Database Users

[Help][Urgent]WiFi won't turn on

Hi there!
I'm having a really bad problem at the moment on my s4 (i9505). Recently I upgraded from stock (MDE) to pre-rooted (MF8). Since then, my WiFi has stopped working, and it seems to be the only thing that has gone wrong. When I toggle WiFi on, it immediately toggles off (both in the quick settings, and through the settings panel). When I mean immediately, I mean within 1/10 of a second.
I flashed another ROM over it (OMEGA V7) and nothing changed.
I feel as though I've missed something vital, and would rather work on a fix for it rather than flash stock through Odin and start from scratch. Any help is very much appreciated.

Check settings in WiFi. There is an option for using cell or WiFi based on which one is faster, disable it.
Sent from my HTC One using xda app-developers app

c5satellite2 said:
Check settings in WiFi. There is an option for using cell or WiFi based on which one is faster, disable it.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
Thanks for the quick reply.
I already had that off (selected off by default).

Also check if your wifi timer is on.
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Also check if your wifi timer is on.
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
No WiFi timer is also off.
This is very strange, I've searched google for hours and absolutely nothing like the issue I'm having.

Flash correct kernel
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xxshabsxx said:
No WiFi timer is also off.
This is very strange, I've searched google for hours and absolutely nothing like the issue I'm having.
Click to expand...
Click to collapse
Ive had this issue before when my kernel and modem are mismatched but also when a weird setting is enabled... and I cant remember what it is.
Try a factory reset but do not restore your phone settings from google... only your contacts
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Ive had this issue before when my kernel and modem are mismatched but also when a weird setting is enabled... and I cant remember what it is.
Try a factory reset but do not restore your phone settings from google... only your contacts
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
Yeah just flashed stock through odin and did a factory reset.
Still not working. Really lost, and rather worried right now.

xxshabsxx said:
Yeah just flashed stock through odin and did a factory reset.
Still not working. Really lost, and rather worried right now.
Click to expand...
Click to collapse
So wifi will not turn on no mattrr what ?
And your not in airplane mode ?
This is beyond me then... I hope your hardware wasnt messed up.
Does your wifi still have a mac address ?
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
So wifi will not turn on no mattrr what ?
And your not in airplane mode ?
This is beyond me then... I hope your hardware wasnt messed up.
Does your wifi still have a mac address ?
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
Not in Airplane mode.
I still have a mac adress.
No idea what's wrong. I literally JUST flashed a ROM. I've been doing this for almost 3 years and never have I seen an issue like this.
Might take the phone back.

xxshabsxx said:
Not in Airplane mode.
I still have a mac adress.
No idea what's wrong. I literally JUST flashed a ROM. I've been doing this for almost 3 years and never have I seen an issue like this.
Might take the phone back.
Click to expand...
Click to collapse
Something got messed up.
Sent from my GT-I9500 using Tapatalk 2

Gillion said:
Something got messed up.
Sent from my GT-I9500 using Tapatalk 2
Click to expand...
Click to collapse
I can't really say why this happens but a lot of times with this phone it seems that the MAC address to the wifi is somehow lost and by removing the /data/.cid.info file you can somehow reset something that makes things work again. I assume it's somehow tight to different wifi network chip drivers in different kernels but I'm not sure. On some ROM's I have tried I have to do this on every boot...

http://forum.xda-developers.com/showthread.php?t=2357471

Wifi Issues

Hi All,
Has anyone else brrn having issue with wifi connections on phone?
UK 3 Network / CSC H3G
Sent from my SM-N9005 using Tapatalk 2

yup.. constantly dropping signal..
already put in a request to get mine exchanged .. EE btw

Is it a phone or software issue?
Sent from my SM-N9005 using Tapatalk 2

Had the same issue. I get an error something to effect of "Wifi disconnected because internet is connection is slow". I seemed to correct it by going to Wifi advanced settings and unticking box for Always Allow Scanning and Auto Network Switch.

Is this similar to the 4.2 note 2 issues?
Sent from my SM-N9005 using Tapatalk 2

not really sure what the note 2 issue was?

Unable to connect/dropping connection. I have trued the mentioned fix in themread and srems to work
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DemolitionManHD said:
Unable to connect/dropping connection. I have trued the mentioned fix in themread and srems to work
Click to expand...
Click to collapse
Wow... at least glance back and see if SOME of the letters you're pressing are correct... lol

Lol
Sent from my SM-N9005 using Tapatalk 2

[Q] Why is Android OS draining so much?

http://imgur.com/a/yniII
Why is it that android is 2nd just after screen in eating battery? What's wrong?
I have disabled sync and turned off the various samsung apps which do syncing in the background. What else am i missing? NFC, etc are all turned off

Welcome in the club
It called AndroidOS Bug and Google play services Bug.
Please search for it, and you'll find the answer.
No really solution about this **** :-/
So many Threads about the same problem.
Gesendet von meinem SM-N9005 mit Tapatalk

buell47 said:
Welcome in the club
It called AndroidOS Bug and Google play services Bug.
Please search for it, and you'll find the answer.
No really solution about this **** :-/
So many Threads about the same problem.
Gesendet von meinem SM-N9005 mit Tapatalk
Click to expand...
Click to collapse
so basically wait till the next update but till then my battery is ****?

kylexda12 said:
so basically wait till the next update but till then my battery is ****?
Click to expand...
Click to collapse
You can try the recommended solutions if you see that your accu is draining by AndroidOS.
But they are only temporally.
Sometimes Restart help, if not, clear Google play services CACHE, shut down and remove accu for short time.
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buell47 said:
You can try the recommended solutions if you see that your accu is draining by AndroidOS.
But they are only temporally.
Sometimes Restart help, if not, clear Google play services CACHE, shut down and remove accu for short time.
Gesendet von meinem SM-N9005 mit Tapatalk
Click to expand...
Click to collapse
what is accu?

kylexda12 said:
what is accu?
Click to expand...
Click to collapse
he means accu=battery

German Akku = battery in english
hit 'thanks' if i helped you
SM-N9005 DBT-DMJ7 0x0
XDA Developers 4 premium app

Killberty said:
German Akku = battery in english
hit 'thanks' if i helped you
SM-N9005 DBT-DMJ7 0x0
XDA Developers 4 premium app
Click to expand...
Click to collapse
oh lol ok thanks.
Any other tips aside from these? This is really a problem that's firmware related?

kylexda12 said:
oh lol ok thanks.
Any other tips aside from these? This is really a problem that's firmware related?
Click to expand...
Click to collapse
I'm not sure that it is. Sometimes my battery runs out really fast, just a day
Sometimes it Lasts really well.
It's horribly unpredictable, but I don't think it's firmware. A firmware problem would be consistent.
Currently my battery is at 55% and it's been running 1 day 19 hours. Same usage as normal.
Sent from my GT-N8000 using XDA Premium HD app

OT
Never learned English at school :-\
My fault, thought.... never need that stupid language
Sorry, now I know.... I was very stupid to ignore what my teacher told me
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have u do a factory reset after update ? i had do a factory reset through setting but problem still occur. i will try to do factory reset in recovery mode to check whether it solve or not. btw, what is the difference between do a factory reset in setting and do it in recovery mode ? which one is better ?

No, I didn't reset it after Update, because I do it few days before. I try first the reset in settings. Bug already exists. Then I used the recovery menu, clear cache and do a factory reset. Same Bug comes few hours later back.
I read in German forum that other people do the same after the new update, but same s h i t with AndroidOS comes again.
After I read this I tried no factory reset by myself.
I don't know there is any different between booth ways to reset your device
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buell47 said:
No, I didn't reset it after Update, because I do it few days before. I try first the reset in settings. Bug already exists. Then I used the recovery menu, clear cache and do a factory reset. Same Bug cones few hours later back.
I read in German forum that other people do the same after the new update, but same s h i t with AndroidOS comes again.
After I read this I tried no factory reset by myself.
I don't know there is any different between booth ways to reset your device
Gesendet von meinem SM-N9005 mit Tapatalk
Click to expand...
Click to collapse
same thing as you. I factory resetted and everything, but it seems that MJ7 is just ****

kylexda12 said:
same thing as you. I factory resetted and everything, but it seems that MJ7 is just ****
Click to expand...
Click to collapse
Yes, I think the MJ7 has a bug since few weeks ago at the point, where Google is updated any f....ing Service in the Background.
I don't know, maybe the NSA need a full Copy off all calls, messages and location movements every second, not only in 15 Minutes steps!? :-/
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Am in MK2 and facing the same problem with Android OS

Dahdoul said:
Am in MK2 and facing the same problem with Android OS
Click to expand...
Click to collapse
okay...i never used MK2 in Germany.
I have my Note 3 since 29.08.2013 without problems! Nothing changed last 4 weeks!
Few days ago i realized the battery drain issue, because i dont use the phone, but battery goes down.
I look in the battery infomation, the AndroidOS is now on top of all Apps and Services that running the whole day

The easiest way to fix this until a new firmware is released is to disable "Use Wireless Networks" under "Location Services". This has fixed mine for the past couple of weeks. As soon as I turn it back on, battery life sucks!

Sword Fish said:
The easiest way to fix this until a new firmware is released is to disable "Use Wireless Networks" under "Location Services". This has fixed mine for the past couple of weeks. As soon as I turn it back on, battery life sucks!
Click to expand...
Click to collapse
Holy cow, thanks for this tip! Made a huge difference on my phone.

brildenlanch said:
Holy cow, thanks for this tip! Made a huge difference on my phone.
Click to expand...
Click to collapse
In my experience this is not a solution to the bug that the OP is writing about and which makes so many people lose their mind over the ridiculous battery drain.
Tried though (because it was turned on for some reason) and will look what my battery says tomorrow morning (not charging over night).

I have a thread here helping on this issue. Cheers!
http://forum.xda-developers.com/showthread.php?t=2579075

Wifi and data switch off randomly.

Have noticed about once a day at random times, my wifi and data signal will disappear when using the phone. I have to switch airplane mode on and back off to get my connections back. Not a major Issue, but slightly annoying.
Anyone else have this problem or know the cause?
Sent from my SM-G900F using Tapatalk

simacca said:
Have noticed about once a day at random times, my wifi and data signal will disappear when using the phone. I have to switch airplane mode on and back off to get my connections back. Not a major Issue, but slightly annoying.
Anyone else have this problem or know the cause?
Sent from my SM-G900F using Tapatalk
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Click to collapse
I'm having an issue where my wifi icon disappears but I'm still connected to wifi. Also, the toggle is grayed out. Pretty annoying. I'm on the Sprint GS5.

jhuff83 said:
I'm having an issue where my wifi icon disappears but I'm still connected to wifi. Also, the toggle is grayed out. Pretty annoying. I'm on the Sprint GS5.
Click to expand...
Click to collapse
The toggle is greyed out on mine too and cannot switch it back on. The only difference is that I loose wifi and network connection. Mine is o2 UK unbranded handset.
Update: my connections are still active when this happens.
Sent from my SM-G900F using Tapatalk

I'm getting the same thing here, the data and wifi icons occasionally disappear and the wifi toggle goes dark (as if it's not connected), but I'm still connected and get data just fine.

Do you reckon this is a hardware or software fault?
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simacca said:
Do you reckon this is a hardware or software fault?
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
I would think software.
Sent from my SM-G900P using Tapatalk

I have to this problem. Any fix ?

koko115 said:
I have to this problem. Any fix ?
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Click to collapse
Just as I read this comment it happened again lol. This time I did not loose connection though.
Would love to know the cause !!
Sent from my SM-G900F using Tapatalk

Think its Kitekat issue as I have it on my HTC m8 also
Sent from my HTC One_M8 using XDA Premium 4 mobile app

On my old galaxy s4 on kk i dont have this isue ?
And what samsung talk about this ?

Have now noticed that this is happening roughly the same time everyday.
Edit: update, Damn, it just happened again!!
Sent from my SM-G900F using Tapatalk

I had same problem on my G900f aften I installed an ad blocking app for non rooted Phone.
After deleting that non-working crap app.. Phone has not lost signal since.
Sent from my SM-G900F using XDA Premium 4 mobile app

joeherlev said:
I had same problem on my G900f aften I installed an ad blocking app for non rooted Phone.
After deleting that non-working crap app.. Phone has not lost signal since.
Sent from my SM-G900F using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I did install adblock (unrooted) for about 30 minutes and then removed it when I first got my phone. Not sure if the problem started before or after.
Sent from my SM-G900F using Tapatalk

Its not problem adaway. I test it.

Would be nice to find out the reason why this is happening.
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simacca said:
Would be nice to find out the reason why this is happening.
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
Is problem solved ??? Or you will have to factoory reset I think.

joeherlev said:
Is problem solved ??? Or you will have to factoory reset I think.
Click to expand...
Click to collapse
It didn't happen yesterday so will wait for next samsung update and see if that solves the problem. Unless it gets worse then I will factory reset.
update : shortly after I posted this it happened again so I tested the connection and I was still connected to wifi.
Sent from my SM-G900F using Tapatalk

simacca said:
It didn't happen yesterday so will wait for next samsung update and see if that solves the problem. Unless it gets worse then I will factory reset.
Sent from my SM-G900F using Tapatalk
Click to expand...
Click to collapse
Okay...
Did you find any working ADBLOCKER for non-rooted G900F ?

joeherlev said:
Okay...
Did you find any working ADBLOCKER for non-rooted G900F ?
Click to expand...
Click to collapse
No, I stopped looking as I think they only work properly if your rooted.
Sent from my SM-G900F using Tapatalk

What's the best way to perform a factory reset?
Update: Just performed a full factory restore. Will let you know how I get on.
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Wifi turning itself on

When I switch my wifi off at night with phone on charge, it turns itself on
Same if I have data on, I'll later see its switched to wifi (I have smart switch turned off)
Can anyone shed some light on this?
Sent from my SM-G935F using XDA-Developers mobile app

Same problem
inzimam said:
When I switch my wifi off at night with phone on charge, it turns itself on
Same if I have data on, I'll later see its switched to wifi (I have smart switch turned off)
Can anyone shed some light on this?
Sent from my SM-G935F using XDA-Developers mobile app
Click to expand...
Click to collapse
I'm having the same problem on the Sprint S7 edge, software version G935PVPU2APC5...mine seems to turn wifi on for no reason. Smart network switch is off here too. Frustrating when you don't want to connect to certain wifi spots.

I can't understand this behaviour. I also find when I get home my Bluetooth turns off!
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Funny I have been doubting myself many times thinking a forgot turning off my data at night. Getting angry at myself when I happen to be awake in the middle of the night after receiving some sort of notification.
I started setting silent mode lol
Strange behavior indeed!
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Bumping this
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Are you guys using "My Places"?

BWolf56 said:
Are you guys using "My Places"?
Click to expand...
Click to collapse
I don't
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I think my issue is relating to this. My UK S7 edge keeps changing to vibrate mode, but only when I have it on sound mode and not mute. Annoying when your'e asleep and a notification vibration wakes you up. Hopefully an update will sort this annoying bug quickly.

Found the solution (for me at least)
http://forums.androidcentral.com/showthread.php?t=660027
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