yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy W I8150] LeroViten:
No, this kernel is only for CM10.1 as the name of the thread goes. :)

In case you require a new kernel for cm10.2 - this is not allowed! Don't hurry up the dev. :)
[Samsung Galaxy W I8150] hadidjapri:
AFAIK, the kernel itself doesn't need mounting because you are flashing it like you flash recovery via adb shell(dd command). but mount is needed for additional files such as module files in folder "system" or other files added by the dev

kindly correct me if i'm wrong :)

Sent from my GT-I8150
[Samsung Galaxy W I8150] Keff91:
OP updated with CWM 6.0.4.5 ;)

You can download from HERE also.

Unzip it and install via terminal emulator. Thanks.
[Samsung Galaxy W I8150] upilguebu:
should I install it via teminal or can i use ODIN or UKF ( Universal Kernel Flash )? Last question, is that CWM is stock kernel but with CWM recovery? Well this is my first time playing with kernel in Galaxy Wonder (ancora), I'm from galaxy ace 2 (codina) forum :D Thanks in advance:good:
[Samsung Galaxy W I8150] LeroViten:
Here things go a bit different way. If your wonder is still on stock you will need .tar recovery file for flashing via Odin.

If you already run CWM, but you want to update it - then you can download this file and flash the recovery.img file (inside zip) via terminal emulator. But to make things even more easier for updating CWM, I made a flashable archive.

[URL="http://www.mediafire.com/?xy233aamm7niwg7]Download from my MediaFire[/URL]

Simply flash it via your existing CWM recovery as you ordinary flash a ROM, but without wipes. After that, reboot recovery from Advanced section. ;)

Credits: [MENTION=4465010]Keff91[/MENTION]
[Samsung Galaxy W I8150] tycoo:
I have a Déjà-vu..:laugh: Big thx again! :good:
[Samsung Galaxy W I8150] Keff91:
Here's the CWM 6.0.4.5 for flashing via Odin. It's useful for those unroot phone.

Unzip first, then open Odin and select the ops file, and enable one package in options, then load the md5 file with the One Package button.

You can grab it from HERE

Please help me test :)
[Samsung Galaxy W I8150] LeroViten:
Yes, you can update by simply flashing my zip via recovery without wipes. :)

To see the result - reboot recovery from Advanced section.
[Samsung Galaxy W I8150] scorpion26:
I flash your cwm 6.0.4.5 than i flash kernel my phone. I tested most feature, everything is OK!
[Samsung Galaxy W I8150] Keff91:
First post updated with new CWM 6.0.4.5 again.

Mainly because it added 4.4 compatibility. ;)
[Samsung Galaxy W I8150] LeroViten:
And... Here's your recently updated CWM recovery in a flashable zip.

Click to DL from my MediaFire
[Samsung Galaxy W I8150] Keff91:
Thank you. OP updated with your CWM flashable zip also.
[Samsung Galaxy W I8150] abeeennng:
sorry sir Keff and leroviten

i have a question about new cwm 3.0.45

why i flashing rom,with your cwm, its always aborted

first, i think my rom is corupted, but when i back to my previous cwm, its finished

its have to add another file on my updater-script or something else?

thanks :)

---------- Post added at 08:08 AM ---------- Previous post was at 08:07 AM ----------

sorry sir Keff and leroviten

i have a question about new cwm 3.0.45

why i flashing rom,with your cwm, its always aborted

first, i think my rom is corupted, but when i back to my previous cwm, its finished

its have to add another file on my updater-script or something else?

thanks :)
[Samsung Galaxy W I8150] LeroViten:
Weird thing... I've tried all the operations and it is working fine so far. :)
[Samsung Galaxy W I8150] abeeennng:
ok thanks for the answer :)
[Samsung Galaxy W I8150] zinednaklab:
+1 Same issue here
[Samsung Galaxy W I8150] hadidjapri:
hi keff did u build it from 4.4 source?

just to make sure :)
[Samsung Galaxy W I8150] Keff91:
What rom you flashing?

yeah, I build from cm11.0 branch. Maybe problem there.. :(
[Samsung Galaxy W I8150] abeeennng:
Cm9 until cm10.1 sir

Sent From my Esia Hidayah
[Samsung Galaxy W I8150] Keff91:
Ok, I will try to fix it. For now you can try my previous CWM 6.0.4.5 recovery.

It still the same but only not compatible with KitKat yet.

Download
[Samsung Galaxy W I8150] abeeennng:
ok sir, thanks
[Samsung Galaxy W I8150] Keff91:
Anouncement

Skull kernel for CM10.1 (V2.0) released!

Update CWM recovery also!

Check first post for more details :laugh:
[Samsung Galaxy W I8150] tycoo:
Finally! I was waiting for version 2 (since i saw the beta in your sig) ;) and successfully installed it at once.

Thx a lot again Keff! :good:

I switched the display a few times on and off and didnt mention the whitescreen bug yet! I have a look the next days too.

Performance is imo awesome too. Just played Real Racing 3 without lags, closing the app and returning to desktop, the launcher (nova prime) + several widgets are fully available again very fast.

So, as far as i can see, excellent work again Keff! I'm amazed. :cool:
[Samsung Galaxy W I8150] dec0der:
Thanks a lot mate. Seems that this is the only cm10.1 3.4.x kernel that is being updated. :good:
[Samsung Galaxy W I8150] Keff91:
I'm sure that whitescreen bug is fixed as I'm reverting to use back arco whitescreen fix in this new build.

(without the use of framebuffer)

The only doubt I worried now is constant battery drain on sleep. I was trying to fix that on this build and I seem getting good result too.

How about yours?

coz I still using cm10.1 now. :)
[Samsung Galaxy W I8150] dec0der:
What kernel version did arco added his own whitescreen fix? is there anyway you can provide me a 3.4.73 stock kernel? thnx

Well, that's is the good thing, considering that all eyes are on 4.4 right now.
[Samsung Galaxy W I8150] Keff91:
https://github.com/arco/samsung-kernel-msm7x30/commit/ebb5b6f1672c15f2e592cd49b7059f6fdbdca83a

For the stock kernel, I remember [MENTION=4022876]arsradu[/MENTION] has made a thread for it.
[Samsung Galaxy W I8150] herioeks:
I'm also using CM10.1 till now, ported from ADCT S+ CM10.1 EOL with [MENTION=4465010]Keff91[/MENTION] 's Skull Kernel :victory:
[Samsung Galaxy W I8150] Keff91:
sir arco still maintaining it. I got saw his update on CM10.1 branch. :thumbup:

Maybe need to wait longer for his release since he more focus on the development on Galaxy S4 mini.
[Samsung Galaxy W I8150] herioeks:
Nice to hear that. I'm still waiting for CM10.1 to reach it's final stage :) Thanks for the info :victory:
[Samsung Galaxy W I8150] tycoo:
I got a battery drain maybe around max 0,5% an hour in deep sleep last night. I guess thats not bad? Perhaps before it was a little bit better.

But i will keep watching it next hours & night and report tomorrow again.
[Samsung Galaxy W I8150] dec0der:
Torch won't activate when i tap the icon on quick settings panel.
[Samsung Galaxy W I8150] kacanghantu:
no problem on my phone..
[Samsung Galaxy W I8150] dec0der:
That's wierd. If i change back to stock kernel it's working fine :eek:
[Samsung Galaxy W I8150] Keff91:
Yeah, that really weird. Torch on my phone is working.

Properly you need to wipe cache or even re-install rom. Check it out bro.
[Samsung Galaxy W I8150] dec0der:
Yeah :) Anyway, its okay. I'll just activate it from the apps directly. Thanks.
[Samsung Galaxy W I8150] Keff91:
Remove it from quick setting panel and add it again does help?
[Samsung Galaxy W I8150] tycoo:
It is working fine here too.

----

Hi Keff, in the attachment you can see my battery drain and deep sleep state from last night.

I have to mention that i am using a fresh new 1800mAh battery since two weeks now, because my original old one became bloated. Wifi, gps, & mobile data is always off unless i need it.

Looks good, doesnt it? I just dont know whats going on with the long blue active line..

Any other information i can provide to you?
[Samsung Galaxy W I8150] dec0der:
Yep, i tried it but still no luck. Don't worry, it's just fine. Since most of them here are working fine (torch) i just might messd up with something :D

---------- Post added at 05:08 PM ---------- Previous post was at 05:05 PM ----------

Blue line below Deep Sleep w/ 97%? Well, that's the indication/ range your phone being in deep sleep for a period of time and it shows very well.

Here's mine:
[Samsung Galaxy W I8150] Keff91:
I feel really satisfied for the result. Thank you. :)

About the long awake line, properly is caused by app that might awake your phone in sleep.

Mine just work fine.
[Samsung Galaxy W I8150] dec0der:
I've notice that too. There's a lot of wake-ups on his device, mine is doin pretty well too. [MENTION=5425708]tycoo[/MENTION] i suggest you greenify those apps including system apps that you're not using (it will save battery), you can use wakelock detector too to determine which apps causing it.
[Samsung Galaxy W I8150] tycoo:
Aye, i already used wakelock detector (see the attached pictures above) & greenified some apps.

Thats why i was wondering because the blue line is long enough for at last more than 2 hours of activity, although wakelock detector only shows an amount of 1%, with a total awake time of 12.58 min in 8 hours 50 min. The battery drain is appropriate low too.

Thats a bit curios :confused:
[Samsung Galaxy W I8150] gmenelau:
Great karnel i thing is it the best karnel in here sorry boys and girls is the truth !!

now for little feedback :

i am update the karnel few 3-4 days ago from the 1.9 and the battery is drain faster ! i am using the same ways like before ! also i notice when the the wifi is on the bettery is drain very fast like 10% in 2-3 min . I am using the monster rom 15

great job thanks !!
[Samsung Galaxy W I8150] Keff91:
CWM 6.0.4.6 released.
[Samsung Galaxy W I8150] Trojan.Flame.A:
this kernel is so awesome! do you have any plan to sync it to arco latest source kernel 3.4.75? or make it ION + PMEM maybe? btw thank you for your awesome kernel :highfive:
[Samsung Galaxy W I8150] aqirul2411:
BLN???

does this kernel support BLN???
[Samsung Galaxy W I8150] Xhemal1325:
This kernel was amazing, but doesnt work anymore on CM 10.1 Beta 4, :(, why not countinueing this project ? :( ?
[Samsung Galaxy W I8150] ianfebriyanto:
what governor that you using ? I'm using hyper , I/O row, when I play music using walkman it fracture when song playing, but just little bit.
[Samsung Galaxy W I8150] TiTAN-O-One:
Not what? :p I tried Subway Surfers oso with PMR and Seeder apk... First 2 games laggy like what... After that, run really smooth... ! :D LulzactiveW and row
[Samsung Galaxy W I8150] dollyaja:
Yup,they were disscuss about it on alpha4 disccusion thread.

Anyway,I don't bother for thetering, never use it often.LOL

Really? How come if in the base kernel wont works

Same like [MENTION=5014330]TiTAN-O-One[/MENTION] LuzlactiveW+row just different tweaks

Highfive (˛•̃•̃)/\(•̃•̃¸):D

sent from my Xperia J and Galaxy W with customized ICS
[Samsung Galaxy W I8150] MiguelPT:
It works for me, i use my phone a lot to get internet connection on my laptop, when the screen goes off i can't load web pages, but if i start streaming something before the screen goes off the content just keeps streaming, however i still can not load web pages, i have to set my phone to never turn off the screen when charging.
[Samsung Galaxy W I8150] mps42:
So bluetooth bug is solved ?!! :)) now i can flash 4.2.2 rom and flash your kernal and enjoy :)) thaaanks
[Samsung Galaxy W I8150] Keff91:
Yeah, bluetooth working fine here but it's just a hack fix by me (might unstable). I still need "official" fix from arco.

About spirit fm, arco solve it on his last commit so credit goto him also ;)
[Samsung Galaxy W I8150] Madridii:
Sir

About bluetooth, Is there any problem with deep sleep while it is on ?!

I tried your fix, It is working good .. Thank you
[Samsung Galaxy W I8150] Keff91:
while turning on bluetooth, deep sleep not working, arco also told me might have wakelock problems if apply my fix. (I actually not sure what is that, any bad effect or not)

and you need to turn off bluetooth to let phone go in deep sleep properly.
[Samsung Galaxy W I8150] TiTAN-O-One:
Hii! Funny, in terms of gaming and such, this kernel is better but it has 352 RAM than hurtsky's 370 RAM... How??? :sly::eek::rolleyes:
[Samsung Galaxy W I8150] rkdss:
Thanks for the great work. :):):):)

I'll be doing some testing this new kernel.
[Samsung Galaxy W I8150] ianfebriyanto:
hello [MENTION=4465010]Woohooo...[/MENTION] , I don't know why when I play music, it is not play well, there a delay, but just little bit, and specially when start to open some apps. I'm using walkman music player, and apolo too, I tried using lulzactive, hyper, ondemand, all same, but hyper is more bad. I just report that happen to me, but I love this kernel and your job :D, sorry my bad english
[Samsung Galaxy W I8150] Keff91:
I will look into it but not now. (I don't have my phone these few days :()
[Samsung Galaxy W I8150] ianfebriyanto:
Haha, relax bro, I will wait :D
[Samsung Galaxy W I8150] dollyaja:
I think the walkman mod that cause the issue,it happen also with my friends phone with CM9 RC8 + hurtsky kernel , my opinion that the walkman mod doesn't compatible with arcos latest build CM

sent from my Xperia J and Galaxy W with customized ICS
[Samsung Galaxy W I8150] zayustman:
It because rom bugs, it happend since alpha 4,

I use poweramp and i set audio buffer tweaks to large +250ms and now audio didn't lag or delay anymore,

Try to find this setting on walkman, i dont use it, but maybe it works too..:p
[Samsung Galaxy W I8150] ianfebriyanto:
haha, I don't know, I will try later, but I'm using hutrsky kernel v1.0 for JB 4.2.2, the delay is more little. it's just my opinion, you can try by yourself :D

haha, thanks for your opinion, but when I using apolo was same result.
[Samsung Galaxy W I8150] Hyst:
Hey,

your work looks pretty good. But I have a question about the "temp bluetooth fix". What exactly do you mean by that? I understand that you hacked something so that bluetooth works now. Can you explain, what you did? Or why your fix might not be stable (as you stated few posts back)?

You yourself called it a "hack", so I wonder what makes it a hack rather than a fix. And did you tell arco about it, so that he might include it in his work?
[Samsung Galaxy W I8150] Keff91:
Well, let make this topic short and clearly. :)

The bluetooth file transfer problem mainly is cause by bluedroid implementation (new design of bluetooth in latest android). However it might set something wrong on our kernel so it has some issue. What I did is remove bluedroid completely and sync with old bluetooth (driver) and yeah bluetooth working great again.

That's why I called it as hack or temp fix since I'm not fix the bluedroid yet, right?

and arco already knew this stuff and he's the one told me this fix might unstable. But I will continue to use this fix until arco found a better way to solve it. :good:

As a reference, you can view my commit:

HERE
[Samsung Galaxy W I8150] Hyst:
nice, thank you for your answer. :good:
[Samsung Galaxy W I8150] kakung:
[MENTION=4728498]ianfebriyanto[/MENTION]

ofcourse it has the same result wether you use apollo or walkman music player.. the problems weren't come from the player, but the patch (walkman for galaxy W) you've flashed. if you open the flashable zip file, you can see some stuff in lib for audio, (i believe) those things are what makes the lag/issues happened. (:
[Samsung Galaxy W I8150] TiTAN-O-One:
Gaming ;)

I tried this kernel and this one is better than HurtSky's in gaming perfomance, but this has 352 RAM compared to 370 RAM so how is gaming better in this one ??? :confused::silly:

Games tested: GTA3, Subway Surfers, CSR Racing :D
[Samsung Galaxy W I8150] dollyaja:
Agree with you bro,this one still better than hurtsky for gaming(test with all governors and yes,luzlactiveW is very good ),for the ram..its just numbers :p ,why bother as long it suits your needs :D

sent from my Xperia J and Galaxy W with customized ICS
[Samsung Galaxy W I8150] Keff91:
Skull Kernel v1.1 (JB 4.2.2) released.

Enjoy :o
[Samsung Galaxy W I8150] Madridii:
nice work !

Thanks
[Samsung Galaxy W I8150] TiTAN-O-One:
I wish i could test this but EXAMS are just around the corner :mad::(
[Samsung Galaxy W I8150] dollyaja:
Cheer up bro,finish your exam and maybe you can make your own Titans kernel hahaha, good luck anyway for d exams and this kernel still awaits before next update ( i hope so :D )

sent from my Xperia J and Galaxy W with customized ICS
[Samsung Galaxy W I8150] joaocadide:
Did anyone noticed that music "jumps" every time when you're listening to a song? I've tried Google Play Music, Apollo, activate and deactivated Equalizer and songs keep being interrupted by a silence.
[Samsung Galaxy W I8150] kakung:
anyway, what or how many volt that would be better/best if i want to undervolt with incredikernel?

sorry for noob question d:
[Samsung Galaxy W I8150] dollyaja:
UV

Try to lower 5+/10+ each untill reboots or switch off,if that happens raise with same points again till its stable. Thats what im doing,sorry cant post my screenshot yet since im running on CM10 RC 1 now :)
[Samsung Galaxy W I8150] kakung:
what do you mean "if thats happens"? what is "that"?

and if i'm not wrong (in the incredikernel), the value of increasing or decreasing the voltage is 25 points (e.g "1025", i decrease it one time and become "1000") so do you mean that you've lowered it 5+/10+ volt or 5+/10+ times? (5+/10+ × 25volt)

hehe, just want to make it clearer, so everyone that (maybe) also don't understand won't doing something wrong. d: hehe
[Samsung Galaxy W I8150] dollyaja:
if your phone doesnt stands for extreme undervolting,it happens (random reboots/power off by itself) im using incredicontrol for undervolting,its free on Playstore
[Samsung Galaxy W I8150] irfanharith:
Thanks !
[Samsung Galaxy W I8150] Keff91:
Nope. I can listen a song to the end without any problem.

Thanks for your detailed explanation.
[Samsung Galaxy W I8150] TiTAN-O-One:
One question to Keff... The new I/O schedule seems to make my phone laggier... What is the purpose of it? :rolleyes:
[Samsung Galaxy W I8150] Keff91:
fiops is just an extra I/O schedule that added to kernel. Try to use ROW or SIO, it should less lag.
[Samsung Galaxy W I8150] TiTAN-O-One:
But whyy? :confused: And ya, The rest didn't lag! :)
[Samsung Galaxy W I8150] Ahmed.ragab:
How is battery life ?
[Samsung Galaxy W I8150] sagaracipta:
Thanks a lot bro.. God job :thumbup::beer::beer:
[Samsung Galaxy W I8150] nisiomorais:
Can I use this kernel with the last version of Cyanogen? (Alpha 5)
[Samsung Galaxy W I8150] dollyaja:
I think you can add this kernel since arcos alpha5 comes with 3.4.44 , and this kernel build from arcos github right before arco release this alpha5 with same kernel #CMIIW

sent from my Xperia J and Galaxy W with customized ICS
[Samsung Galaxy W I8150] Keff91:
Sorry but I must to say this kernel is a bit out-dated. Arco had make various wifi changes and that's why wifi improved alot.

I will keep update this kernel and release it when it's stable.
[Samsung Galaxy W I8150] Dr. Hurt:
[MENTION=4465010]Woohooo...[/MENTION]:

Thank you very much for the kernel. May I suggest a few things though.

Setting default scheduler to SIO or NOOP as it provides the highest random read IOPs and therefore least lag and setting the default governor to interactive for best balance between speed and battery life..

UV for the display panel, WiFi, and SD-card for better battery life.

Thanks and looking forward to the next release :)
[Samsung Galaxy W I8150] kakung:
my wifi cant even turned on. its always stuck on "turning on" and it makes my wonder couldnt have a time for sleep. anyone? anyhow?

i'm using v1.1 on a cm10.1 a5 and undervolted it on every category. help. l:
[Samsung Galaxy W I8150] joaocadide:
WiFi thethering doesn't work.

I wish someone could update this kernel. It is the best for me but I really need WiFi thethering.
[Samsung Galaxy W I8150] Keff91:
Skull Kernel v1.2 released.

Not much improvement on this time, but included some fixes also ;)

Keff.
[Samsung Galaxy W I8150] sagaracipta:
First :p:p thanks

Sent from my GT-I8150 Just CM10 & CM10.1
[Samsung Galaxy W I8150] :
This kernel never works for me, and apparently never will. I don't know what you do to it, but it always crashes as soon as it boots Android. I'd say compability of this kernel is VERY low. Not good at all.
[Samsung Galaxy W I8150] hotheabilly:
maybe just your phones. I'm using since for CM10 time and now on CM10.1 still work great for me
[Samsung Galaxy W I8150] Keff91:
Are you sure you install this using the right way or to the right rom ? I tried flash it many time, not having any issue you mentioned on it.

hmm.. i wonder :(
[Samsung Galaxy W I8150] kabychow:
work fine here too~

do appreciate others people work :)
[Samsung Galaxy W I8150] hotheabilly:
the latest v1.2 working fine tho. thanks :)
[Samsung Galaxy W I8150] coliv_aja:
Latest version also working great for me. :D
[Samsung Galaxy W I8150] cavedano8:
working great!!

good good kernel! :good:

thanks!! :laugh:
[Samsung Galaxy W I8150] Keff91:
Nope. This kernel only for custom jellybean rom (JB 4.2.2).

One of these rom is CyanogenMod 10.1 (aka cm10.1).

http://xdaforums.com/showthread.php?t=2214042
[Samsung Galaxy W I8150] feizhel_vandrago:
waiting for 3.4.47 kernel for cm10.1 alpha 6.. :D
[Samsung Galaxy W I8150] Keff91:
Will release when it get ready. I just get softbrick a minute ago when I tried to use my own cmw build :eek:

Luckily I have Odin on my laptop, that fix it.

Odin is my bestfriend, as always.
[Samsung Galaxy W I8150] readz_one:
does this kernel auto roots my phone ? my phone is now on pacman rom but i don't know how to root galaxy w with jellybean. hopefull finding a kernel that have auto root will fix this
[Samsung Galaxy W I8150] feizhel_vandrago:
it's true :)

keep spirit bro :)
[Samsung Galaxy W I8150] klacenas:
cyanogen roms have root access enabled by default.
[Samsung Galaxy W I8150] Keff91:
Skull Kernel V1.3 released.

Alot of changes introduced this time especially on ramdisk part.

Enjoy :)
[Samsung Galaxy W I8150] dollyaja:
Whats good for daily and whats for gaming? Row+..../sio+.... :D
[Samsung Galaxy W I8150] Madridii:
Great job :good:

If I downloaded your kernel and extract it, Can I use the Ramdisk of it? what is the diff. between it and one from stock kernel from arco?!

Thank you so much
[Samsung Galaxy W I8150] Keff91:
Both result almost the same, use either one of them is fine through.

and I'm using row NOW, it's quite stable. :)

You can use it. I added busybox binary and scripts into the ramdisk as well whereas arco not.

You are welcome.
[Samsung Galaxy W I8150] Dr. Hurt:
Could you please add lagfree governor to the kernel.

Thanks in advance.
[Samsung Galaxy W I8150] Keff91:
Skull Kernel v1.4 released.

Check first post for more details.
[Samsung Galaxy W I8150] :
sir can you use 371 RAM like madridii kernel? :D
[Samsung Galaxy W I8150] Keff91:
Can, but I need more testing of these. Stay tuned :)
[Samsung Galaxy W I8150] gwonder:
I have a bug when I set to CPU 1.8 phone not response and froozing when CPU using cpu with 100% and if I back to 1.4 then going phone normal pls fix this problem and sorry for my bad English
[Samsung Galaxy W I8150] Keff91:
Oh this critical bug!! Thanks for your reporting.

It's already present in few previous build, that's my false and careless. I will tried fix it asap. :(
[Samsung Galaxy W I8150] gwonder:
No problem good luck for fixing i will wait ur new update take u care
[Samsung Galaxy W I8150] scorpion26:
You are perfect man :) thx for this kernel. Veeeerry fast
[Samsung Galaxy W I8150] hotheabilly:
:eek: :eek: how to change the username?? I wondering this. Sorry if offtopics but really want to know :D

-Sent from CM10.1 i8150-
[Samsung Galaxy W I8150] Keff91:
Okay, few step actually. First go to this page, then fill out your request and information.

After finish just click sent and wait for reply in your email. Probably need 1-2 days. :)

Remember to choose a name that not being used by other, if not your request will be rejected.
[Samsung Galaxy W I8150] ghost141:
I use this kernel.. and hang 3 times... 1 at instagram... 2 at big time gangsta and 3 at dark avenger... :/ what's the reason... back to hurtsky for now...

i love ur kernel because it reduce the battery consumption while using wifi. but, have to wait for new release....