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WiFi not working after extended periods of non use

So what I'm finding is that if my tab sits on the charger for a long time without using it, when I go to use it the wifi icon is gone. When I go into wifi settings, it says my network is not in range. To fix it, I have to toggle wifi off and then back on, and then it gets on my network just fine.
Anyone else have this problem?

Have you tried changing the wifi sleep setting? Worked for me, I believe it is under settings-asus customizedsettings- wifi sleep settings

bronzwarlock1225 said:
Have you tried changing the wifi sleep setting? Worked for me, I believe it is under settings-asus customizedsettings- wifi sleep settings
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Yeah already checked and it's set to never.

EvoXOhio said:
Yeah already checked and it's set to never.
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Click to collapse
really odd. Outta ideas already lol. Good luck!

I had this issue with my TF101 after not having the issue for 2.5/3rds of the time I owned the TF101. Initially I thought it was the TF101 but I narrowed it down to the router.
A) I had implemented a policy on my router to restrict the number of IP addresses it can "assign" to connections. In this case it was set to then and there were more than ten devices connected to the router making it impossible to assign an IP address to the TF101.
B) It could have just been something with the router I wasn't aware of as resetting the router always fixed the issue. Though this could be explained by saying resetting the router resets all of the connections and opens up a spot for the TF.

In Android phones you can use the secret codes
If you have the phone apk installed perphas you can use this:
WLAN Test:
*#*#232339#*#*
*#*#526#*#*
*#*#528#*#*

EvoXOhio said:
So what I'm finding is that if my tab sits on the charger for a long time without using it, when I go to use it the wifi icon is gone.
When I go into wifi settings, it says my network is not in range. To fix it, I have to toggle wifi off and then back on, and then it gets on my network just fine.
Anyone else have this problem?
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Click to collapse
I have noticed that when my 300 is sleeping for a while, my email will not push/ sync. When I wake my tab up, Ive noticed the wifi icon is gone, but will come back in a second or two. Ive never had to toggle the wifi however.
And yes, Ive made sure the Battery Saving setting is unchecked to not suspend network connection while sleeping.

Wi-fi not working when phone goes to sleep

My galaxy S4 connects to any network flawlessly and I can browse the web, etc. but when I press the power button to lock the phone or if the phone goes to sleep by itself, when I unlock the phone, I'm still connected to the wireless network, but I can't browse the web or do anything. I have to disconnect and reconnect for it to do anything (and sometimes it takes 5 mins. to find the network. it says it's not in range 90% of the time). I've set wi-fi to "always on" during sleep and I've also turned wi-fi power saving mode off in the hidden menu but it still doesn't work. Like I said, it doesn't disconnect but the orange down arrow flashes and I can't browse the web, etc. I actually wiped the phone and the problem went away for a few days but cropped back up yesterday which leads me to believe there must be some bug causing it but I have no idea what triggers it. Does anyone have any ideas on what to do?

Are you running stock rom?

theloneranger08 said:
My galaxy S4 connects to any network flawlessly and I can browse the web, etc. but when I press the power button to lock the phone or if the phone goes to sleep by itself, when I unlock the phone, I'm still connected to the wireless network, but I can't browse the web or do anything. I have to disconnect and reconnect for it to do anything (and sometimes it takes 5 mins. to find the network. it says it's not in range 90% of the time). I've set wi-fi to "always on" during sleep and I've also turned wi-fi power saving mode off in the hidden menu but it still doesn't work. Like I said, it doesn't disconnect but the orange down arrow flashes and I can't browse the web, etc. I actually wiped the phone and the problem went away for a few days but cropped back up yesterday which leads me to believe there must be some bug causing it but I have no idea what triggers it. Does anyone have any ideas on what to do?
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Sounds like what I'm experiencing as well!
http://forum.xda-developers.com/showthread.php?t=2303379
Hey guys,
Just noticed something odd this last few days. The statusbar WiFi icon is dimmed; but I'm connected on WiFi just fine. I can browse, and the WiFi settings is showing all is OK. As in, I'm still connected to my SSID.
Anyone experienced this? What's the best way for me to pull logs? I'm a bit of an Android n00b.
The particular SSID is on a 5GHz AC channel (pretty sure it's on AC, or at the very least N), on TKIP+AES. I've read that the S4 had problems with D-Link routers on TKIP+AES, but I've got an ASUS running DD-WRT. I don't have any other problem with the other devices in the house on WiFi.
Running WanamLite ROM, with FauxKernel 3.
Thanks!
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I should probably note, sometimes I'd have trouble connecting to the internet as well!

C13v3r0n3 said:
Are you running stock rom?
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Yeah I am. I'm not rooted either.

hidea said:
Sounds like what I'm experiencing as well!
http://forum.xda-developers.com/showthread.php?t=2303379
I should probably note, sometimes I'd have trouble connecting to the internet as well!
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I'm connected but I don't have internet so my problem is different.

theloneranger08 said:
I'm connected but I don't have internet so my problem is different.
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Click to collapse
I should clarify,
I'm connected to my router/SSID; but I can't connect to the internet.
But I'm trying out this new solution people have been suggesting.
I created a guest SSID on my router (ASUS RT-AC66U, on ASUS-Merlin firmware), and I pretty much disabled Intranet access on the guest account, and dropped TKIP.
Let's see if the problem will go away.
http://forums.androidcentral.com/sa...axy-s4-d-link-routers-wifi-issues-solved.html

hidea said:
I should clarify,
I'm connected to my router/SSID; but I can't connect to the internet.
But I'm trying out this new solution people have been suggesting.
I created a guest SSID on my router (ASUS RT-AC66U, on ASUS-Merlin firmware), and I pretty much disabled Intranet access on the guest account, and dropped TKIP.
Let's see if the problem will go away.
http://forums.androidcentral.com/sa...axy-s4-d-link-routers-wifi-issues-solved.html
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Click to collapse
Does it only happen when you lock your phone?

theloneranger08 said:
Does it only happen when you lock your phone?
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yep. Locked and after sleep. I'll continue observing the problem, with the new solution I posted. I'll report back as soon as I know more (if the problem persists)

gametat manifes
hidea said:
yep. Locked and after sleep. I'll continue observing the problem, with the new solution I posted. I'll report back as soon as I know more (if the problem persists)
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Click to collapse
Unfortunately there's no option for me to create a guest SSID on my netgear router...

i believe this was/is a bug for the SIII. a quick search should bring you to a thread i was flipping through earlier for my girlfriends S3. I noticed it the first day I had my S4 but havent seen it happen since.

Go to your Wi-Fi, press the menu button and click advanced settings, there should be a option to "Keep Wi-Fi on during Sleep" if you want it on select always

LeKtRiCzzz said:
Go to your Wi-Fi, press the menu button and click advanced settings, there should be a option to "Keep Wi-Fi on during Sleep" if you want it on select always
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I've already tried that. Also by default it's set to always on.

simbill said:
i believe this was/is a bug for the SIII. a quick search should bring you to a thread i was flipping through earlier for my girlfriends S3. I noticed it the first day I had my S4 but havent seen it happen since.
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The two solutions provided for that bug are to set Wi-Fi to always on during sleep and to turn off the wireless power saving mode in the hidden menu (which can only be accessed by dialing a certain number). Neither of those solutions work.

No go, problem is still very much there for me.
So far I've:
1) Created a guest SSID, with only AES. Problem is still there
2) Loaded a different kernel (albeit a 9505 kernel). Problem is still there.
I'm rooted, running a different kernel and ROM than stock. I'm on Virgin Mobile i337M (Canadian S4). I've unlocked my phone through the Service Menu, I've also enabled my AWS bands, using the QTPS patch. Though I think this is all irrelevant, because theloneranger08 is running an unrooted phone.
So something must've cause the WiFi sleep issue.
EDIT:
What's the best way to go about logging the issue here? I'm a total Logcat newbie. I managed to set it up on my Mac; but not sure what sort of logging I should be doing. Cheers!

hidea said:
No go, problem is still very much there for me.
So far I've:
1) Created a guest SSID, with only AES. Problem is still there
2) Loaded a different kernel (albeit a 9505 kernel). Problem is still there.
I'm rooted, running a different kernel and ROM than stock. I'm on Virgin Mobile i337M (Canadian S4). I've unlocked my phone through the Service Menu, I've also enabled my AWS bands, using the QTPS patch. Though I think this is all irrelevant, because theloneranger08 is running an unrooted phone.
So something must've cause the WiFi sleep issue.
EDIT:
What's the best way to go about logging the issue here? I'm a total Logcat newbie. I managed to set it up on my Mac; but not sure what sort of logging I should be doing. Cheers!
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Click to collapse
Yeah I can't seem to get it fixed. I actually decided to call AT&T and they are sending me a new phone along with the necessary supplies to send my current one back. Hopefully it's a hardware issue and the new phone is fine. Although the fact that it worked for two weeks with no problems and wiping it got rid of the problem for a couple days leads me to believe it must be some bug in the software. Granted, I haven't come across hardly anyone (besides the people on this thread) with this issue so hopefully it is hardware related. I'll be so ticked if the new phone does the same thing...

I got a new phone and I didn't have any issues for a few days but now it's back. Anyone have any ideas?

theloneranger08 said:
I got a new phone and I didn't have any issues for a few days but now it's back. Anyone have any ideas?
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Kinda impossible for two phones to have the same exact issue. Which lead me to believe this is a software bug.
Can you verify if you have "Check for Internet service" enabled, on Advance WiFi settings (Settings > WiFi > (tap menu) > Advance).
I restored my phone a few days ago, wiped it clean. I decided not to use this feature (it's off by default; but I had it on when I first encountered this issue), and I have yet to see the problem we had. I spoke to a friend who's a network engineer, it could be due to timeouts to the cell towers, whilst checking internet connection periodically, etc. etc.

hidea said:
Kinda impossible for two phones to have the same exact issue. Which lead me to believe this is a software bug.
Can you verify if you have "Check for Internet service" enabled, on Advance WiFi settings (Settings > WiFi > (tap menu) > Advance).
I restored my phone a few days ago, wiped it clean. I decided not to use this feature (it's off by default; but I had it on when I first encountered this issue), and I have yet to see the problem we had. I spoke to a friend who's a network engineer, it could be due to timeouts to the cell towers, whilst checking internet connection periodically, etc. etc.
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No it's turned off. I've tried everything but I just can't find a fix. Is there anyway to somehow log the phone and see what runs when I put the phone to sleep? Is it possible that it's an app doing it?

theloneranger08 said:
No it's turned off. I've tried everything but I just can't find a fix. Is there anyway to somehow log the phone and see what runs when I put the phone to sleep? Is it possible that it's an app doing it?
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If you're still having this issue, can you check into your Accounts setting? See if there's any sync error.
I had no problem for a few weeks after restoring my phone to factory setting. Then two days ago, the issue re-appear. The last thing I did was adding a new Google account (secondary account, for work). That's when the WiFi problem started appearing again. Then I noticed the sync issue on the newly added account, I had to uncheck certain options, and check them back again. Since then, the issue hasn't re-appear *crossing my fingers*
Way back in the day, I remember that WiFi indicators would look different if you have WiFi with internet access, but not connected to Google accounts (or have issues).
I know this is different than what we initially talked about; but I guess we're eliminating possibilities.

hidea said:
If you're still having this issue, can you check into your Accounts setting? See if there's any sync error.
I had no problem for a few weeks after restoring my phone to factory setting. Then two days ago, the issue re-appear. The last thing I did was adding a new Google account (secondary account, for work). That's when the WiFi problem started appearing again. Then I noticed the sync issue on the newly added account, I had to uncheck certain options, and check them back again. Since then, the issue hasn't re-appear *crossing my fingers*
Way back in the day, I remember that WiFi indicators would look different if you have WiFi with internet access, but not connected to Google accounts (or have issues).
I know this is different than what we initially talked about; but I guess we're eliminating possibilities.
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Click to collapse
Update: My phone works fine on 5.1 ghz bands but not 2.4 bands. Very weird...

[Q] Wifi keeps reconnecting

My S4 keeps reconnecting to my wifi for some reason. I get the toast notification saying "Connected to <SSID>" that will sometimes pop up every 5-30 seconds, but it never goes more than 30 minutes without doing it. My router is an Asus RT-AC66U. I've tried forcing 2.4Ghz only, 5Ghz only, changing the preamble (short, long, auto), changing the channel (manually specifying each channel, and also tried auto), and even manually assigning an IP address on the phone. None of these things help.
I have "check for internet service" under the advanced wifi options disabled, and also have it set to keep wifi on during sleep.
The phone shows Very Good signal quality. Using wifi analyzer shows a signal strength of between -45 to -68 db, depending on what room I'm in, so that's definitely not the issue. It even does it sitting in the same room as the router. No other devices have an issue, including my roommate's S3.
I can fix it by turning off wifi power save mode (*#0011#), but then my phone heats up quite a bit whenever I'm using it, and my battery drains at 10%/hour even when I'm not connected to wifi. So that's not really a solution.
Is there any other fix for this? It's a bit ridiculous. I'll load a webpage and it'll interrupt halfway through when it re-connects to wifi. Since it keeps reconnecting to wifi, it causes all the phone's connections to be re-initiated, and also seems to trigger Google Services to update the phone's location. This results in Google Services (NetworkLocationLocator) holding a wakelock for 1/3 of the time.

So it seems the problem was IPv6, specifically IPv6 that autoconfigures. All the wifi networks I typically use are dual stack IPv4/IPv6. What I'm guessing happens is that the phone doesn't wake up for some of the IPv6 broadcasts, and then the phone reconnects to fix this once it realizes it's out of sync. Turning off power save mode means it gets all these packets and doesn't have to reconnect.
So I fixed it by having Tasker disable IPv6 on wifi whenever it connects to a wifi network (it's re-enabled if you disable wifi or reboot). Run this as root:
echo 1 > /proc/sys/net/ipv6/conf/wlan0/disable_ipv6
I wonder if this is just a bug in the chipset, or if it's a driver issue that can be fixed in a later update.

I had the exact same issue with mine (same router) and solved it by disabling WMM APSD in the router settings. Wireless>professional tab>5GHz drop down box>Enable WMM APSD>Disable.
A guy in the other GS4 Q&A forum gave me this solution and I haven't had an issue with it since.

I have this same issue... so when my Wi-Fi is dropping like that, I disable the Wi-Fi power save mode by dialing *#0011# then pushing the menu button and selecting the Wi-Fi option from the pop-up, the psm button is there. Fixes it every time, doesn't stick thru a reboot tho.
Sent from my SPH-L720 using xda app-developers app

Ingenium13 said:
So it seems the problem was IPv6, specifically IPv6 that autoconfigures. All the wifi networks I typically use are dual stack IPv4/IPv6. What I'm guessing happens is that the phone doesn't wake up for some of the IPv6 broadcasts, and then the phone reconnects to fix this once it realizes it's out of sync. Turning off power save mode means it gets all these packets and doesn't have to reconnect.
So I fixed it by having Tasker disable IPv6 on wifi whenever it connects to a wifi network (it's re-enabled if you disable wifi or reboot). Run this as root:
echo 1 > /proc/sys/net/ipv6/conf/wlan0/disable_ipv6
I wonder if this is just a bug in the chipset, or if it's a driver issue that can be fixed in a later update.
Click to expand...
Click to collapse
Hello, I'm having the same problem but I'm new to Tasker and don't know where to put that command. Would you mind showing me how to implement it please? Thanks.
Edit: Nevermind, I think I figured it out.

S4 will not store setwork
I'm running SACS Custom 7.1 with Faux kernal, and since I update to 7.1 from v7, my phone doesn't save any wifi profiles I connect to. Another thing I've noticed is no image shows up when recieving a call, so I have no idea who is calling. I got a 3rd party caller id from the market to fix that, but still a strange issue.
I am experianced with phones, but haven't posed enough here to post in SACs page, so any ideas would be helpful.
I tried looking at settings from 3minit or XPOSED, but nothing has changed since V7, so I'm wondering where to look.
The wifi profile shows up in data/misc/wifi/wpa_supplicant.conf, but only the one I am connected to at the time. If i disconnect and reconnect I need to re-enter the password.
Not important but annoying.
Thanks for your help in advance, you guys are awesome!

ace1134 said:
I'm running SACS Custom 7.1 with Faux kernal, and since I update to 7.1 from v7, my phone doesn't save any wifi profiles I connect to. Another thing I've noticed is no image shows up when recieving a call, so I have no idea who is calling. I got a 3rd party caller id from the market to fix that, but still a strange issue.
I am experianced with phones, but haven't posed enough here to post in SACs page, so any ideas would be helpful.
I tried looking at settings from 3minit or XPOSED, but nothing has changed since V7, so I'm wondering where to look.
The wifi profile shows up in data/misc/wifi/wpa_supplicant.conf, but only the one I am connected to at the time. If i disconnect and reconnect I need to re-enter the password.
Not important but annoying.
Thanks for your help in advance, you guys are awesome!
Click to expand...
Click to collapse
Wifi issue is faux kernel flash a different kernel. A module from xpose is the culprit sorry I forgot which one was it. To solve all your problems just do a clean install of v7.1 and when doing that make sure you click stock kernel or flash a preferred kernel. I dont use xpose so I dont have that problem so its your choice if you want to use it just read like 10 pages from the thread to find your answer.
Sent from my SPH-L720 using xda app-developers app

bender beerman said:
I have this same issue... so when my Wi-Fi is dropping like that, I disable the Wi-Fi power save mode by dialing *#0011# then pushing the menu button and selecting the Wi-Fi option from the pop-up, the psm button is there. Fixes it every time, doesn't stick thru a reboot tho.
Sent from my SPH-L720 using xda app-developers app
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I have to do this same thing and it works for me perfectly. A little bit of a hassle after reboots, but it works. I sent this to Samsung and they've opened a ticket on it (reportedly) to be addressed as they've had a lot of complaints about WiFi areas with multiple Access Points.

Wifi Not Working Correctly?

I tried searching and I have not found a solution yet. I'm running SHOstock-I with ktoonz kernel on android 4.4.2.
For some reason, my Wifi randomly disconnects from any currently connected wifi network. The first thing I try to do is to connect back to the wifi network (any available network), but it simply tries and says "Connection Failed". Next, I try to disable the wifi connectivity alltogether, but after I tap the toggle button it becomes "greyed-out" and I can't toggle it.. it just hangs. If I go back a step and then select wifi again, then I can try to disable it but the same thing just happens again.
If I reboot, then wifi works again.
Oddly enough, if I enable/disable teathering, then wifi starts to work again.
It seems I can't run Wifi for more than an hour without this issue happening. It seems to have just started doing this out of the blue. I suspect a full wipe would solve the issue but I'd rather not do that unless I have to. It usually takes me a while to get things back to normal after a wipe.
Any ideas?

Some solved the problem by unInstalling the Smart Wifi utility (for ATT and maybe other carriers too).
Read last 3 comments here: http://www.gottabemobile.com/2013/05/16/how-to-fix-samsung-galaxy-s4-wifi-problems/

horangeh said:
Some solved the problem by unInstalling the Smart Wifi utility (for ATT and maybe other carriers too).
Read last 3 comments here: http://www.gottabemobile.com/2013/05/16/how-to-fix-samsung-galaxy-s4-wifi-problems/
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Click to collapse
Thanks, but I don't have that app installed. I am positive this is not a router issue as well.
Everytime I wipe cache/delvik then the issue doesn't occur for a few days, which I think is odd. I also tried different kernels and the problem persisted.
Does anyone know if it's possible to confirm if this is a hardware issue? I doubt it...
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

It is a good idea to turn off any 'connection optimizer' or 'wifi optimizer' application or setting, in short anything that decides what connection is selected based on available connections should be turned off. The most probable reason for the problem is badly programmed software.

Wi-Fi Connected, No Internet but it does have a connection issue

After flashing the 7.0 BTU I have experiencing this issue where I connect to any Wi-Fi network and sometimes it works normal, and shows the icon as normal (Connected) but most of the times both under Connections and the Wi-Fi icon show Connected, no internet even though I do have and can use the internet connection but when it's like this it gets kinda slower, thought it might be an issue with my router but turns out it does the same on other Wi-Fi connections, anyone experiencing this? know of a fix?

daLareid said:
After flashing the 7.0 BTU I have experiencing this issue where I connect to any Wi-Fi network and sometimes it works normal, and shows the icon as normal (Connected) but most of the times both under Connections and the Wi-Fi icon show Connected, no internet even though I do have and can use the internet connection but when it's like this it gets kinda slower, thought it might be an issue with my router but turns out it does the same on other Wi-Fi connections, anyone experiencing this? know of a fix?
Click to expand...
Click to collapse
Factory reset/ wipe cache via stock recovery.
Sent from my SM-G935F using Tapatalk

Same for me
I am runnimg Renovate Nougat and my Wifi icon always has an exclamation mark, Wifi being "connected,no internet", but i can browse etc as normal.
Did you try a factory reset? Did it work?

daLareid said:
After flashing the 7.0 BTU I have experiencing this issue where I connect to any Wi-Fi network and sometimes it works normal, and shows the icon as normal (Connected) but most of the times both under Connections and the Wi-Fi icon show Connected, no internet even though I do have and can use the internet connection but when it's like this it gets kinda slower, thought it might be an issue with my router but turns out it does the same on other Wi-Fi connections, anyone experiencing this? know of a fix?
Click to expand...
Click to collapse
It happen to me after updating to nougat. I just forget the network and register it again. No problem after that.
Sent from my SM-G935F using Tapatalk

edan1979 said:
It happen to me after updating to nougat. I just forget the network and register it again. No problem after that.
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
I did that and it didn't help, but it's been working alright without factory reset, seems like it might have been an issue with my router after all.

Solved
I did a clean install of Renovate Nougat r85, no change. I noticed that it was OK until all the apps were installed. After a bit of investigation discovered it was due to AdBlock Plus. Removed it all OK, reinstall and back comes exclamation mark and "connected, no internet".

-snip-

-snip-
Sent from S7 Edge

The fix for "Connected, no internet" for me was to disable MU-MIMO on the router (Linksys). After logging in to your router's web admin interface, manually change the URL from "home.html" to "advanced-wireless.html". Look on the available tabs for the option to disable MU-MIMO. I disabled MU-MIMO and now my Samsung S7 Edge stays connected perfectly.