Database Develop

Is it normal for wifi to have constant data usage?

When wifi is turned on and the phone is otherwise idle, there is a constant but small stream of data up and down. I have NetCounter installed which monitors wifi as well as cell data. This morning, when I turned the phone on, with the wifi counter at zero, I enabled wifi and then just let it sit on the desk for 4 hours. At the end of four hours, there was a total of 3.83 MB of wifi data usage, 3.52 MB received and 320.7 KB sent. Also having wifi on when the phone is idle eats up the battery. Starting at 100%, at the end of the 4 hours the battery was down to 64%. With wifi off, after sitting idle for 4 hours it would still be above 90%.
By the way, the phone is now rooted with sre 1.3.1c and with lag fix installed, but the wifi has behaved the same from when the phone was new, and I ran it for about a month stock. I'm just curious if this is normal operation for wifi. I have read in other threads that some leave wifi on all day without much battery usage.
When I first got the phone, I thought that it might be some application running in the background that was causing the data usage, so I installed ATK and experimented with killing everything, but the data usage was constant. (I can also see the data usage on my router because the wifi light flashes continually when the phone's wifi in turned on, and is solid unflashing when the phone's wifi is turned off, assuming the laptop is not connected.) I was unable to stop the data usage by killing off applications.
Any ideas? Thanks.

Did you agree to send anonymous usage data to Google when you configured the phone?

Interesting thought. Normally I never send anyone any data, unless I'm forced to. Would the tech at the store have set this up? Where do I look to check?
Edit: if you mean "use wireless networks" in settings | location and security, it's usually on, but it doesn't make any difference to the wifi data usage if it is turned off.

Gmail does push email, so does exchange. Are either installed? Any widgets? Facebook accounts?
There are many core apps that use data, tell us more about your config and we can help pinpoint it.

I have the google and youtube widgets, the Android power control widget, and the juice defender and juice plotter widgets. The last three were installed after I started trying to find the solution to the wifi issue.
I have Gmail installed. However, Auto-sync is always unchecked, and even though I leave bacrkground data checked most of the time, if I uncheck it, even with a reboot, the wifi data still goes on.
Installed applications: AndExplorer, Any Cut, AutoKiller Memory Optimizer, Google voice, Grocery IQ, JuiceDefender, JuicePlotter, Listen, Maps, Market, My Tracks, NetCounter, OruxMaps, Quadrant Standard, Rom Manager, SL4A, Startup Auditor Free, Titanium Backup, XDA. All the root apps were installed recently.
Installed sre 1.3.1c recently, which removed samsung and at&t bolatware.
That's all I can think of for now. What else would be helpful to know about my configuration?

I don't see it on your list of installed apps but when I installed (ad supported) MailDroid, I noticed I got 4MB of data downloaded in 4 hours while the phone was sitting idle, charging (not even on WiFi. It was on my 3G!). When I Force Stop MailDroid, the data activity dropped to near zero.
Could it be some ad supported apps that run in the background? Data leaks?

I have the stock mail application, which retrieves mail from two accounts.
Grocery iQ has coupons. I use the program for inventory, so I never even look at the coupons page. Anyway, that app does not run in the background. You can't find any process associated with it unless you start the app from it's icon.
Startup Auditor has ads in it. I tried disabling it (with Startup Auditor) but that did not make any difference in the data, even after reboot. Anyway, that program was added since I've been working on this.
I don't think any of the other apps have ads in them.
One other thing I'll mention. There have been two occasions when the data stream stopped completely while wifi was still turned on, each time for a period of about 20 to 30 minutes. I could see this from the wifi activity indicator light on my router. This happened about two weeks apart. The more recent one was yesterday afternoon right after I made the OP of this thread. In both cases, I could not correlate what caused the data to stop, nor what caused it to start up again. But at least it seems to indicate that there is something causing the data to flow, and that it can be inactive while wifi is on.

are you sure its not another device that is using the wifi and not ur captivate

labbu63 said:
are you sure its not another device that is using the wifi and not ur captivate
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Yep. There's only the laptop and the phone. The laptop is on the ethernet connection, hard wired. The laptop has an on off switch for the wifi. It's off. Also, the indicator light goes solid when I turn off wifi on the phone, and starts up again when I enable wifi again.
Tonight I decided to put DG's Cognition on the phone. After I Oden3 one-clicked to stock UCJF6, I checked the wifi, and sure enough, still getting the constant data stream. When I bought the phone, I never really became aware of the problem until after I had loaded a number of apps. But here it is in the "just out of the box" state, and it already driving my router crazy.
So now I don't know what to think. Is this normal for all Captivate phones? Is this a hardware problem on this phone? Something else? Btw, the flash to cognition went smoothly, and the phone is running well, but the data stream is still there when wifi is on.

I wouldn't get all in a frenzy just because your router is blinking. Your router blinking doesn't mean your phone is downloading something. Install an app that monitors your wifi data usage. If it reports unusually high numbers then come back here.

gtg465x said:
I wouldn't get all in a frenzy just because your router is blinking. Your router blinking doesn't mean your phone is downloading something. Install an app that monitors your wifi data usage. If it reports unusually high numbers then come back here.
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Please read the OP and the whole thread. It isn't that long. True, while I was in the midst of flashing Cognition, I didn't take time to install NetCounter on the stock rom and take time to check the actual data flow. But the fact that there is actual data flowing when the indicator light is flashing is established.

I've uninstalled MailDroid because of the annoying ads (and because I thought it was doing unnecessary downloads at night). I woke up this morning and NetCounter shows 13MB of data downloaded for Today (from midnight to 6am). I suspect it's the 4 windows (tabs) I have opened in my Browser. Two of them were full (desktop) websites that have banner ads in them. Hmm...

Less than 1MB of data per hour is not a big deal. I'm sure it's a combination of apps that pull or sync data from the internet. Or it could just be an app you have installed that's downloading ads like RexEscape said.
Also, do you have the wifi sleep policy set to never? It should be set to never for best battery life.

RexEscape said:
I've uninstalled MailDroid because of the annoying ads (and because I thought it was doing unnecessary downloads at night). I woke up this morning and NetCounter shows 13MB of data downloaded for Today (from midnight to 6am). I suspect it's the 4 windows (tabs) I have opened in my Browser. Two of them were full (desktop) websites that have banner ads in them. Hmm...
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What do you show for data usage when your phone is idle but wifi is turned on, meaning nothing you know of would be using data? Would you mind doing a brief test like that? Thanks

gtg465x said:
Less than 1MB of data per hour is not a big deal. I'm sure it's a combination of apps that pull or sync data from the internet. Or it could just be an app you have installed that's downloading ads like RexEscape said.
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It appears to be drawing data without any apps installed. I assume that after flashing odin3 one-click to the stock rom, the phone is configured almost exactly like it would have been out of the box.
Also, do you have the wifi sleep policy set to never? It should be set to never for best battery life.
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Just checked it. It is set on Never now. I'm pretty sure it has been set on never since I first started trying to optomize battery life, and discovered the wifi issue.

gtg465x said:
Also, do you have the wifi sleep policy set to never? It should be set to never for best battery life.
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Where in the settings do I check this option??
dm

dwmoss said:
Where in the settings do I check this option??
dm
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Settings | Wireless and netowrk | Wi-Fi settings. Then press the menu button and select advanced.

creepyncrawly said:
Settings | Wireless and netowrk | Wi-Fi settings. Then press the menu button and select advanced.
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Thank you very much.

I hate to bring this one back from the dead but I am having the same issue. When watching network usage in SystemPanel, I am getting 0.6-0.2kbps up and down constantly. Then when I switch Wifi off, it sits on zero. That seems to indicate something directly related to the relationship between the phone and wireless routers and not a specific app or general setting. Any ideas? Thanks guys.

I also just noticed that under Wifi settings it will pop up saying "Scanning" every 2-3 seconds. It does it whether network notification is checked or not. Not sure if that is normal behavior or not.

Battery savings guide

Hello, i use Dalingrin's kernel (6/30) and CM7 nightlies (121 currently).
Sometimes deep sleep is nice for my battery, sometimes it doesn't save energy.
It's life but i need a few days between battery charging.
so i decided to add a few workarounds, here they are:
1. Airplane mode everytime + wifi on/off when i need it. Only ten seconds to activate/deactivate with CM7 status bar.
2. Battery widget monitor: it enables history of battery consuming. Very good to act that deep sleep is effective or not.
3. uninstall applications which sychronize when nook should be sleeping: K9, DSPmanager, hotapps, appbrainz.
3. Advanced task killer pro: Crazy mode when screen is off. Very nice for last applications.
Of course, you are welcome to comment those tricks and to add some

I guess it depends on use, but I'm on day 3 on a charge, running at 47%. I just have the screen at 15% most of the time, and I don't disable sync. I mostly do reader, email, internet, so that might be part of my success.

sebanoel said:
Hello, i use Dalingrin's kernel (6/30) and CM7 nightlies (121 currently).
Sometimes deep sleep is nice for my battery, sometimes it doesn't save energy.
It's life but i need a few days between battery charging.
so i decided to add a few workarounds, here they are:
1. Airplane mode everytime + wifi on/off when i need it. Only ten seconds to activate/deactivate with CM7 status bar.
2. Battery widget monitor: it enables history of battery consuming. Very good to act that deep sleep is effective or not.
3. uninstall applications which sychronize when nook should be sleeping: K9, DSPmanager, hotapps, appbrainz.
3. Advanced task killer pro: Crazy mode when screen is off. Very nice for last applications.
Of course, you are welcome to comment those tricks and to add some
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Click to collapse
1 is probably not a good idea, since sometimes Airplane mode sticks.
2 has nothing to do with saving battery, but okay..
3a does nothing if there is no network connection (assuming sanely written programs)
3b is stupid and shouldn't ever be used.
You want to save battery? Turn off wifi when the screen goes off. You can do this automatically with Setting Profile Lite or Tasker, probably some others. I've found that the wifi sleep setting doesn't do anything for me, I can continue to ping the NC for 10+ minutes after the screen goes off so clearly the wifi is still up.
And watch Spare Parts partial wake locks and see if you have any misbehaving apps. I find that Maps with Latitude enabled misbehaves without a network connection and constantly is trying to update or something, so I cleared data on Maps to get out of Latitude on that device. CPUSpy will also show you how much deep sleep is ongoing.
The NC is going to use at least 10%/hr at low backlight doing simple tasks, I've seen it use up to 25% overclocked playing games.
While asleep it uses about 1% every 3-4 hours. Could probably do even better if you don't have a boatload of apps and widgets like I do.

Grab "Where's my Droid's Power" or whatever the application is called, and see where all the power is going.
khaytsus said:
1 is probably not a good idea, since sometimes Airplane mode sticks.
2 has nothing to do with saving battery, but okay..
3a does nothing if there is no network connection (assuming sanely written programs)
3b is stupid and shouldn't ever be used.
You want to save battery? Turn off wifi when the screen goes off. You can do this automatically with Setting Profile Lite or Tasker, probably some others. I've found that the wifi sleep setting doesn't do anything for me, I can continue to ping the NC for 10+ minutes after the screen goes off so clearly the wifi is still up.
And watch Spare Parts partial wake locks and see if you have any misbehaving apps. I find that Maps with Latitude enabled misbehaves without a network connection and constantly is trying to update or something, so I cleared data on Maps to get out of Latitude on that device. CPUSpy will also show you how much deep sleep is ongoing.
The NC is going to use at least 10%/hr at low backlight doing simple tasks, I've seen it use up to 25% overclocked playing games.
While asleep it uses about 1% every 3-4 hours. Could probably do even better if you don't have a boatload of apps and widgets like I do.
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He said the battery widget is to see if it is asleep, and see what the consumption is like.

Hello,
You are right about battery logging.
i have to test the two applications you mention both:
1. "And watch Spare Parts partial wake locks and see if you have any misbehaving app"
2. "Where's my droid power".

[Q] Wi-Fi Sleep? Pro/Con?

Greetings--long time reader of the forums but n'er a post'r. Hoping to change that obviously.
I'm currently working through what I believe to be a 'bug' in my Cappy, running a custom ROM (Apex) but am debating if it is a lost cause since it's been tough getting the dev to respond to a request.
I prefer my wi-fi to sleep when it's not being used since I rarely ever use 2g/3g data (I physically turn it off when not using it, and may go weeks before switching it back on) as I'm always at home or work, or at a cafe with free wi-fi. I use FB, Twitter, Google Reader, and some minor web usage via browser when at home/at work, so it's not like I'm constantly flipping my phone on to use the services.
I guess my question is: should I just say to heck with my wi-fi sleep bug (it doesn't sleep even though I select the "sleep when screen off" option--it will sleep but only once and the setting will revert to "never" after it wakes back up) and just deal with wi-fi being on all the time? If it's on and stays on throughout the day with very few calls from gmail, none from Twitter/FB since I have all that syncing turned off, does it really chew through that much battery since it's not turning the radio off and on?
There are two settings.db files that I believe are corrupted to some degree on my phone, and instead of piddling with it any more, I'm about to just give up and deal with it--I've goggled and checked to find some hard evidence that allowing it to sleep or allowing it to stay alive is better in some way for battery life. I get about a day and 3/4 of life out of it. A lot better than some folks but I feel I could squeak out another 1/2 day out of it if I had that sleep mode working.

Google Now and Battery Drain

It seems Google Now is draining my battery, not really bad, but it is keep my phone awake.
Now, I guess this is just part and parcel of Google Now having to constantly check your location, but has anybody else have an issue with Google Now on the One?
My battery lasted me 12hours yday with what I consider to be heavy use. Bluetooth Streaming Music for 2hrs web surfing over 3G for 2hrs whilst on the train with varying 3G signal, web surfing over wifi for 1hr (including downloading around 6 - 7mb. 15mins of calls. Around 40 whatsapp messages received and read, about 20 emails received via gmail and read, archived. Couple of minutes video, Switching Screen on just so I can see the phone I say at least four to five times and hour.
Not very scientific, sorry didn't really capture any screen shots with BetterBatteryStat, but gives you a rough idea what the usage was, all of that with Google Now on which I assume is constantly checking my position.
I would like to leave Google Now on, but if its going to make a big difference, then I have no choice but to switch it off. I continue to have location services on, but I assume that just allows apps to use it when required. Is there anything else from Google that requires constant checking of location?

Ok, usual suspects.. switched of location reporting under latitude and the partial awakes for the NetworkLocation seems to have more or less disappeared. Hopefully I get a couple more hours with the sort of use described above. If that's the case, I'm happy with that!
Note, location services under settings is still on.

hongsit said:
It seems Google Now is draining my battery, not really bad, but it is keep my phone awake.
Now, I guess this is just part and parcel of Google Now having to constantly check your location, but has anybody else have an issue with Google Now on the One?
My battery lasted me 12hours yday with what I consider to be heavy use. Bluetooth Streaming Music for 2hrs web surfing over 3G for 2hrs whilst on the train with varying 3G signal, web surfing over wifi for 1hr (including downloading around 6 - 7mb. 15mins of calls. Around 40 whatsapp messages received and read, about 20 emails received via gmail and read, archived. Couple of minutes video, Switching Screen on just so I can see the phone I say at least four to five times and hour.
Not very scientific, sorry didn't really capture any screen shots with BetterBatteryStat, but gives you a rough idea what the usage was, all of that with Google Now on which I assume is constantly checking my position.
I would like to leave Google Now on, but if its going to make a big difference, then I have no choice but to switch it off. I continue to have location services on, but I assume that just allows apps to use it when required. Is there anything else from Google that requires constant checking of location?
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How are you getting that kind of battery life?! Check out my posts in the 'battery life' thead in the 'general' section. 12h is exactly what I'm looking for but I am getting like 9h
Sent from my HTC One using xda premium

yvibes said:
How are you getting that kind of battery life?! Check out my posts in the 'battery life' thead in the 'general' section. 12h is exactly what I'm looking for but I am getting like 9h
Sent from my HTC One using xda premium
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Well, as you know it's all depends on what you run and how you use it. So I can't really answer your question. I can tell you what apps I used though, I unplugged my phone at 7:30am and used Play Movies for a few mins, playing a video, used Gallery for a few mins, check train times using National Rail Enquiries app, used Chrome for browsing on 3G, bluetooth streaming music for 1hr on my commute into work. Used Chrome for browsing and Sky News app on WiFi for say 30mins... downloaded some files over wifi and 3G. 10 - 15 pushed emails, 40 odd whatsapp messages which involved downloading some images, blinkfeed updates probably 3 -4 times, maybe more.
10 - 15mins worth of calls and lots of switch on screen and going through some settings and homescreen navigation and Play Store navigation.
Then browsing over 3G and BT music streaming for another hour on the commute back home.
BT and WiFi was on all day.
I had Google Now on, location settings on, latitude on and the phone was at 2% around 7:30pm when I plugged it back in.
Not very scientific but hopefully you can tell if you use more power hungry apps than I do.
Then recently downloaded BetterBatteryStat and GSamBatteryMonitor and realised that Maps was keep my phone aware for not excessive periods, but throughout the day, I say about 1.5hours. So I looked into exactly what that was and it turned out to be Location Settings in Latitude and potentially google now. Set both of those off and kept location settings on under the main settings, so apps can use it on request.
The phone is now spending less time awake when screen off. There is also a Facebook refresh interval setting, I don't exactly know what that is, but that was set to every 30mins. So I have changed that to every 4hrs. Notifications from Facebook are still pushed I think.
One thing I have set is Blinkfeed to auto te on wifi only and not wifi and mobile data and that was set when I got the phone.
Being a new phone I'm using this more than I would normally, so I'm more than happy with the results. To me, the above is me using it a lot, some people may say that's actually moderate use... so it's all subjective.
Battery life is one those things where you just won't get the same result for everyone, it really depends on so many factors, so you may have done so already and you probably know exactly what you're doing (I haven't read your post unfortunately, meant to be working at the mo) but all I can say, is install those two apps I've mentioned and have a look at partial wake locks and go from there.
Hope that helps.

hongsit said:
Well, as you know it's all depends on what you run and how you use it. So I can't really answer your question. I can tell you what apps I used though, I unplugged my phone at 7:30am and used Play Movies for a few mins, playing a video, used Gallery for a few mins, check train times using National Rail Enquiries app, used Chrome for browsing on 3G, bluetooth streaming music for 1hr on my commute into work. Used Chrome for browsing and Sky News app on WiFi for say 30mins... downloaded some files over wifi and 3G. 10 - 15 pushed emails, 40 odd whatsapp messages which involved downloading some images, blinkfeed updates probably 3 -4 times, maybe more.
10 - 15mins worth of calls and lots of switch on screen and going through some settings and homescreen navigation and Play Store navigation.
Then browsing over 3G and BT music streaming for another hour on the commute back home.
BT and WiFi was on all day.
I had Google Now on, location settings on, latitude on and the phone was at 2% around 7:30pm when I plugged it back in.
Not very scientific but hopefully you can tell if you use more power hungry apps than I do.
Then recently downloaded BetterBatteryStat and GSamBatteryMonitor and realised that Maps was keep my phone aware for not excessive periods, but throughout the day, I say about 1.5hours. So I looked into exactly what that was and it turned out to be Location Settings in Latitude and potentially google now. Set both of those off and kept location settings on under the main settings, so apps can use it on request.
The phone is now spending less time awake when screen off. There is also a Facebook refresh interval setting, I don't exactly know what that is, but that was set to every 30mins. So I have changed that to every 4hrs. Notifications from Facebook are still pushed I think.
One thing I have set is Blinkfeed to auto te on wifi only and not wifi and mobile data and that was set when I got the phone.
Being a new phone I'm using this more than I would normally, so I'm more than happy with the results. To me, the above is me using it a lot, some people may say that's actually moderate use... so it's all subjective.
Battery life is one those things where you just won't get the same result for everyone, it really depends on so many factors, so you may have done so already and you probably know exactly what you're doing (I haven't read your post unfortunately, meant to be working at the mo) but all I can say, is install those two apps I've mentioned and have a look at partial wake locks and go from there.
Hope that helps.
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Thanks so much for this will see my wake locks now. So where exactly do I go to turn of the location thing in maps??
Sent from my HTC One using xda premium

You can turn off use WiFi and cellular to help reduce the wakelocks or disable Google now. I never use now and it was always a horrible battery drain for me.
Sent from my HTC One using xda app-developers app

yvibes said:
Thanks so much for this will see my wake locks now. So where exactly do I go to turn of the location thing in maps??
Sent from my HTC One using xda premium
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Do you have the App Google Settings. It came with the phone and it has a green icon. Go in there and under Maps & Latitude you'll see a load of settings.
1) Switch off Location reporting, I used "Do not update your location", however, I think you can use "Set your location".
2) I've unchecked Report from this Device.
3) Enable Location Sharing was unchecked for me by default.
4) Disable location history
5) Disable Automatic Check Ins
I also have google+ off.
Now, obviously if you like to use that stuff, then you have no choice, but I don't need to keep track of where Ive been and I don't need constant reminders about things around me and how long it takes to get home on public transport (which only includes buses btw). If I did need local information, there is plenty of other apps that does that at my request.
If they refined it and made it much more configurable then it might be good, e.g. include trains and actually let me configure when the times I want it to start checking, e.g. when I finish work, an hour before start looking at weather, train times home, any delays and whats on TV.. now that would be brilliant, one it will save power as it will only check location at specific times and two it's actually useful information at that particular time.
Thats me though. Others might need Google Now as it is..
Hope that helps.

hongsit said:
Do you have the App Google Settings. It came with the phone and it has a green icon. Go in there and under Maps & Latitude you'll see a load of settings.
1) Switch off Location reporting, I used "Do not update your location", however, I think you can use "Set your location".
2) I've unchecked Report from this Device.
3) Enable Location Sharing was unchecked for me by default.
4) Disable location history
5) Disable Automatic Check Ins
I also have google+ off.
Now, obviously if you like to use that stuff, then you have no choice, but I don't need to keep track of where Ive been and I don't need constant reminders about things around me and how long it takes to get home on public transport (which only includes buses btw). If I did need local information, there is plenty of other apps that does that at my request.
If they refined it and made it much more configurable then it might be good, e.g. include trains and actually let me configure when the times I want it to start checking, e.g. when I finish work, an hour before start looking at weather, train times home, any delays and whats on TV.. now that would be brilliant, one it will save power as it will only check location at specific times and two it's actually useful information at that particular time.
Thats me though. Others might need Google Now as it is..
Hope that helps.
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Here is my better battery stats screenshot. Anything I need to know?
Sent from my HTC One using xda premium

yvibes said:
Here is my better battery stats screenshot. Anything I need to know?
Sent from my HTC One using xda premium
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I'm no expert, but that seems OK to me.

Google Now was an even bigger drain on my S3 ...I had to disable it on that phone. I was struggling to get past 6 hours! I deactivated all the Google Now cards and the battery life returned. The One is clearly better because even with those same cards enabled, I can easily get through the day and beyond. Google Now is clever, but power hungry.

hongsit said:
I'm no expert, but that seems OK to me.
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Next thing to look at is the App Sucker in GSamBattery Monitor and set it View Time Held Awake. My top three are Kernal (Android OS) 38m 1s, Google Services 13m 37s and System (*wakelock*) at 10m 9s.
You can find a lot of info in there and you can drill down even further and usually can tell what exactly is it that's draining the batt. Kernal and System, I don't know enough about, but when there's specific Apps that show high battery consumption you can tell straight away.
E.g. yday, I started up Sky Go even though I knew it wasn't working and shut it down immediately. However, it continued to run in the background and could only tell by looking at the BetterBatteryStats and GSamBattery Monitor.

hongsit said:
Next thing to look at is the App Sucker in GSamBattery Monitor and set it View Time Held Awake. My top three are Kernal (Android OS) 38m 1s, Google Services 13m 37s and System (*wakelock*) at 10m 9s.
You can find a lot of info in there and you can drill down even further and usually can tell what exactly is it that's draining the batt. Kernal and System, I don't know enough about, but when there's specific Apps that show high battery consumption you can tell straight away.
E.g. yday, I started up Sky Go even though I knew it wasn't working and shut it down immediately. However, it continued to run in the background and could only tell by looking at the BetterBatteryStats and GSamBattery Monitor.
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Sent from my HTC One using xda premium

yvibes said:
Sent from my HTC One using xda premium
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Concentrate on the top 2 mate, seems like Maps and MediaServer what ever that is keep your phone awake for over 30mins. I would set a custom ref and switch screen off and check again say 10mins.
I've also discovered something else in Kernel Wakelock. Im on wifi at home and after 5 mins of screen off, it nearly has 1min of MSM_HSIC_HOST wakelock. I think this is the modem and wonder why it needs to wakeup as all data is going via wifi. Since unplugged this is at 1hr 17mins, with only roughly 1hr away from home. Does anybody know if this sounds right?
It is something else to look into

Any APP to prevent deep sleep?

Hi!
Having troubles with a 520 because once it enters the deep sleep state, it'll start getting Whatsapp notifications only when waking it up.
No battery saving setting is turned on.
An APP that wakes the device from time to time would help.
Thanks.

Perhaps you either have cellular data turned off, have no data signal, or are set to only receive notifications over WiFi? By default, WP turns off WiFi when the screen is off and the phone isn't plugged in. I think there might be an option to change that, but I don't recall where it would be.
There are definitely apps that will cause WiFi to stay on in the background (I think pretty much any streaming music app does this?), but those will wreck the battery life if you just leave them on all day. Apps are also able to periodically (~every 30 minutes) do some stuff in the background even in the phone is sleeping, but I'm not sure if this is allowed to wake up the WiFi and cause it to connect.
If the problem isn't WiFi instead of cellular data, I really don't know what's going on.

Thanks! Read here if you're still interested:
http://discussions.nokia.com/t5/Lumia/Lumia-520-vs-Whatsapp-delays-delays-delays/td-p/2931533