yashsingh1/xdaforums huggingface dataset:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
Does not have 2 dial buttons, but it forwards to the local phone application and asks from which line do the call.

I believe the official one is ok.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DalSegno:
(this is getting crazy haha)

Anyone know what action keeps making Contact Manager the default SMS app? I think it might be when it displays a notification.

I re-enabled contact manager, then downloaded an Xposed Module called NotifyClean that lets you block notifications from an app. I blocked Contact Manager and so far it seems to work and it seems to have left Hangouts of default.

I'm using ExDialer (I only use 1 sim).
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] athanaso77:
In some regions there is problem with caller id with this dialer. A good alternative is DW Contacts that support dual sim.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
So can you add contacts now?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DalSegno:
Yes because Contact Manager is running again.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
have you tried with ROM toolbox pro app? License required, but LuckyPatcher has specifical patch ... inside that tool one can make selective freezing. I.E. you can freeze event receptor in "ideafriend.apk" (aka Contact Manager) that are related to SMS. I encourage you to try this app.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
A new stable release was made today: VIBEUI_V1.5_1423_10_ST_K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DalSegno:
I guess the only remaining problem I'm finding is Bluetooth audio interruptions. Stutters once in a while.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
version of phone?

you all guys here using the

Vibe Z ( only Z written) Dual sim no SDcard WCDMA version of this phone,

right?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Right mate.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] hoaletn:
Why we don't use titanium backup pro?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
thanks ,

now decision for met o buy zopo 990+ or this one )))

zopo 1 step better with the price,

as i see Fw support of vibe Z not going good.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
I don't know if latest versions of TBP allow you to freeze specific activities or services of an application. In case it does is as good as RTBP.

Enviado desde mi Lenovo K910 mediante Tapatalk
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
FW support is magnitudes better by Lenovo than by a basement company like Zopo. Zopo doesn't have Kitkat and much fewer updates compared to Lenovo. The only upside Zopo would have if they concenrate on making the FW usable for customers outside China, since Lenovo doesn't (for China only models).
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
i have the same problem, any help please?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
i tried to install csrom 2 which is a 4.4.2 and i stuck on lenovo logo. i cannot long even to the lenovo menu.

i try to boot recovery and i am getting failed : remote locked.

any idea please?

thanks
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
dwonlod this

http://www.gulfup.com/?OS1yH0

then Entry bootloder by Press the raise and lower the sound button, Then connect the Phone To computer.

Unzip the file and click on !_Runme,

i want ask you you have any rom in storg?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
Hello and thanks. i will try right now.

i had copied the qsb file, but i do not know if it is erased or not after the reset.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
i get error device not found.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
inter bootloder mode?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
what is it and how i can get in?

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
Entry bootloder by Press the raise and lower sound button and then pressing the pwoer button , Then connect the Phone To computer.

Unzip the file and click on !_Runme,
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
If you mean to press both vol buttons then this is what i am doing and i get the error device not found.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
this is Chinese recovery Support OTG

http://www.gulfup.com/?VQjou5
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
ok how can i use it?

Do i need to install lenovo usb drivers. I deleted them & i do not have them to install again.

Can you provide lenovo drivers also please?

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
friend Please focuse

First close the phone

then Entr bootloder by Press the raise and lower the sound button, Then connect the Phone To computer With continued pressure on the both vol buttons
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
thanks for your support

here what i get

* daemon not running. starting it now on port 5037

* daemon started successfully *

error: device not found

error: device not found

error: device not found

===================================================

=

= ÅÑαÑºáúαπº¬á ΓÑ½ÑΣ«¡á

=

===================================================

===================================================

=

= ÅδΓáÑ¼ß∩ ºáúαπº¿Γ∞ CWM Recovery

=

= àß½¿ CWM Recovery ¡Ñ ºáúαπº¿½ß∩, »ÑαÑ»«ñ¬½ετ¿ΓÑ

=

===================================================

...

and it stays there forever.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
the lenovo usb drivers Very important, You can not restore mobile without
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
can you provide me please?

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
instal driver and tray

http://www.gulfup.com/?aSp24t
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
ok i am downloading to test it.

what about the otg file you provided? how can i use it?

thanks.

---------- Post added at 12:47 AM ---------- Previous post was at 12:41 AM ----------

I tried with the lenovo usb driver and i keep both vol keys pressed, same problem.

am i doing something wrong?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
Restart your computer

you have minimal adb fastboot setup on computer?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
yes i have.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
The problem in driver
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
Do you have dual sim version k910 or single sim?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Demonicrose:
Dual sim

as per image attached :fingers-crossed:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DonToro:
What's the background? Does the Viberom support only one of them?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
I have dual sim version but I can't see any new version via ota updater...I thought maybe it's phone version related issue. Did you root it? That ota poped up or did you check it manually?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] Demonicrose:
yes rooted.

and it appeared automatically today.

and im currently on k910_ss_s_2_040_0078_131203
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DonToro:
Funny. I also don't receive a ota update. Version 131226.

---------- Post added at 02:05 PM ---------- Previous post was at 01:47 PM ----------

We talk about two different cases. Ota update is for the 131226 version but not for the Viberom.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
I'm already on 131226 so it's normal to appear ota new version if you have older one k910_ss_s_2_040_0078_131203. Relaxed now.

I was able to update to new viberom version 2014 via install.zip without cwm, over custom previous 131226 rom. But big surprise now I can't fastboot boot custom cwm.img, obviosly because of the update. BTW radio baseband version updated also. Still 4.2.2. I will try to downgrade to 131226...
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
Reverted to earlier version 131226 via sdfuse qsb, no problems.

Booted again in custom cwm.img.

Restored data from previous backup 131226 based.

Installed root.

Installed gapps.

Installed VIBEROM_V1.0_1403_6_ST_K910_NK_6A1F.zip.

Result: everything uptodate radio, system, rom vers., gapps working ok, root ok, but no fastboot boot cwm.img anymore.

I tried to replace boot.img in VIBEROM_V1.0_1403_6_ST_K910_NK_6A1F zip with 131226 one hoping it will keep cwm booting capability after update, no success. What should I edit in update zip file before installing it ? What exactly triggers non working fastboot boot cwm.img (targed locked in cmd)?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DonToro:
Same to me. But by checking with SuperSu root is gone. Therefore tried to root again but breaks with "device is locked". :cyclops:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] CSCicus:
try fastboot oem unlock in bootloader mod
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
Steps above and you will be ok. No cwm though.

Did you get something when fastboot oem unlock? Come on...be serious
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] sakilxda:
Hi friends have Multilanguage!

http://www.htcmania.com/showthread.php?p=12256954&posted=1 # post12256954

Someone can test if it works on other more current version?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] DonToro:
Alredy tried. Command results in 3 dots displaying. nothing more.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
Exactly. As for lang batch already tried, no success. Maybe is rom version related. I tried with latest 2014 viberom version.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
Updated to latest DEV rom from http://viberom.com/xiazai.html, cwm booting works again. If you have 131226 version or earlier it's recommended to update first to Stable version and then to Dev (latest). If you have any data to restore then do it AFTER any updates, then apply again root/gapps.

Both ST and DEV viberoms have radio baseband updated (in case you're wondering why the led blinks blue when first boot after updates).
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] sakilxda:
I need help from someone with experience. With the new update I can not flash the language pack. Anyone know how to help please?

http://www.htcmania.com/showthread.php?p=12256954&posted=1
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mpikus:
Bricked K910 Sngle SIM

Well, I was using this nice piece of hardware for about a week when I decided to upgrade the software. I loaded VibeROM dev version, which worked fine, but since it was Dual SIM version, I wanted to push a different firmware.

Long story short - only thing I can get to is ADB Sideload, but whenever I try to upload some firmware, I get error message that either build date doesn't correspond or that product name is not matching.

Anyone able to help?

---------- Post added at 06:04 PM ---------- Previous post was at 05:54 PM ----------

To be precise, this is the error I get.

assert failed: getprop("ro.product.device") == "kiton"

getprop("ro.build.product") == "kiton"

E:Error in /tmp/update.zip

(Status 7)

Installation aborted.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] poweryura:
Root does not work on the lates firmware

Hi

Have anybody tried root on VIBEROM_V1.0_1405_2_DEV_K910

I tried, UPDATE-SuperSU-v1.93 and it does not help...

Thanks
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] katalinscrob:
As posted earlier, sdfuse 131226, update via toolkit first to ST vibe rom then to DEV version. Boot in cwm (works again, tested), root via cwm (either included option when exiting or via install .zip), install gapps.zip. Result is latest dev rom rooted and fully functional gapps.

For the single sim version you should check if you can simply fastboot boot cwm.img. Anyway, how exactly did you brick it?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] csu333:
Hi huys,

I haven't forgot your requests (and mine actually) so I updated the recovery accordingly (I'm a bit slow but I haven't much time unfortunately).

I triple checked my properties and those are set to kiton which seems to be the requested value. I would advice you to check:

your own values (adb shell getprop)

the update script (in the update.zip in META-INF/com/google/android/updater-script)

If both values match, I'm speechless. If not, we should be able to help you somehow.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
but it is recognized correctly.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
Previously show this message

downloading 'boot.img'...

OKAY [ 0.378s]

booting...

FAILED (remote: Locked)

finished. total time: 0.388s

This means the driver is ok(Before deleting driver)

now after instal driver try agin inter the recovary by Minimal ADB and Fastboot and Take a picture
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
The same

C:\Program Files\Minimal ADB and Fastboot>fastboot boot recovery.img

downloading 'boot.img'...

OKAY [ 0.390s]

booting...

FAILED (remote: Locked)

finished. total time: 0.406s

so driver is ok.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
you have Skype user If you have sent in the message
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
Ok i sent it.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
There are some information on Russian Android forum. From 23 of May there is update to KitKat version as well. This version do not need a root. Zopo quality is far away from Lenovo in my opinion.

Regards
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
Lenovo is the 3d smartphone manufacturer after apple and samsung, they even bought motorola with the ideea to enter the americas

Sent from my Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] newbie_vlc:
Rom csrom-v2.1

At Lenovo forum appear the new CSROM version.

The changelog is:

This update

1 Based on the latest official development version 1423_ST

2. Appropriate to streamline some of the unused app

3. Integrated RE Chinese version

4 Perfect Uninstaller Le safety

5 Brush Pack REC repair mistakes (replaced CWREC)

6 Perfect join ROOT

7. Repair charge heating problem

8 Super camera again return

9 Join shutdown reboot into REC

10. Energy saving optimization

11 Optimization telecommunications signals

12 music music player modify the hammer

13.2.0 Notification Center and style file manager

I think I read is the last version of CSROM, I don't know why Legion don't continues with the ROM, it's a bad notice.

Good luck
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] chevchelios:
Hi guys,

I want to update my Vibe Z (OTA) to this version: K910_SS_S_2_155_0912_140604_VIBEROM_V1.5_1423_10_ST. Is this the Kitkat version?

If yes, is this version already rootable?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
No, nothing ota is rootable, u have to boot into cwm, install latest downloaded rom, install supersu, install gapps, and reboot after that connect the phone to pc and run flashrec from erlyer pages to have permanent twrp

Sent from my Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Yes this is a KitKat version but you can not root it if you update by OTA.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] athanaso77:
How safe is that? I read here many people ending up with a "stuck in logo" device after running flashrec
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] tedulus:
I did not encountered any problem, mine is working

Sent from my Lenovo K910
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
what is the meaning of the following?

(bootloader) Device tampered: true

(bootloader) Device unlocked: false

(bootloader) Charger screen enabled: false

OKAY [ 0.016s]

finished. total time: 0.016s

i cannot load lenovo service menu or recovery.

Is there a way to save the phone?

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Is your mobile recognized by PC? What do you have pressing Volume Down and Power Buttons? What do you have pressing Volume Up,Volume Down and Power together? And what exactly mobile do you have?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
the phone is lenovo vibe Z k910. It is recognizes by the pc as lenovo .

i am pressing vol up+down together and i connect the usb cable to the usb port.

the phone opens, vibrates one time, and then i get the lenovo logo. after that i am releasing the buttons. In this case i believe i am in the fast boot mode.

in this state i get the previous results and the phone is not recognized by adb commands.

if i run fast boot reboot etc the phone responding on the fast boot commands.

thanks.

---------- Post added at 10:21 AM ---------- Previous post was at 10:18 AM ----------

trying to load the recovery i get the following,

downloading 'boot.img'...

OKAY [ 0.378s]

booting...

FAILED (remote: Locked)

finished. total time: 0.388s

---------- Post added at 10:22 AM ---------- Previous post was at 10:21 AM ----------

I came to this situation after loading the CSROMv2.0 .

i cannot get the lenovo service menu either.

---------- Post added at 10:45 AM ---------- Previous post was at 10:22 AM ----------

The phone is recognized as "Lenovo Composite ADB Interface"

---------- Post added at 10:58 AM ---------- Previous post was at 10:45 AM ----------

What about if i try to flash with fastboot the stock recovery or the stock boot.img.

Can someone provide me with these?

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
if i press the vol+ button and connect the usb cable to win7 i can see the following device qhsusb_bulk .

Is there any driver for that?

it stays there for 3-4 sec and then continue to boot loader.

is this the download mode?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Your mobile answers and can be recover. You need to download Minimal ADB and Fastboot software and install it on your PC, recovery file (recovery910en.img), ROM file (eg. VIBEUI_V1.5_1423_10_ST_K910_D7B7.zip). As well you can download appks and root files. Put all files to your Minimal ADB and Fastboot folder and try this:

1. adb reboot bootloader or disconnect mobile from computer and press together Volume Up and Power buttons. Wait a few seconds,

2. Connect mobile to PC and write: fastboot boot recovery910en.img and wait until mobile goes to recovery mode. If not (it happens sometime) do it once again

3. From recovery chose adb sideloads to download rom.zip file eg. adb sideload VIBEUI_V1.5_1423_10_ST_K910_D7B7.zip

4. Do not reboot mobile and the same way you can install superuser and appks files.

There is my post when you can install permanent recovery (710).

Regards
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
Can you please provide links for the

1. recovery910en.img

2. VIBEUI_V1.5_1423_10_ST_K910_D7B7.zip

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Hi there,

Here you are:

1. https://yadi.sk/d/CWTfBATWMwD9x

2. http://www.vibeui.com/xiazai_k910_nk.html

or you can use google.com

Regards
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
tried that.

no success.

cannot load recovery, i get remote is locked.

thanks.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
Same problem with my device. I flashed CSROM2.1 yesterday, now it only boots in fastboot mode: no lenovo engineering recovery (tried sooo many times, no adb boot and remote locked in fastboot because 4.4.2 has this stupid lock).

Then as I read in bbs.lenovo forum, the only way is to apply QPST brush tutorial based on Qualcomm's tools. The problem is that we only have a bad translation from chinese forums, and although I have downloaded all the files in the tutorial and I installed Qualcomm tools, I don't know how to boot in QPST mode.

Hope anyone has idea on how to do it.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
Can you upload somewhere the tools ? my download is always stop.

You can get in qpst mode by press volup button and connect the usb to windows.

You will see the lenovo logo flash disappear for some sec, then it will install the driver.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
Here you have the tools,

http://www.mediafire.com/download/pse43tjp3noe4wu/QPST救砖教程_K910.zip

anyways you will need some qpst file (700MB)

Just google for it: QPST救砖教程_K910.zip

If you cant download it tell me, I will take a long long time to upload it... assymetrical suscriber line is what it gets...:eek:
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
Is there one got him this problem

Yesterday install ROM from OTG but separated the OTG before completing the install rom

now Can not access to bootlodar or recovary the phone just Vibrate when press on the power button.

Does not recognize the charger or computer

Only appears as this Video

http://www.youtube.com/watch?v=m2FH-EVUbIo&feature=youtu.be

look the led
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
Now I have the same situation, just achieved it to be recognised from Qualcom as a COM3 port, but after trying to put it in download mode with eMMC software and keeping Vol+ button it entered in that sequence.

It is really weird... hope anyone can light up the path because I dont know what are next steps...
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
Can you give me a link of Explanation will try been applying way
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] ertioct:
http://lefenbbs.lenovo.com/forum.php?mod=viewthread&tid=163368

http://lefenbbs.lenovo.com/forum.php?mod=viewthread&tid=179762&extra=page=1;
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] gimmeluck2:
the problem is that MTK CPUs have problem with GPS, its not sensitive accuracy..

And a Friend of mine bought Vibe Z doublesim and told that ; ALL works amazing but ithas bad camera, , as if its not SONY exmor sensor or F1.8 lens,

LEnovo used different hardware in different countries for K910??

how to understand it ?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] mr.mgmg:
How do you recognised from Qualcom as a COM3 port?

I tried but I was not successful
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] PanNet:
Did you try twrp recovery? It works ok with KitKat.

Regards
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] esofron:
yes with no success.

The question is, how can i go in download mode with a combination of keys ?

i am using the volup key pressed connect the usb cable, get in the download mode but for a few seconds, then it loads the fastboot mode.

i believe if i can get in download mode i can reflash the whole image with this guide from the htc mania http://www.htcmania.com/showthread.php?t=840339

thanks.

---------- Post added at 11:03 AM ---------- Previous post was at 11:02 AM ----------

you need the drivers from here https://copy.com/dWIDcOMy3KBK

also follow this guide http://www.htcmania.com/showthread.php?t=840339
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Dodgy brands have a problem with GPS since they don't use a working GPS antenna. Phones with proper antennas work fine, even if they have MTK CPU. For example Lenovo S920 (MT6589) and Huawei Honor 3X (MT6592) have quite good GPS (not as good as phones with GPS+GLONASS but that's natural). Especially 3X locks very fast and usually on all satellites it finds.

The Vibe Z 4.2.2 firmwares seem to have bad autofocus for the camera, I find that it's better in the new Kitkat ROMS.
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] danero2005:
Can we replace camera.apk with the newer version ?
[Lenovo Vibe Z ROMs, Kernels, Recoveries, & Other D] _mfm_:
Camera can be upgraded in-app so there is nothing special there. It's probably some lower level driver.