yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
I have not tried restoring a full backup, but I did restore my NVRAM partition from another TWRP version backup. Maybe the reason your restore isn't working is because you're trying to restore data from another Android version?
[Android Q&A, Help & Troubleshooting] SO69:
NO. Doesn't work. After restore only thing that works is the TWRP recovery.

The phone only reboots in recovery mode.

Never in OS

Anyway thank you very much Yoshi.
[Android Q&A, Help & Troubleshooting] eryen:
I've tried afew recoveries, also ported working twrp for lollipop firmware. But non of them could restore system partition.

There is some thing strange with system partition. That is not a regular ext4. After wiping it, your restore does not boot.

There is only one way, backup and restore as native emmc partition.
[Android Q&A, Help & Troubleshooting] Dhyef:
can't make the SIM card to work

***********

Hello eryen!

Need your help. I had converted by X2-CU to X2-Ap using the suggested method above. But the problem is I cannot make the sim card work even though I use the NVRAM backup that I had created before the flashing. Do I need to do something else? I think the radio file for the sim card is messed up for I am here in US (El Paso/Juarez Mexico). Can you advise me on this? Can you share to me the radio files and how to flash this files for my SIM card to work (non of the two work)? Thanks a lot......
[Android Q&A, Help & Troubleshooting] eryen:
Please check these steps.

1. Did device recognize your sim cards on Sim Management menu.

2. Do device have proper imei.

About Phone=>Status=>IMEI Information.

3. Do you see any NVRAM_Error network on wifi scan
[Android Q&A, Help & Troubleshooting] Dhyef:
Hello eryen,

1. Yes the device can recognize my sim card.... on sim card management menu, I can it as "active" but the signal is too weak and not stable

2. I see two IMEI from the phone status (1 for each SIM card slot)

3. Yes I see NVRAM_Error when I am looking for wifi spot to connect.

Is there something wrong on my device? Did I miss any steps/process in here?

Note: I also follow the steps you had provided in "needrom.com".

Please do help... thanks
[Android Q&A, Help & Troubleshooting] eryen:
I've send you a PM, because of imei numbers are private.

Because of you have nvram-error on wifi scan, your nvram is nor restored properly, or your imei numbers invalid/duplicated.
[Android Q&A, Help & Troubleshooting] freefallin:
I can't thank you enough for your help!

I just noticed your reply. Quick question before i do this... where is the backup stored?? Is it stored in the computer? Is it stored in the phone?? If it is stored in the phone, wouldn't the backup be deleted when i flash the rom? (since the vibe x2 has no micro sd and has only an internal memory).

Also..how can i restore the backup later?

You said...

...I havent done that so yes please, i need it.

I am sorry...i am a little paranoid of losing the files.
[Android Q&A, Help & Troubleshooting] alexmarkou92:
Hi eryen,

I am facing the same problem. Is it possible to help me via pm?

Thanks a lot in advance

Στάλθηκε από το Lenovo X2-CU μου χρησιμοποιώντας Tapatalk
[Android Q&A, Help & Troubleshooting] ericp2:
CU to AP 223

Hi,

thank you for this. i had issues whereas on reboot, settings for sim 2 would not work. I copy the modem img file and filter accordingly, and it's now correct for 3G. However, it seems that LTE is completely not operationnal. not even a question as to wether i can connect or not, but the MTK engineering app does not even list any LTE related information, ie, no enabled band, etc.. . there is probably still some file in firmware folder which controls this. any idea?

mtk enginerering shows current modem type= 'FDD CSFB' under "World" section in telephony. This may have something to do with it. Since i had not backed up firmware files before flashing the AP lollipop rom, i recovered them from the 1520 CU ROM from needrom (by extracting them from system.img with Ext4unpacker).

Any help appreciated.
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
Follow the instructions in this link: http://thebroodle.com/microsoft/win...loader-usb-vcom-drivers-in-windows/#arvlbdata for installing the MediaTek usb Vcom drivers. Once you have done so, I'll tell you everything you need to know about restoring the data to your phone. :)
[Android Q&A, Help & Troubleshooting] freefallin:
Ok done! Although i'm getting an exclamation mark. Here is a screen shot....

Not sure if its normal.

Also, step 4 of the link you sent me for installing MediaTek says "...Browse, Now select the any inf file", as you can see in the screen shot below:

What is "any inf file"??

All I see is the following:

So I selected MDMCPQ (an inf file). And installed it. Even thought the folder says Win7 and I have windows 8.1.

What now?
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
If your computer is 64 bit, you should have used the Win764 inf file. Ignore the error, right click on the MediaTek preloader device in the Windows Device Manager, and uninstall the driver software. Then reinstall the drivers for your phone with the correct Win764 inf file.
[Android Q&A, Help & Troubleshooting] ericp2:
Hi, i used your procedure, amended by the comments from Yoshi_Guy(thanks to both of you!) , and both sims are active for 2G and 3G. i did not have the files from my CU device before i reformatted everything, so i had to recover them from one CU rom from needrom.com. One thing is strange though: the files you mention here are not the same that i find on the CU rom files: dsp_1_ltg_n.bin and catcher_filter_1_ltg_n.bin do not exist in the original CU rom!!! difference is the "t" in name, vs "w". this may explain why I have no LTE at all, and the mtk engineering app shows nothing for LTE (no band enabled, etc). if you still have those files, could you post them in this thread? i would like to try to copy them onto the device to see if makes any difference for LTE.

Thanks!
[Android Q&A, Help & Troubleshooting] ericp2:
Edit: i was able to confirm that LTE works as well!. sorry for confusion i may have created. so as a summary: conversion from CU KK to AP Lollipop works completely, and is well worth it!

there must be a bug with MTK engineering tool, maybe it's an api version issue, or Lollipop incompatibility concerning LTE functionality.

So as a summary:

- flash TWRP CU with flashtool (download only, check only recovery)

- backup CU nvram with TWRP and copy to PC

- backup the 2 files in /system/etc/firmware : modem_1_lwg_n.img and catcher_filter_1_lwg_n.bin and copy to PC

- backup any other files from your SD card that you don't want to loose (pictures, etc) as next step will reformat everything on your PC

- flash AP ROM with flashtool option format all

- flash AP TWRP with flashtool (download only, check only recovery)

- restore nvram saved from PC with TWRP

- restore the 2 saved files from /system/etc/firmware, make sure rights are 0644 (owner=rw,group=r,other=r).
[Android Q&A, Help & Troubleshooting] MeltingPoint:
Tried flashing my CU to AP but SP flash tool gave me an error and now my phone is stuck in boot loop. What can I do?

Edit: I'm not sure what I did but I got it sorted out. I wen't through a lot of errors I didn't know how to fix. I downloaded some drivers and programs and all of a sudden SP flash tool pulled though without errors. YAY!
[Android Q&A, Help & Troubleshooting] eryen:
I've uploaded CU-1520 and AP-S223 modemm files as flashable zip.

Also a new recovery, which you can use mtp and adb shell while recovery mod. So you can copy files to internal memory and flash them directly in recovery menu without reboot several times.

Link:

MediaFire link: TWRP-X2-CU_1520_modemfiles.zip - http://www.mediafire.com/download/nmdpd66b1wc4ao7/TWRP-X2-CU_1520_modemfiles.zip

MediaFire link: TWRP-X2-AP_S223_modemfiles.zip - http://www.mediafire.com/download/tcb5s9utvz0utxc/TWRP-X2-AP_S223_modemfiles.zip

MediaFire link: TWRP-v2.8.6.0_X2-EU-AP_Lollipop_5.0.zip - http://www.mediafire.com/download/ash4r1v9ymxw6rc/TWRP-v2.8.6.0_X2-EU-AP_Lollipop_5.0.zip

Edit:

For who loses his nvram and dont have a proper backup. This is my nvram backup. Imei numbers, serial and barcode numbers are deleted, so after you flash this zip, you need to repair your at least original imei again with MAUI Meta tool. Other settings are still same.

MediaFire link: TWRP-X2-Generic_NVRAM.zip - http://www.mediafire.com/download/dte671rkmfvee15/TWRP-X2-Generic_NVRAM.zip

MediaFire link: SP_MauiMETA_3G_v8.1512.0.zip - http://www.mediafire.com/download/kwdun9f78ya7l6f/SP_MauiMETA_3G_v8.1512.0.zip
[Android Q&A, Help & Troubleshooting] freefallin:
Ok done. What next?
[Android Q&A, Help & Troubleshooting] nek4d:
Nice work eryen ;)

Kudos!
[Android Q&A, Help & Troubleshooting] eryen:
Added MediaTek signed drivers, no need to restart pc on disable signature force mod.

http://www.mediafire.com/download/64fabkzkk9qfhkm/MTK_USB_COM_Driver_SDK_v1.12.50.0_WHQL.rar

Different vendors uses different ids, so this driver is not universal for all of them.

Update any MTK releated com drivers with this. Select any named driver in it, even Windows warns you about that drivers is not supported, just ignore it. Force to install.

FLashTool, MAUI etc all applications accept these drivers directly.
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
Next, follow the instructions I previously gave you on how to flash TWRP recovery. The instructions are located a few pages back if I remember correctly. (I gave them to you right before you needed help to install the MediaTek USB Vcom Drivers.
[Android Q&A, Help & Troubleshooting] freefallin:
Will do. But just to confirm...by installing TWRP, there is NO risk whatsosver in my files/data being erased/deleted, correct???
[Android Q&A, Help & Troubleshooting] eryen:
No, installing custom recovery will not delete, wipe anything on your device.

IF, you don't mess it. :)
[Android Q&A, Help & Troubleshooting] freefallin:
Just tried doing the steps. Nothing is happening when I connect the phone.

When I get to the part in bold below:

nothing happens. No red progress bar, no nothing :(

I tried different ports, nothing.

The phone lights up and the Lenovo logo comes on...but it just stays there.
[Android Q&A, Help & Troubleshooting] eryen:
Please install lenovo usb drivers.

MediaFire link: LenovoUsbDrivers_1.0.15.zip - http://www.mediafire.com/download/5w1j39awbz6583i/LenovoUsbDrivers_1.0.15.zip
[Android Q&A, Help & Troubleshooting] Xshad3:
Okay guys can you make a reply with all needed files and steps for installing that recovery?

With every previous post there is something else that need to flash that twrp... Please :)
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
That probably means that it was working! The program will appear like it has frozen after you connect the phone for up to a few minutes, and then suddenly a green checkbox will appear saying "Download OK." So I would try it again and give it 5 minutes.
[Android Q&A, Help & Troubleshooting] eryen:
For kitkat

MediaFire link: TWRP-v2.8.6.0-X2-CU_Kitkat.zip - http://www.mediafire.com/download/k9wopzw8bbj1ctj/TWRP-v2.8.6.0-X2-CU_Kitkat.zip

MediaFire link: TWRP-v2.8.6.0-X2-EU_Kitkat.zip - http://www.mediafire.com/download/6xkr18vh6hu84dc/TWRP-v2.8.6.0-X2-EU_Kitkat.zip

For lollipop

MediaFire link: TWRP-v2.8.6.0_X2-EU-AP_Lollipop_5.0.zip - http://www.mediafire.com/download/ash4r1v9ymxw6rc/TWRP-v2.8.6.0_X2-EU-AP_Lollipop_5.0.zip

Flash the right one for you with sp flash tool.

Enter to recovery mod directly. Or lenovo will restore original one in next boot.

To enter recovery mod.

After unplug data cable.

1. press and hold vol up + vol down buttons.

2. Start to press power button too.

3. When device vibrated, release power button. Hold vol buttons until you see twrp recovery screen.

Twrp will disable lenovos restore original recovery script in system folder. So you can use twrp recovery when ever you want.
[Android Q&A, Help & Troubleshooting] Xshad3:
How long i have to wait till flash tool download this files?

Im waiting for more than 15min... and yet zero progres. What im doing wrong?

Edit: I think i made it, but instructions wasnt clear enough. I thought i needed to wait FT to download files and after downloading is done then to connect turned off phone.

And after i entered in recovery then i touched reboot to system recovery returned me a message that asked me if i want to install SU and now phone is Frozen at startup screen:

lenovo

powered by

android;

for more than 5 minutes. Is this sign for bricked phone?

Sorry im new to android system and this flashing tools. Before on kitkat i used kingroot app to root my phone cuz i wanted to cheat on some games and disable annoying ads.

Edit 2: However i tryed wipe, factory reset still no progress. But even after factory phone still stays at loading screen
[Android Q&A, Help & Troubleshooting] freefallin:
Its not installing. I'm getting the following msg:

---------- Post added at 01:37 AM ---------- Previous post was at 01:31 AM ----------

I just gave it 10 mins. Same thing. Nothing is happening.
[Android Q&A, Help & Troubleshooting] Xshad3:
Don't worry usb drives are installed after start of exe file.

You need to install this too: http://www.mediafire.com/download/64fabkzkk9qfhkm/MTK_USB_COM_Driver_SDK_v1.12.50.0_WHQL.rar

In previous page was posted link for guide to install it.

After you click on Download connect your switched off phone and this magic will happen.

Guys I think this twrp have some build in error. I tried few times to flash this version, after successful flash I start phone and enter in recovery but after I try to reboot phone to normal boot phone freeze on that first screen. I tried with twrp from Russian form kda or whatever it was and it worked from first time without any error. :p
[Android Q&A, Help & Troubleshooting] freefallin:
Well thats weird...why would it say "cannot complete installation" if its installed? In any case its still not working.

How do i install the USB driver you linked? The same way Yoshi linked? Or use the exe file?. Does that mean i have to uninstall the one Yoshi linked and install this one? Or just install both together?

EDIT: just noticed you said to use the method that yoshi linked to intall it. I just did that. I uninstalled the one Yoshi linked and installed yours...no magic happened :(
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
Try this:

-Open Windows Device Manager

-Plug your phone into your computer while it's on

-Power off your phone while it's plugged in

-See if you notice a device appear called something like "MediaTek USB VCom" or maybe "MediaTek Preloader Device"

-If there is a little orange exclamation symbol by it, quickly right click on it! Then, proceed to install the MediaTek USB Vcom Drivers to that device by selecting to manually search computer for the MediaTek USB VCom Drivers.
[Android Q&A, Help & Troubleshooting] Xshad3:
First you need this: MTK USB COM Driver SDK

Then follow this guide: For Windows XP, Vista and Windows 7 Based Operating systems to install it properly.

Or this guide of you are with: Windows 8, 8.1 or Windows 10

This links for USB COM Drive and how to install guide are provided by [MENTION=6755930]Yoshi_Guy[/MENTION] who posted it on previous posts, so if it works hit his "thanks" button.

Good luck.
[Android Q&A, Help & Troubleshooting] mayankneil:
Rashr

any one having driver issues! just download d recovery and flash it via {root}rasher from playstore! it s easy and simple! and there

s n option for backup kernal and recovery as well!

:)

tested myself on AP
[Android Q&A, Help & Troubleshooting] alexmarkou92:
Hi i am having problems restoring my imei with maui meta. My pc does recognize my phone in meta mode as vibe x2, but not as a gadget cdc vcom driver. Maui meta does not see my phone. What should i do?

Thanks in advance

Στάλθηκε από το Lenovo X2-CU μου χρησιμοποιώντας Tapatalk
[Android Q&A, Help & Troubleshooting] freefallin:
Just tried this...nothing happens/changes when i plug phone in or power it off while plugged in.

I can see "MediaTek USB Preloader"(?) with the exclamation mark (error code 10). It stays the same regardless if phone is plugged in or not.

As a reminder...the phone does not load android (the os). It just boots to recovery only. Also when i plug the phone to the computer, the screen turns on to the lenovo logo and thats where it stays the whole time. Turns off when unplugged. So yeah, not sure if that's normal and if that's what's actually supposed to happen.
[Android Q&A, Help & Troubleshooting] Xshad3:
I've already said that Android doesn't want to start with this twrp.

Now you need to flash lollipop Rom from needrom. Then get twrp and supersu from here.

After you flash new rom start phone for first time and copy supersu somewhere in phone.

Then flash 4pda's twrp and enter in recovery after flash. Install supersu and reboot.
[Android Q&A, Help & Troubleshooting] freefallin:
But wouldnt flashing lollipop Rom delete/wipe my data?
[Android Q&A, Help & Troubleshooting] nolly24deleon:
huh. anyone help?.. I want to root my lenovo x2-eu lolipop..

I'm. tried many kinds of rooting apps. like framaroot/z4root/kingroot 3.5.0 n latest versio/rootmaster. but its all failed.. then I tried the rooting method of bardP780 flash the custom kernel to use vroot to root your phone.. but after a flash the boot.IMG.. aha. my phone is bootloop.. its failed..

n I have a question? can I flash a twrp recovery using SP FLASH TOOL without root? n flash a flashable.zip to root my phone??
[Android Q&A, Help & Troubleshooting] Xshad3:
Yes, it will wipe all data on your device. But give a try to flash 4pda's recovery before you flash lollipop rom.

You can get root access only with flashing twrp recovery and then install supersu from recovery. Just to notice if you want 100% success without bootloop flash 4pda's recovery.
[Android Q&A, Help & Troubleshooting] nolly24deleon:
can u give me. a link sir?!! I flash it through so flash tool sir?

---------- Post added at 12:40 AM ---------- Previous post was at 12:22 AM ----------

can I flash TWRP-v2.8.6.0_X2-EU-AP_Lollipop_5.0.zip through so flash tool sir without rooting my phone sir??
[Android Q&A, Help & Troubleshooting] Xshad3:
TWRP in this post is for Lollipop 5.0 EU ROM!!!

1st install Lenovo USB Drivers.

2nd you need to install this: MTK USB COM Driver SDK, more specific you need to install DA USB VCOM Port and PreLoader USB VCOM (Follow this guide: For Windows XP, Vista and Windows 7 Based Operating systems to install it properly. Or this guide of you are with: Windows 8, 8.1 or Windows 10.

3rd download TWRP and unzip it.

4th download and copy SuperSU archive in phone memory (just copy archive without unzip it).

5th you need SP Flash Tool. Run it as administrator. Open scatter file in twrp folder. Go to Options/Download and make sure DA DL ALL with Checksum is . Then go to main window and make sure there is selected "Download Only" from this dropbox below scatter-loading file. Now press download and connect your TURNED OFF phone. The process will start and bar at bottom of the window will became red then yellow then grey and green circle will appear once flashing is done.

6th turn on your phone and enter in recovery immediately with pressing vol + and vol - buttons after phone vibrate when you press power button (if you didn't open recovery and phone boot normal you will need to flash again twrp). After you enter in twrp touch "Install" and find SuperSU archive and install it. After install reboot phone and there will be supersu.

File sources:

SP Flash Tool link from Yoshi_Guy

Lenovo USB Drives link from Yoshi_Guy

MTK USB COM Drivers link from Yoshi_Guy

Guide for installing COM Drivers link from Yoshi_Guy

Twrp: I downloaded it from 4pda.ru forum

SuperSU: I downloaded it from 4pda.ru forum
[Android Q&A, Help & Troubleshooting] ericp2:
Mtk engineering does not show LTE data correctly (CU to AP)

Hi,

I have made the conversion from CU to AP, and after one week, i am really happy with it. all works very well, except that MTK engineering app cannot show anything at all related to LTE (MTK settings -> LTE information -> select 4G LTE support band menu and "Check Information". the result list is empty, here's an extract:

num_supported_band: 0

supported_band[0]: 0

supported_band[1]: 0

.....

supported_band[63]:0

this is coherent with "band mode" shown for sim1/sim2, which only shows:

EGSM900

DCS1800

PCS1900

GSM850

and nothing else for LTE. This used to work just fine for CU-KK Rom.

can anybody that has AP Lollipop or CU-AP converted Lollipop confirm this? does anybody have any idea how to resolve this?

Thanks!
[Android Q&A, Help & Troubleshooting] eryen:
In default, primary sim slot uses 3G/4G modem files. If you select second sim card as main data connection slot. Engineering mod menu shows only 2G bands for both of slots.

Current modem supports only LTE 1-3 and 41.

If your operator uses differend band. You need to replace primary modem files from other roms as supported.

Otherwise, ap rom supports most of european 3g frequencies.
[Android Q&A, Help & Troubleshooting] Yoshi_Guy:
I think I figured out the problem! If may have to do with the Driver signature verification. You need to disable this. Follow the instructions in this link: http://thetechnolyte.blogspot.com/2014/04/installing-vcom-drivers-in-windows-81.html

On how to install the drivers and disable the Driver signature verification.
[Android Q&A, Help & Troubleshooting] freefallin:
Hey Yoshi!

I'd already done all what you linked. Its about the same instruction as the one in the previous link you posted. Everything went according to the previos link you gave (for installing MediaTek USB VCOM). I disabled signature the way the instruction said to do it. It gave me the "Are you sure you want to install this unverified...etc?" msg. It finilized the installation...basically, everything went according to the instruction. But when i get to the part of connectin the phone...nothing happens.

---------- Post added at 08:45 PM ---------- Previous post was at 08:40 PM ----------

Well that defeats the purpose then. The whole reason i am doing this is to backup my data and not lose it.

4pda's recovery? Do i flash it the same way as TWRP? Can i use it to backup my data?

---------- Post added at 08:59 PM ---------- Previous post was at 08:45 PM ----------

Thank you for putting everythig together Xshad. Ive already done all of that. Its basically then same as what Yoshi's been posting. My problem is that the computer doesnt seem to be seeing my phone. When i plug it to the computer...the Flash Tool doesnt see The phone...so nothing happens.

4th step of your post (which ive underlined above) seems to be somethig no one has suggested. Unfortunately, i cant see my internal phone memory because the OS is not loading on my phone. My phone only boots to the (stock) recovery. Hence the reason i want to flash TWRP....in order to get my data from the phone memory.

If i could see/access the phone memory then i wouldn't be trying to do all this. I could just copy all my files.
[Android Q&A, Help & Troubleshooting] Xshad3:
Yes, you flash it same way. Actually 4pda version of TWRP it is the same as the "clean" (original TWRP) but with the difference that works on 100% and doesn't make your phone to freeze at first loading screen.

So do you have both: DA USB VCOM Port and PreLoader USB VCOM Port? I have them both and they have error code 10 and I flashed successfully twrp.

My VCOM Ports

When I was flashing for first time twrp and then I entered in it, recovery asked me if I want to install supersu and when I accepted to install supersu simply nothing happens. Then I saw one post in other forum that was said about installing supersu from archive through recovery install options.

Try to flash again twrp and see if phone is loading Android. If not then try to flash: preloader, boot, recovery, preload, system and cache from this Lollipop ROM. However I'm not sure if it's gonna work this way. Hope it will :-\