SETTINGS》WIFI》SSID》MANGE NETWORK》change the IP SETTINGS to STATIC》then change the DNS1 to 8.8.8.8 hit save and you are good to go.
Sorry if there are any mistakes. I am new to XDA and not good in english.

I have same problem and it is very annoying. I got 2 S8 plus and both have the problem.
There are 3 WIFI Router that covers my house. I have problems saying internet might not be available every time I connect. This is very annoying. Other Phones in the house like Iphone do not have the problem.
What I noticed is that the IP range of my router is:
192.168.1.1
But my S8 says he is connected but the IP is
192.168.0.100
Anyone have same problem?
Thanks!

bbersk said:
Just got the S8 and I have 3 Wi-Fi access points at home to cover the whole house. My S8 has been registered with the passwords for all of the APs but it continually rejects the connections with an exclamation mark after the WiFi icon having connected and then shown a message that the Internet connection may not be available. The Internet connection is available as other devices are connected and using it perfectly. If I switch the Wi-Fi on and off and reboot the S8 the issue corrects itself but I should not have to go through that nonsense every time I come home and want to use my Wi-Fi. I have explored the advanced options on the connection settings and they appear to be quite limited (DHCP Etc). Is there some way to solve this issue? I have no problem with other android devices connecting to the same hotspots. Any ideas that might lead to a solution would be appreciated.
Click to expand...
Click to collapse
I found a quick work around on how to fix this temporarily until Samsung issues a patch.
just turn off 5ghz SSID broadcasting and you should be ok for now.
here is a quick how to video i made on just in case.
https://youtu.be/Nu5FjDPLn-M

I'm having a very similar problem with my home WiFi and my Verizon S8+ I bought from Samsung's website. I've tried switching from DHCP to static and entering all my info. No luck. I've also switched my dns1 to 8.8.8.8 and dns2 to 8.8.4.4, and my WiFi router is set to 2.4ghz only. No success in resolving the issue. Currently my phone will show the "internet may not be available" with the added exclaimation point for a few minutes when first connected, then the exclaimation goes away and I'll have regular full speed internet for around 25-45 seconds before it goes back to a non-internet state. Any suggestions?

Try changing in your router the security setting. If your using WPA2 AES/TKIP, change to just WPA2 TKIP and see if this works for you...
I was having the same exact issue for months. I changed to TKIP only and have been rock solid ever since. No more ! at all... I'm gonna switch to just AES today and see how that works.

Changed to WPA2-AES and within the hour had ! back and no internet. Went back to TKIP and rock solid again. Looks like a possible bug with AES to me. Sticking with wpa2-tkip setting for now.

I'm having this same exact issue.
Anyone who knows what to look for to fix this, what info or files do you need from me? I'm at the end of my tether with this ****

I am having the exact same issue on my galaxy tab s2, even on the replacement. Due to the being such an intermittent problem, it wouldn't do it when Samsung support checked it out...
This happens on both 2.4 ghz and 5 ghz frequency for me. I've tried downloading a wifi fixer, I've reset network settings, and turned off nearby device scanning. I've also tried doing what a forum suggested by changing the ip settings from dhcp to static but it wouldn't connect to wifi at all. Not sure what else to try...
I read that it may be due to nougat 7.0 software. I was suggested by Samsung to first put the tablet on safe mode (this disables third party apps, and would reveil if an app was causing the problem) but the problem still persists. Also did a hard reset on the first tablet I had but it still done the same problem...

I always thought that this was a is problem in 7.0, and was addressed in 7.1. Hopefully, when the next major update comes out, this issue will be resolved.

Oh come on Samsung!
It's been 4 months since the first post and still no solution.
And it's a basic wifi connection!
Internet may not be available! = Samsung may not be available

Heya all. First post I guess
Edit: Gah it was the second. I have to controll myself better and not spam.
So I had the same problem and tried more or less all.
My "solution" was to disable the firewall on the router which means some settings/security there was triggered. My guess is that it's the "Smart Network connection" that trigger it if the phone have both poor Wi-Fi and 4G. It then jumps back and forward = firewall detect strange behaviour and block. That's why there are so many strange "fix" related to the router - hidden network - no security - disable 5Ghz and so on.
Can someone please test asap as I have a plan But if it's not this to test
JayJayaa said:
Oh come on Samsung!
It's been 4 months since the first post and still no solution.
And it's a basic wifi connection!
Internet may not be available! = Samsung may not be available
Click to expand...
Click to collapse