WIFI disconnected after long sleep? - Samsung Galaxy Tab S4 Questions & Answers

I got my S4 a couple days before. It is an LTE version, but I disabled 4G connection temporarily.
Yesterday, I noticed that, in some cases (maybe most of the time), after a long time of sleep, I could not get any notifications from the internet, I test with GMAIL and outlook, also WeChat, and WhatsApp.
And once I turn the screen, the notifications jumps out.
Does S4 turn off wifi in sleeping mode?
I used to have this problem with my phone, sony XZP, and I have after I set the "WIFI always on", it seems Ok.
I can't find wifi always on options in my S4's setting.
Does anyone have this same issue? And any suggestion to solve it?
thanks.

I have the same thing, non LTE model, just Wi-Fi version. When screen turns on, all the notifications pops up.

Same here, LTE model, WIFI disconnects after a few minutes.

I believe the WIFI is turned off during screen is off --- when I unlock the screen if I left wechat open before lock, wechat shows "network unavailable" or something like that, although the WIFI icon on the status bar is shown correctly.

I have a WiFi issue on mine, have sent it in to Samsung once already and they sent it back saying it was fine.
Mine will lose connection to WiFi completely and will sit forever searching for a network.
I have to reboot it in order to get it to connect again.
I'm going to send it back to Samsung and request a new one.
The pics are of how long I waited before rebooting it last night after getting it back from Samsung yesterday.
I have to take s3's and one has the same issue.
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deh2002 said:
I have a WiFi issue on mine, have sent it in to Samsung once already and they sent it back saying it was fine.
Mine will lose connection to WiFi completely and will sit forever searching for a network.
I have to reboot it in order to get it to connect again.
I'm going to send it back to Samsung and request a new one.
The pics are of how long I waited before rebooting it last night after getting it back from Samsung yesterday.
I have to take s3's and one has the same issue.View attachment 4613185View attachment 4613186
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Click to expand...
Click to collapse
Meant 2 tab s3's one of which has the same issue.
Meanwhile I can have my pixel c right beside it and the WiFi works perfectly on it.
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Related

[APP][LTE] Wifi tether for root users - WORKING!

A big thanks goes out to them for fixing this so quickly.
Updated Wifi Tether! Download here:
http://android-wifi-tether.googlecode.com/files/wifi_tether_v3_1-beta9.apk
Edit: Make sure you select Galaxy Nexus 4G_LTE under device profile
What's new:
Data statistics are now fixed
Random FC/Reboot after shutting off tether should be fixed
WPA2 issues should be fixed.
Awesome glad its up and running
Sweet. Thanks for letting us know OP!
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LTE wifi anyone?
THANKS SO MUCH!
This is from my laptop tethered...
From the development thread (can't post a url yet since I'm a newb) there seem to be a few bugs:
Widely confirmed is that total data use since last reboot is reported, not session use.
Some people have reported random reboots after shutting down tethering.
Mixed success in setting up a secure wifi connection.
All that being said, I am incredibly happy to see development on the LTE version moving ahead so quickly.
I'm getting this message when running it, and then a force-reboot. Hopefully it will be fixed soon.
Now if only they can get it to work in ad hoc mode. Yeah I know its not as good but I need it at work.
aatrek said:
I'm getting this message when running it, and then a force-reboot. Hopefully it will be fixed soon.
Click to expand...
Click to collapse
Did you set your device profile as Samsung Galaxy Nexus LTE? It works fine for me.
Everything worked for me just fine on LTE Galaxy Nexus after setting the profile to the correct device. Haven't tried encryption though.
Sorry if this is a stupid question but does this let you tether without having the data plan for it? Is there any chance Verizon can catch this?
azn android said:
Sorry if this is a stupid question but does this let you tether without having the data plan for it? Is there any chance Verizon can catch this?
Click to expand...
Click to collapse
Yes and No!!
Have fun!
Work great; no issues at all. Thanks!
Thank you!!!
Froze up the first time I tried it. Wiped everything and reinstalled Android Revolution (not due to the tether issue) and tried it again with success. Thank you!
Restart on stop
Does anyone else have the problem where your phone restarts after stopping the tether?
My wifi tether keeps crapping out after about 10 minutes with security on, works fine without security. Is this a known issue?
---------- Post added at 10:01 AM ---------- Previous post was at 09:24 AM ----------
Am i the only one losing connection? I just downloaded ~300 mb of a file and then I see a message on my phone saying "Wifi tether has been granted SU permission" and it shut off. Is it something to do with the screen off settings? Or my SetCPU being clocked at 350mhz when screen is off?
tuxnerd said:
Does anyone else have the problem where your phone restarts after stopping the tether?
Click to expand...
Click to collapse
This happened to me today. I ran it for the first time today. Once I turned it off, my phone started the cycle with the Samsung startup screen. Once it was back on, I had no data connection. I thought the tethering app busted something, but it turns out VZW is/was having a massive 3G/4G data outage at the same time.
Anyone else have this restarting issue? I'm probably not going to run the wi-fi tethering app again if that's going to happen.
Works great here. Thanks!
Very nice and has worked perfectly for me. I'm suprised this was not on the first page of the App forum.

[Q] GPS on for no reason since Android 4.1.2 upgrade

Hi -- Ever since the OTA to Android 4.1.2, I'm seeing my Galaxy Nexus trying to get a GPS lock for no apparent reason. It will happen on start-up (even with no mapping application running) and will stay on until I either reboot the phone or uncheck "GPS satellites" under the "Location access" setting. Is anyone else seeing this? Or have any idea why this would be happening? It wasn't an issue on 4.1.1, and it started immediately when the phone rebooted after the upgrade.
Alan
carrot34 said:
Hi -- Ever since the OTA to Android 4.1.2, I'm seeing my Galaxy Nexus trying to get a GPS lock for no apparent reason. It will happen on start-up (even with no mapping application running) and will stay on until I either reboot the phone or uncheck "GPS satellites" under the "Location access" setting. Is anyone else seeing this? Or have any idea why this would be happening? It wasn't an issue on 4.1.1, and it started immediately when the phone rebooted after the upgrade.
Alan
Click to expand...
Click to collapse
I'm having the same issue. Did you find a fix for it?
bplewis24 said:
I'm having the same issue. Did you find a fix for it?
Click to expand...
Click to collapse
Well, yes and no -- I didn't figure anything out, but the problem hasn't happened for a few days. I'm keeping my fingers crossed that it won't come back! When last it happened, I powered the phone off and then restarted, and all seemed OK.
It could be Google now trying to use the GPS to better track your location. I keep GPS off unless in use so I can't say I've experienced this.
Sent via moon rays...
I think it does it in case of starting a navigation app. Try turning it on only when needed and you will save some battery
Can somebody tell me how to fix the GPS location? It can't lock me... I tried the uncheck-check google locations but with no result Thought 4.1.2 will fix it but it didn't :crying:
Pull the battery, 1 minute.
Sent from my AT100 using xda app-developers app
carrot34 said:
Hi -- Ever since the OTA to Android 4.1.2, I'm seeing my Galaxy Nexus trying to get a GPS lock for no apparent reason. It will happen on start-up (even with no mapping application running) and will stay on until I either reboot the phone or uncheck "GPS satellites" under the "Location access" setting. Is anyone else seeing this? Or have any idea why this would be happening? It wasn't an issue on 4.1.1, and it started immediately when the phone rebooted after the upgrade.
Alan
Click to expand...
Click to collapse
you have tried to disable "google now"? the cards can be
charge your phone completely, unplug it, reboot it.
let the magic happen and the mysterious GPS locking procedure happen. after some time, jump into settings -> battery. check all listed apps for usage of GPS, like in the screenshot below...
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And after doing that, what... still no lock. GPS Status app cannot get a lock... got few GPS satellites with 22 to 29 beside them. Is that the strength of the signal?

WiFi Problem

i have use ZL for almost 3 months and today im having an issue about wifi..
yesterday my wifi working good without any problem but today it started to make me change to "freak mode"..
Everytime in my office i will use the office network just avoid my phone data usage exceed its limit..
when i turn on my wifi.. it notify me for an open network but when i tried to connect. it failed.
Even more weirder when i try to forget the network. i also got an error that network can't be forgetted. so there's must be something wrong here..
here some screenies i attached..
When i turn wifi on..
View attachment 2124436
then nothing happened.. it wont connect at all..
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so i go to setting, wifi setting and try to connect it manually.. and this what i've got..
i tries to reboot my phone and it wont fix it.. so i try to forget the network and its weird because i got this message:
so is this because i got a hardware issue on my ZL? or is this because of Sony 4.2.2 CrappyBean software?
any other way how to fix this problem? please help me..
Sent from my C6502 using xda app-developers app
daniLaLaLaLaLa said:
i have use ZL for almost 3 months and today im having an issue about wifi..
yesterday my wifi working good without any problem but today it started to make me change to "freak mode"..
Everytime in my office i will use the office network just avoid my phone data usage exceed its limit..
when i turn on my wifi.. it notify me for an open network but when i tried to connect. it failed.
Even more weirder when i try to forget the network. i also got an error that network can't be forgetted. so there's must be something wrong here..
here some screenies i attached..
When i turn wifi on..
View attachment 2124436
then nothing happened.. it wont connect at all..
View attachment 2124438
so i go to setting, wifi setting and try to connect it manually.. and this what i've got..
View attachment 2124442
i tries to reboot my phone and it wont fix it.. so i try to forget the network and its weird because i got this message:
View attachment 2124449
so is this because i got a hardware issue on my ZL? or is this because of Sony 4.2.2 CrappyBean software?
any other way how to fix this problem? please help me..
Sent from my C6502 using xda app-developers app
Click to expand...
Click to collapse
Hello, check on Power Management and turn off stamina, low battery mode and location based WI-Fi. see if it helps. if it does, maybe you set some things to make the battery last much longer.
danieldp1990 said:
Hello, check on Power Management and turn off stamina, low battery mode and location based WI-Fi. see if it helps. if it does, maybe you set some things to make the battery last much longer.
Click to expand...
Click to collapse
thanks for that feedback.. i already tried and the problem still exist..
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It says 3G, but it's lying.

Over the passed couple of weeks I've been noticing an issue more and more that once had seldom bothered me. I'm currently the owner of a Sprint Samsung Galaxy Nexus running Cyanogenmod 10.1. For some odd reason, my data connection indicator will indicate that I have usually 2-3 (blue) bars of 3G, but will never actually connect to the internet until I force it to. Let me explain.
Recently I've been involved in a few Group MMS chats with people from work and what not. For whatever reason, I will only receive other's messages in large chunks. Messages (sometimes full conversations) that were sent over the period of a few minutes, all arrive out of sync at the same time; blowing up my phone with notifications. I then have to sort through and piece together the conversation to see what actually happened. I've noticed that 90% of the time my phone will be sitting there with the signal strength indicator that looks like this:
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And I won't receive any MMS messages. Then I noticed that if I launch an app that requires data my signal strength indicator will look like this:
And Voila! I'll receive all the messages I missed since I last sent my own MMS or launched Facebook or something. Why must I manually force the phone to connect to data (show the upsteam/downstream arrows) when it indicates that it's constantly connected to 3G? It's as if the data goes into some kind of sleep mode and then never wakes up until I force it to.
Please note: This occurs while sitting in the same spot (no just while on the move, which would be a bit more acceptable). I've tried updating my PRL and Data Profile. I've obviously rebooted the phone multiple times over the passed few days. All Mobile Data and Data Roaming toggles are ON (Unlimited data and roaming, so why not?). Network Mode is set to: LTE/CDMA. Wi-Fi does not seem to rectify or exacerbate the issue. I have not touched the Cyanogenmod default APNs.
What is causing this? Anyone else having the same issue?
I don't think your phone is"lying" MMS is a known problem on Sprint
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CRIME INC. said:
I don't think your phone is"lying" MMS is a known problem on Sprint
Sent from my Galaxy Nexus using Tapatalk 2
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Click to collapse
...Among other things lol.
CRIME INC. said:
I don't think your phone is"lying" MMS is a known problem on Sprint
Sent from my Galaxy Nexus using Tapatalk 2
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Click to collapse
jimmyco2008 said:
...Among other things lol.
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Carrier fails but replies "oh yes, it most certainly works on our side, must be something wrong with your device. please return it for warranty".

Slow W-Fi on Marshmallow

Ok, tried this in a couple of Marshmallow ROM threads and found just one other person who experiences the same, so I decided to make a thread and maybe find a solution or at least the cause for my problem.
I tried several new 20A Marshmallow ROMs on my H815 EUR G4 and always get the same slow Wi-Fi speeds problem. I notice it the most in Google Play And Youtube load times but also in the browser. When I fire up YouTube I usually have to wait between 5 and 10 seconds for the content to show up. Similiar is with Google Play when I have to wait for the graphics, app thumbs and stuff to show up.
As soon as I switch to Mobile data it flies, and yes, I tried it on another Wi-Fi spots. it's the same. When I go back to lollipop it flies. WTF?
One thing I notice is when my phone on MM first connects to Wi-Fi connection it briefly shows an exclamation mark which disappears in a few seconds.
If someone has any idea what this could be causing, i would appreciate it.
Thanks
I would guess it has to do with DNS requesting, maybe on wifi you have custom DNS servers ? (which you can't change on mobile, you're bound to your carrier's ones)
maybe also your router quite does not like seeing you phone with some settings (firewall ? other ?) bound to the lolipop version of the phone, and just after that the same MAC adress with other settings (MM) => have you tried to reboot / reset your router ?
thorcyar said:
I would guess it has to do with DNS requesting, maybe on wifi you have custom DNS servers ? (which you can't change on mobile, you're bound to your carrier's ones)
maybe also your router quite does not like seeing you phone with some settings (firewall ? other ?) bound to the lolipop version of the phone, and just after that the same MAC adress with other settings (MM) => have you tried to reboot / reset your router ?
Click to expand...
Click to collapse
Ofcourse. I also tried connecting to my friend's router an it's the same. Really crazy...
Sent from my LG-H815 using Tapatalk
I have just installed MM, and I experience 'hangs' when on Wi-Fi.
Same issue here - any idea on how to fix that?
Update: the problem only seems to occur, when Bluetooth is on *confused*
WiFi is just bloody awful on this phone
Same here. It's annoying!
Tried with several Wifi-networks.
Did 3 hard-resets. After these wifi is ok for 2-3 days. then broken again. Ping-times at 2-3 seconds (!).
Please see my other post here.
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No problems for me, it works fine. Stock 6.0, locked bootloader.
Some issues may appear if the router changes the channel, but otherwise it's fine.
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KoRoZIV said:
No problems for me, it works fine. Stock 6.0, locked bootloader.
Some issues may appear if the router changes the channel, but otherwise it's fine.
Sent from my LG-H815 using Tapatalk
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Ouch ! Nice score ! Your router must be AC no ?
Yes, an asus ac56u. Not the best out there but enough for me.
Sent from my LG-H815 using Tapatalk
Hi,
i have the same problem, after install MM all seems to be good for 1 day, then broken.
No solution? anyone contacted LG?
giopego said:
Hi,
i have the same problem, after install MM all seems to be good for 1 day, then broken.
No solution? anyone contacted LG?
Click to expand...
Click to collapse
As said before. Disabling Bluetooth (for a while) fixed this for me.
Since weeks now no problems.

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