yashsingh1/xdaforums huggingface dataset:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] AyieStyx:
So you are saying that unlocking 4G in Dual Sim K910 is possible because it has the same chipset?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
Yes, it can be unlocked like other devices, software is to blame for the lack of lte
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] AyieStyx:
So is there any link or someone who actually unlock the 4g by any chance?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
Yes, its a procedure to unlock lte on sony devices with qualcomm chips , u can find on xda, the guys there say ita working on any device but i did not tried it
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] AyieStyx:
If you have the link that help a lot cuz my net connection is quite bad right now.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
Do you tried? Anyone tried this? I tried but i stuck in the 3rd step (*#*#8778#*#*) and nothing happen. How can i open the Diag Mode (Diagnostic Mode) ?

Link: http://xdaforums.com/crossdevice-dev/sony/thread-progress-please-leave-im-updating-t2871269

I put this code: ####46361111# and i see this:

I think it is possible unlock the 4G LTE.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
It is for sure possible but we need the kernel source first, i don't know if lenovo will give that for the k910 dual sim
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
But is the kernel of the K910L but incomplete, I think.

Link: http://support.lenovo.com/rs/sr/products/phones/vibe-series/vibe-z/downloads/DS00331
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
I lost root when i install the last VibeUI Version: VIBEUI_V2.0_1443_7.67.1_ST_K910

I try this, but i can't enter to bootloader. Just show "Lenovo" logo and stay there.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
I used the "simple TWRP installer" program just which bricked my K910.

To fix it, I get it to appear in QPST Configuration and eMMC downloader and it says "Phone in download mode on COM18" but then the phone restarts and the programs displays "No Phone" and so it switches between no phone and "phone in download mode" over and over.

At one time it stayed on "phone in download mode" in eMMC downloader but flashing bootloader timed out anway.

Any ideas on how to get this to work? I tried it on three different computers, same result.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
diffferent kind of stuck

hello,

im back into the topic :

some guys already knows that i had stucked in lenovo logo , 9006 etc and i saved my phone by miflash 4-5 months ago, and so far everything was good.

last week i OTA updated 1443 last ST version ,, and everything was nice.

This morning i restarted the phone only, no ROM flash or smthg just restarted the phone!

and its now STUCKED at NOT simplefirst lenovo screen, its passing first lenovo screen, and then Powered by ANdroid screen passsing, and then LAst screen: lenovo FOR THOSE WHO DO coming and it stuck there.. i discconnected the battery even but the same.

very instersting, first time i see smthg like that in the forums. whats it about? and what to do?

---------- Post added at 11:57 AM ---------- Previous post was at 11:55 AM ----------

hi man,

iknow you from old pages, so wanted to ask you about my this issue also :/
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
i'm sorry, i don not own a K910 anymore to try and reproduce your error, try again with miflash, i don't know how to help you
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
its fixed by itsself.. dunno what was that....

why u dont have k910 anymore?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
tomorrow my k920 will arrive :)
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] kojicris:
MMS codes issues

Hi,

when I try to obtain credit infos about prepaid card with codes like *100#, *123*1#, etc... I get nothing but strange characters in return, did anyone have same issues as mine?

I'm from Romania, Digi and Telekom SIM cards and the phone is Vibe Z K910 3G Dual-SIM, of course...

Can this be solved somehow?I use VIBEUI_V2.0_1443_7.67.1_ST_K910_baralajbi_V9 ROM.

Thanks for your answers.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
When i opened the Theme Center, then crash... I don't know Why :(

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Crowds:
Witch ROM you're using?

If it's a build one check if you have a ".lenovotheme" folder on system\etc folder inside ROM.zip used to install
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
The original from Lenovo

I used your *.zip mirror to download.

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] AyieStyx:
Checking balance using USSD on sim 2 doesnt show any text. Anyone?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] AyieStyx:
I managed to edit the official latest ROM to remove the bloatware. Its work like charm, but now I want to make the ROM is deodexed, anyone who have experience with deodexing k910 ROMs?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
CALL LOG cant see CONTACTS :eek:

hi,

in my CALL LOG- the phone numbers can not be seen by contact list names anymore!

there , only the numbers exist.

but when i check the contact list, everything works perfect.

but why CALL LOG cant see these contacts? it suddenly happned without any reason :/
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
you like the flagships! ;)
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
Yeah, but not samsung...:)

Sent from my Lenovo K920
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
Headshot!

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ask5868:
i would like to uninstall some bydefault apps that i found in lenovo k910 vibe z.i have to root it,right?how difficult is is for a noob nat whats the process?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
its up to the noob, if he wants to mostly search&learn instead ask&learn ( lazyone)

:)

rootgenius
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
re- root?

hi guys,

i had Rooted last version of offcial rom, and then i OTA updated to newest offical rom and root gone?!

now i want to root again but how,

rootgenius couldnt do it. i wont want to install new system or smthg..
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ask5868:
the same problem.using root genius it stopped at 77% of process.so close.. then there was a question to root manually.instead i tried to restart via root genius with no result.what should i do?

i ve bought it by minideal so i have a couple of chinese apps and motos while booting.so as to have only english i have to flash the rom?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Saiyajin:
Lollipop?

Has anyone heard anything from Lenovo about updating existing devices to Android 5.0 aka Lollipop? Since there is so much happening on the KitKat ROM I was wondering if they will port Lollipop to the Vibe Z
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
puff again something..

its interesting,

That i wanted OTA update much, not to reset everything in the phone while flashing new rom..

OTA is best. to get all updates, CAmera updates etc.. without any re-adjsuting apps, lay outs etc..

so,

JUST becuase of it , i stopped using custom ROMS, i accepted chinesee APPS and started to use Official ROM! just for OTA.

But now i see that , after OTA update, i lost MY Root .

SO, is there any fff&%+$ solution for that?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
I think you have to do a downgrade to 4.2.2 with *.qsb file.

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
thats the point man, i do not want to loose all m applciations, layout of them on desktop, all my adjustments..

i simply want to update only by OTA without loosing Root. :confused:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Crowds:
Each time you install an OTA or any other unrooted rom using my TWRP, when you choose reboot after installation, TWRP sees if you've lost root and give you the option to reinstall it.

Sent from Lenovo K910 through Tapatalk
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
thanks for the answer,

i have already bricked phone once and saved it after 1 month ))

so,

which TWRP you advice? there are several once in your signature, i have now last official VIBEUI_1447 _ ST

can i directly use ur first option?

Install TWRP Easy & Clean - Simple but effective way to install TWRP with just one click
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Saiyajin:
Does anyone have a solution for the weak WiFi performance? Experiencing since I switched to Android 4.4 based ROMs :eek:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Does anyone know the details on the difference between K910 and K910e? Not the official data but on a technical level.

Because now Chinese sellers are selling K910e as a WCDMA phone, but this is intended for China Telecom which use CDMA2000/EVDO.

From the product page at JD.com it says that normally CDMA2000/EVDO is used but WCDMA is supported only for "foreign roaming".

So what I'm wondering is

1) Can you use K910e with it's intended software (VIBEUI_V2.0_1447_7.128.1_ST_K910e) and still use it with WCDMA in China (with China Unicom)?

2) If not, can you flash the modem firmware or the whole firmware from the regular K910 on the K910e and it works with all operators on WCDMA? (including China Unicom in China).
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
yea the same problem with me also.

its clear.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Saiyajin:
So at least I am not the only one. But still, I haven't found a solution yet.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Saiyajin:
So should the file you provided also be renamed to "AMapNetworkLocation.apk " ?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] P1azer:
Could you someone pls tell me, how can I get rid of Security app? If i try to delete it by Titanium backup, the security app is back after reboot. So there must be some other deamon which keeps it alive.

Thank you.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] aehlayel:
Hi Guys,

Has anyone been successful in getting the phone in Diag mode?

I've downloaded the Qualcomm NV Tools from here:

http://xdaforums.com/showpost.php?p=18524176&postcount=1

But I'm not sure if this can help in any way - I do have options to change the phone to "Factory Test Mode".

I'd appreciate any help out here on this.

I have tried the Secret Code crawler app. Seems like there is no service code for changing the USB to diag mode, does anyone know if there is an applicable setprop command for the K910 that takes care of this?

Thanks!
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
Diag Mode = Download Mode

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] aehlayel:
Ok, so I've gotten to the point where I read RF_NV.. but is still not working. I guess it has to do with the radio firmware?

does anyone have any idea if the K910L's radio firmware works on the dual sim K910?

thanks,
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
Can you test this ROM?

[AOSP][KK 4.4.4] ParanoidAndroid for Lenovo K910 [KITCHEN ROM]

http://www.htcmania.com/showthread.php?t=941839
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
OTA update not working 1451 ST

hello,

my phone is official

VIBEUI_V2.0_1447_ST with root,

my phone shows update available.

VIBEUI_V2.0_1451_ST

BUT i couldnt OTA update, after downloading it restarts and black screen with blue light comes.

why?

---------- Post added at 08:14 PM ---------- Previous post was at 07:58 PM ----------

did you find any solution for that?

the phone gets the wifi signal so weak, there is so much difference than my wife's Samsung S3. :confused::confused::confused:

---------- Post added at 08:21 PM ---------- Previous post was at 08:14 PM ----------

Originally Posted by tedulus

i have fixed the location issue, delete AMapNetworkLocation.apk from system/priv-app and repplace it with networklocation.apk from networklocation.zip 318.64 KB, and set the rights of the file to :

X X -

X - -

​​X - -

now it seems that it works ok for any app that needs location,

What does XXXXX MEANS here?:confused:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
Permissions chmod 644

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
from where i can do this? which menu?

i attempted to change the apk file by Root_Explorer, and now?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] JLaCroix:
K910e is really meanted for China only, as you mentioned with China Telecom. It's a 16GB (not expandable), dual sim card that will use a CDMA2000/EVDO sim card from China Telecom in the first tray (supports 2/3G technologies) and the second tray can handle WCDMA 2G only. If you want something that is more universal, pick the K910.

For the SW build structure, if follows this labeling: VIBEUI_V2.0_1451_7.178.1_DEV_K910e (latest)

And lastly, you cannot flash the modem FW. Previously when I flashed the normal K910 ROM over my K910e, it would soft brick the phone. Only restoring back to the official K910e FW would fix it.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Yes, but several sellers sell K910e to international customers claiming the same specifications as K910 (because K910e was sold cheap by Lenovo after K910 was sold out). So obviously it works somewhat/somehow without a SIM-card from China Telecom.

I asked some Chinese sellers but I didn't get much useful information, one said they flashed K910e as K910, whatever that ment.

Personally I'm gettting my hard-bricked K910 back from Lenovo after warranty repair but it would still be interesting to know...
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] JLaCroix:
Sorry maybe my first post wasn't clear enough. The K910 and K910e are not identical. They have different radios. The K910e has a dual radio, CDMA EVDO(3G)/GSM(2G) radio. Whereas the K910(ss) has dual radios that support WCDMA(3G)/GSM(2G).

Of course you can use the K910e outside of China but it will be limited as most sim cards you find around the world will be GSM (2nd slot) and that means it would only support 2G connectivity.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
I know about the hardware, but the K910e support WCDMA "for international roaming" in addition to CDMA. The specification is "CDMA EVDO 800MHz；WCDMA（天翼国际卡国际漫游支持） 850/900/1700/1900/2100； GSM 850/900/1800/1900"

K910e is sold as a WCDMA/GSM phone (equivalent to K910) by Chinese sellers to people around the world without China Telecom CDMA USIM. I want to know how and why it works and if it works on China Unicom WCDMA in mainland China.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] JLaCroix:
I see what you're saying. I have a K910e with China Telecom CDMA USIM and have used in the US... however I have international roaming free from work so I never bothered to switch out the SIM when I was in US/Canada with it. It works for calls... 3G worked sometimes but not always.

I just swapped the China Telecom CDMA USIM and the China Unicom GSM SIM. Doesn't recognize it.

The only way to get true international WCDMA roaming is to use the 2nd SIM card slot... and as I've mentioned it is locked to 2G speeds.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
Anyone test the paranoid android ROM? Excited if it works. Hopefully gives us better performance than stock ROM.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Dubster93:
I tried, and didn't work...

Enviado desde mi Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
Now I'm depressed. Did you find out why it didn't work? I'm going to translate the thread and try to read up on it but if you already know, this would save me some time. Thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] basdel:
my k910 have this menu
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] dagolard:
So choose Update...
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
I want to synch company's email and calendar on this K910 phone. How can I connect to corporate exchange server? In the settings->accounts->add account, there is no choice of "corporate" or "exchange server".

Thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Like many other people, I bricked my K910 using "Install TWRP Easy & Clean - Simple but effective way to install TWRP with just one click". Also it was impossible to unbrick using any Qualcomm, Xiaomi tools etc.

However, I got it replaced on warranty for free (thanks Lenovo!) even though I told them I bricked it myself. It seems they replaced the motherboard or the whole phone since I have new IMEIs and a new serial number.

Anyway, what is the latest stable (or DEV) version that works fine with Google Play and root? Tried 1451 and 1501 so far none of them works.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
it should work. however i think you need to root it and flash gapps in.

here is what i did for my phone:

downgrade to version 4.2.2

root it

flash newest stable version

flash gapps

done.

the only issue I am having is that I don't find a way to connect to corporate exchange account to sync my company email/calendar. In the settings->account, there is no choice of "corproate" or "exchange".
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
Henry,

Have you tried placing the email and exchange apk in the system directory? Works for me. Calendar events only show when you pull down the quick menu though. You can get the email/exchange zip of from this link

http://www.needrom.com/download/multilanguage-mliedroid-rom-v1-51-based-of-1451-st/

I hope someone ports cyanogenmod or aosp soon. great phone, so-so software.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
n1tro, thanks for the info. site needrom is down now, I will try it later.

if we can have CM or similar ROM that will be awesome. not a popular phone so the chance is slim.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Thanks but that's what I tried, it used to work fine with 1420 but now with 1451 etc it didn't work. However, it worked if I didn't root and used GMSTool instead.

Doesn't matter though, because I noticed that I can only get GSM/2G on both SIM slots with my "new" phone, it's impossible to get WCDMA :( (different SIM-cards, setting WCDMA/GSM, "WCDMA Preferred" or "WCDMA only" doesn't help, only 2G or nothing when using WCDMA only). I tried 3-4 different firmware versions including the old SS 4.2.2 but didn't make any difference. I guess it's going back to China again...
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
the site is up and I downloaded the Email_Patch.zip. It is a zip file, should I flash it from the recovery? or can I just unzip it and copy the apk file to /system/app folder?

Is anyone using that ROM "MLieDRoiD Rom v1.51 based of 1451 ST" can provide any comment on this ROM? Do I need to use this recovery http://www.needrom.com/download/twrp-recovery-2-8-3-0/, or other recovery works too? Currently I have CWM v6.0.4.7
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
You can flash it through recovery or copy the apks in manually using root explorer. I've installed mliedroid ROM using twrp. Not sure if it will work with CWM. The ROM is decent, the ROM maker took all most of the lenovo bloatware, left the boot loader unlocked, and kept root.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
This works great:good:

Now I have exchange calendar synch to my phone.

I am using a ROM that's also stripped down from official ROM which I got from the Lenovo forum(it is in Chinese though). One issue I have is that the ROM seems to periodically clean up the background apps, spicifically, I run dropbox to upload photos/screenshot immediately to dropbox. However it doesn't always work, most of time I have to manually open dropbox and then it will upload. This is huge inconvenience for me. In the app switch interface, I already swipe down dropbox app to let it locked. Do you or anyone has similar issue? Is there any workaround?

Another complain I had with this phone is the touch screen. Not pleasant to work with, sometime it is not responsive/accurate, I have to press multiple times with different pressure, and often leads to double pressed something. And more annoying, sometime the screen just randomly pressed itself (I didn't touch anything). usually turn off screen and turn on fix it. It is not often but when it happens it is terrible. I already made a few calls mistakenly. I have shortcut of direct dial on home screen, maybe i should just remove those shortcut from home screen...

I got this phone mainly for the dual sim, in general, it is not a great experience, but not many choices for dual sim phone.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
The master lie ROM is stripped down but has multi languages. As for the apps being auto closed, don't set your power manager setting to power saving. If you do you can pick which apps are exempted from being shut down. Touch screen works fine here. Maybe you got a bad unit. Lots of dual Sim phones out there, just none that is pentaband with the AWS band like the k910. I can't even get the k920 since it lacks AWS.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
Will try this out. Does it mean that there is no need to have greenify app, right? Just turn "disable apps when screen off" to "on", and inside the setting, "check" those apps that should stay on.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
In the Lenovo Factory Menu (Power + Vol down), did anyone try the first option that is "Board Test"? If you did, what were your results?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
Did some testing on the "power manager":

when turn "disable apps when screen off" to "on", it did save more battery, last night my phone got 0.3% per hour drop. normally it is about 1.2% per hour. (I have auto sync off, wifi/data off, kill most of instant message apps).

however, I seems to not able to pick which apps should be exempted from being shutdown. I tested dropbox, with it checked or uncheck, let the phone sit for about an hour, then took a photo but the photo didn't get upload to dropbox automatically, it seems gets killed either way.

Does this feature work for anyone?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Xperia Z3 Dual SIM (D6633) support pentaband WCDMA/UMTS including AWS and even LTE bands 2, 4, 5, 17 etc. However, it's not exactly cheap (but neither is K920).
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
Same here, I need dual sim that works on both China and USA.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
The Xperia Z3 dual is a good phone and I was almost ready to buy it when I found the K910. Reasons why I didn't buy the Z3 dual was because of 5.2" screen and ridiculous price.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Saiyajin:
So I see, lenovo is still releasing updates for the phone - that is a good thing. But has there been any progress on bad WiFi since 1444 ?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
K920 has a ridiculous price too.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] n1tro:
$700 vs $500? I will take $500 any day.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] henry8668:
Does anyone experience that some of background apps get cleaned out? I have tasker installed and there is a task to check gmail every 10 minutes, from time to time, the task didn't run.

In the power manager, I have the option "disable apps when screen is off" set to "off"