yashsingh1/xdaforums huggingface dataset:
[Android General] Ranmamez:
Hello.

I'm sorry to get here and ask for help but I'm really stuck.

I have the european version of the a2107a-h, 3g, dual sim, 16 gb storage (in the back label says "model name: 2298").

I used the device happily until now, when I noticed that the tablet sometimes is not so fast or responsive and mostly that the memory is divided by base 4 gb and "external" 16 gb, seen as an SD card in the settings section: the base 4gb memory is getting full while the 16 gb part is almost empty, except for 4 apps that I could move from the base to the "external" memory. Be clear that I don't have any SD card of 16 gb and I never installed any SD card in the tablet.

For everyday use, I deactivated the preinstalled Norton Security and installed Avast for Mobile instead, but now I think that Norton still occupies memory even when deactivated, so now I want to fix everything.

My goals are:

to get more performance on everyday use, making it fast and responsive all the time, I don't care on gaining speed as 10% or such, I just want that it wouldn't get stuck on some simple operations;

to get free of all the bloatware, starting with Norton Security then everything else I don't need;

be free to install whatever app I want into the 16 GB internal memory, naturally except system or particular apps.

I guess that to get those goals I need to root the device, and that before rooting it I should do a full system backup, but reading the main posts, I'm stuck on how to install the VCOM drivers.

I only managed to install the ADB drivers, googling for the VID&PID and finding a zip package on driveridentifier (I got the "Lenovo.zip" one).

Can anybody please help me?

Thanks!
[Android General] Ranmamez:
Hello? Anybody home?

Come on, don't be shy ^^

I really need some little help :'(
[Android General] sverza:
VCOM drivers are requested when the device (the tablet) is connected to the pc. The tablet has to be switched OFF.

The pc recognize a new peripheral, and at the same time you can install the driver.

Pay attention: the tablet stays in this situation some seconds, after that it switches to another "level" (you see the green charging battery at the display) and during this step drivers aren't requested anymore (and you can't do anything with pc/tablet).

A piece of advice: the first time you surely won't have time to install drivers before the tablet switches its modality: no problem, let's go the tablet in "battery view" meanwhile you install driver

Done this, you're ready, disconnnect the tablet from the pc and the connect it again..

Advice 2: if you haven't any particular data to backup, you can avoid the backup. If you need it, I can share the mine for you (not worry, I did the backup when the tablet was new new, as original).

In this way you can root it and then flash the rom you want
[Android General] Ranmamez:
Ahh, now I get it. Ok, done.

Thank you but I have data to backup.

Next step, after installing SP Flash Tool, is to get a scatter file, and to download it: I downloaded it, but I'm kind of afraid because I read in the FAQs that there are 2 programs that convert the firmware.info file into scatter.txt, and I'm supposing that it would be better to use a scatter file made directly from the device than downloading one. Am I right, or my fears are futile since it would be correct either way with the downloaded scatter file?

Thanks again for your answers.
[Android General] sverza:
For the backup, use MTKDROIDTOOLS (Search on XDA, there is a guide).

It will root (also temparally) the tablet (operation needed to backup), it creates a backup CWM recovery compatible and it creates also file necessary to flash the backup via SPFT.

In this way you don't have to use SPFT to backup our data

You're welcome, but for this there is the THANKS button
[Android General] Ranmamez:
Ok, I'm trying to use it but I get stuck again: I got the 2.5.3 version but when clicking on the big ROOT button, and on the tablet tapping on "Yes, restore my data", MTK Droid Tools do nothing except looping the green bar... I left it for about 1 hour but to no avail.

Yes, sorry, just used it :)
[Android General] Ranmamez:
Can you answer me please?

I'm stuck again: MTK Droid Tools doesn't temporarily root the device, or so it seems, it doesn't show anything.

I tried even SP Flash Tools, after making the scatter file with MTK Droid Tools, but the guide isn't correct (in meta mode i can't install any driver, but it works with the preloader driver) and after some megagbytes the computer crashes with a BSOD.
[Android General] Ranmamez:
Hello? Am I alone again?
[Android General] sverza:
Which OS are you using on pc?

Pay attention: even if you backup your data, I don't think you can restore it into the new flashed rom, you will corrupt the rom.

I'm also thinking you could have some issue with ADB driver, due to the fact you have some issue in connecting to MTKDROIDTOOL.

BSOD: do you have some issue with USB ports on your pc (it happened to me, with another device, and I've found it was the USB port of the pc)?

Anyway, at this point is better you personally root your tablet and then dump the rom with MTKDROIDTOOLS.

To root the tablet my advice is to use the "4.03root.zip" (it's the name of the zip file. In this zip file there is also the necessary to manually root the tablet)
[Android General] Ranmamez:
Vista x32 sp2

I don't mean to restore the backup into the new flashed rom, but to backup just to reflash it completely. Well, I guess I should just backup stored data the normal standard way (microsd, or via android manager on pc), then proceed to root the device.

BTW, when you say "new flashed rom", do you mean a custom rom?

I really don't know very much...

Well, I have some little issues with some usb devices, like: I can't wake up my pc from the usb keyboard or mouse, but when the pc is "awake", they work flawlessly. pendrives and usb hdd works good as well, everything doesn't seems working wrong, but I admit I have the feel that something went wrong...

Ok, then, I'll prepare a spare rig with Windows XP x32 sp3, fresh clean install, then proceed: am I right to use this OS instead of Vista?

Thanks.
[Android General] sverza:
In fact, you can backup your data with standard feature android os give you.

Yes, I mean a nw custom rom

If you connect the tablet to pc, open MTKDROIDTOOL and then no info related to the tablet (processor model, ...) is showed then you have issue with driver ADB (you can check some messages (yellow icon) on device manage of your pc

Sometimes an extension usb cable is sufficient to corrupt a good connection between pc and device

I prefer XP. Pay attention: install correctly drivers.

You're welcome but as I wrote some posts ago... the THANKS button doesn't injure you
[Android General] Ranmamez:
Yeah, finally I found a pc suite/manager to backup most of the data, I used SnapPea.

Yeah, well, it showed the tablet info, but now it doesn't matter, I used the win xp 32bit (fresh-clean install) rig.

I don't use extension usb cables, I guess there's something wrong or corrupt in the vista registry or I don't know what else.

Yeah. Well, finally I achieved to root the tablet, then I installed Titanium Backup as read in some other thread here and tried to uninstall the Norton Mobile Security, and it worked.

Anyway, I don't really need to switch to a custom rom, neither to change the launcher, what I just need now is to merge the internal "extended" memory, seen as USB memory (or even SD card) with the main memory: is it possible?

Or at least to force the system to let install much more apps to the internal "USB memory": can you help me?

Yeah, sorry, old habits: I surely click the button (and I did it) ;)
[Android General] sverza:
No, the system has 2 different partitions

One for the system and applications, other one for your data.

Honestly I don't know if in the orginal ROM the option that allows to install application on an external sd is available
[Android General] Ranmamez:
Ah, so a custom ROM would solve this issue? If so, which one do you suggest me?

Can I also install the original launcher on it?
[Android General] sverza:
No.

It seems application partition can't be bigger than 2GB, otherwise there could be some general working issues.

And in few words, we can't have an unique partiotion on this tablet.

I know user Syserr can generate a application partition = 2GB.

Otherwise I have an update that extend your original partition to 2GB, but you need:

- tablet rooted

- CWM recovery installed

- after flashing the extend application partition update you have to flash a ROM. And here you can decide wich ROM.

Basically I've tried 4 ROMs

1) original: no phone feature, lot of applications useless (in my opnion), some lacks

2) MIUI: bad, not stable

3) Foxtrot100: like the original, with working phone feature, cleaned by some useless application, stable, smooth

4) XnetFox 3.6: started from Foxtrot100, with working phone feature, some bug fixed, cleaned by ALL useless application and very very light (there are only basic applications, in this way user decides what to install), stable, smooth. I'm using this one with partition data = 2GB

On the net you can find every ROM I have described, except the 1) flashable with CWM recovery. I have it, in case I can share it

About the launcher, I'm not sure but a part MIUI rom launcher is always the same
[Android General] Iran-Lenovo:
Tablet didnt trun on after ROM Change.

is anybody have my problem ? if u know what i need to do please let me know !!

after i want change my ROM to some rom with call option , my tablet was turn off and didnt turn on !

someone tell me maybe the boot file of it was gone !

any idea to how i fix it ?

Please let me know.

Thanks.
[Android General] syserr:
I will paste your other start of thread here. Since our tablet doesn't have a sub-forum, it's best not to spread to wide with threads I think.

So, the good news is... if you do not have good hardware, you can recover. That is, I believe there have been a few people that have bad flash or something and SP Flash Tool will not write to their devices.

What ROM are you trying to install? What version of SP Flash Tool? I assume you have a 2 SIM version, is it 4GB or 16GB?

Sometimes it is easier to install "WHOLE" ROMs. This is how I got started since you can't mess up the partitions that way. It does take some time though.

I will answer more when you have given the above information.
[Android General] Iran-Lenovo:
thanks dear syserr , you made my day.

i use this tools ,

ROM : hxxp://lenovoroot.blogfa.c o m/post-2.aspx

and another ROM From xDA

about 16 or 4Gb i need to check , cause im at work and need to back to know.

Thanks syserr , please help to fix this problem.
[Android General] Iran-Lenovo:
UP !

Please someone Answer me.

its about days and nobody not help :crying:
[Android General] syserr:
Well, if you aren't sure you have 16GB, then you can just assume that you have 4GB -- because 4GB layout will work on 16GB. I don't know the ROM you linked to. I removed spaces and replaced xx with tt, but came up Error 404.

I might have already said this, but the technique of flashing with SP Flash Tool can be seen in my video here: https://www.youtube.com/watch?v=9V7m9UCM4-c

There are files for the A2107A in this thread:

http://xdaforums.com/showthread.php?t=2471194

The shortest path of seeing life on your tablet is to flash a "whole rom" to it with SPFT. This would be writing a a full dump ROM directly with "Write Memory" at location 0x0000. I think I have more information earlier in this thread. I have dumps of my Vodafone and AT&T, but I've never had a generic A2107A-H, so I never made an SPFT ROM that was well suited for it. In this method you don't need an accurate scatter.txt file. But the tool makes you load one anyway, even if it doesn't use it's information. (This is the first thing I learned to do, because backup and restore in this way is failsafe and after bricking my first tablet following MKDRT tutorials -- I was done relying on that method.)

But, we don't have a whole ROM dump for you, so the next best thing... SPFT ROMs.

Grab ClearSky ROM since it's the simplest for your version of the A2107A:

https://drive.google.com/file/d/0B8PcIZoLeGNudkFDTWVoX240UEk/edit?usp=sharing

I know you've been trying to flash SPFT-style ROMs, but lets stick to the basic one ClearSky.

Much better instructions earlier in this thread but here:

1. load scatter file (not rename it)

2. Format (All)

3. Download, but make sure you have all partition/blocks selected first.

(watch the video and read the first 5 posts in this thread)

Note: You probably have an MBR, EBR1, EBR2, or boot.img that does not match the partition/block layout. This is why you should Format with ClearSky's scatter loaded. After that when you download everything including the MBR, EBR1, EBR2 and boot.img... everything matches.

I will try to help you through this in the next few days.

The attachment shows the difference between 2 of your scatter files. ClearSky's layout is the same as your original scatter file in your zip.
[Android General] Iran-Lenovo:
Dear Syserr.

i dont know how to say thanks to you.

you give me best tutorial

Tablet is turning on ! i dont use ClearSky Rom btw its ok now ! and when its turn on i get shocked cause Call option was active on it :laugh:

im really happy now , if i can do anything for you just tell me :good:
[Android General] jewel ahosan:
I want Root N CWM file, attached please

I want Root N CWM file, attached please
[Android General] syserr:
In this thread: http://xdaforums.com/showthread.php?t=2471194

At the bottom of the first post is all you could ask for pertaining to the A2107A:

Tree of Tools for the A2107A

------------------------------------------------------------

in my A2107A directory
[Android General] ProjectNorthern:
Good day everyone! I would like to ask for help regarding USB Driver of my Lenovo A-3000. Can anyone share the driver please? Thank you!
[Android General] syserr:
I suspect you have XP and not Win7 or newer, since it has more trouble. Most likely if you grab the universal USB driver for Android and add your VEN_ and DEV_ lines to the .INF file, you will have success.

You may need to do some research.
[Android General] ProjectNorthern:
I'm using Windows 7. How do I do that? Where can I find those? I've been searching for the driver since I bought this and all I can find is crappy installer.
[Android General] syserr:
First... I'm assuming we are talking about ADB USB drivers or the "VCOM" drivers that let SPFT talk to the tablet, not drivers that allow access/mount the internal flash drive.

I think the drivers are supposed to be in the installer. The "virtual CD" that was supposed to popup when you plugged in the A2107A-F didn't seem to work for me. In my case that was a defeat, since that was how I was supposed to load the software on.

https://drive.google.com/file/d/0B8PcIZoLeGNuOEI2dTYtNnpSOW8/edit?usp=sharing

https://drive.google.com/file/d/0B8PcIZoLeGNuUTFIT1J2eXNFd28/edit?usp=sharing

These are what I used on XP. VCOM for Win7 I think should just work. ADB you could use my package and maybe add VEN_ and DEV_.
[Android General] ProjectNorthern:
Thanks man! Will try this as soon as possible. I hope this will work. Because, it's hassle for me to copy a file to USB and use OTG just to copy the file to my A3000.
[Android General] syserr:
I frequently use ES Explorer (on Android) to copy to/from Win shares over WiFi.

It sounds like ADB/VCOM drivers are not what you need. :( You want it to show as a drive etc in Windows I think. In this case, it should "just work" but you probably should go to Settings -> Storage and see if it is exported as "USB Mass Storage" (UMS) or MTP or PTP.
[Android General] ProjectNorthern:
I already tried over the wifi. But if am transferring a big file size, it usually disconnect itself around after 20 or so percent.
[Android General] Milandas01:
Thanks man i'll try this as soon.I hope this

will work
[Android General] dan1239:
Um....

Jelly Bean Rom anybody? Development occurring? I really hope that this tablet doesn't just die, mostly because Lenovo had just dissed it like not that long ago. Please, I would really like a Jelly Bean Rom or something that would make this tablet run at it's best. :.(
[Android General] syserr:
At this point I would be happy for being able to compile a whole ROM from source... even if it's ICS. As long as we could improve things a bit. Example: utilize the -F FM Radio.
[Android General] dan1239:
Yeah hehe, I would really appreciate that and so would a lot of people I bet. Also I can't get my tab to connect to my laptop or my pc. I tried everything, restart, reset, erase cache, data, dalvik, system, I even reflashed the rom. Nothing will seem to work. It shows on the tab that it is charging, but nothing from the computer not even the device connected sound. The tablet shows no sign of being connected to a device either, just charging. Everything works fine on the tab, no issues, but just this one HUGE issue... Please help me if you can, or somebody on this forum. I'm counting on ya'll. ;D
[Android General] syserr:
And elsewhere:

Open Device Manager (on XP or 7) and watch the device tree as you insert your USB cable that is attached to your running tablet. Did anything change or flicker? Also... you could boot Linux (off a Live CD) and plug in the tablet.... if you run "dmesg" in Linux at the bottom of the output you should see some USB messages.

Do that first.

You an configure your Tablet to behave differently when plugged in to USB. If I remember right though, you should see a notification on Android just after you plug it in... then you could swipe down on to configure USB storage etc.

Have you enabled USB Debugging in Settings -> Developer Options ?
[Android General] dan1239:
I've already tried usb debugging, and i have tried Ubuntu but not doing the command part so I guess i'll try doing that when I have time. Thanks for the help! :D
[Android General] Can0dope:
[MENTION=5228486]dan1239[/MENTION] Have you tried a different cable? It sounds like you might be using a "charging cable" instead of a data cable... It's worth a shot anyways.

I'm also having trouble connecting, but my issue is slightly different... When I connect to my computer, it attempts to install drivers, but fails 2 of them; A2107A-H and CDC Serial. Device Manager shows both of these as "Other Devices" with the little exclamation mark. It does not show up in "My Computer". The notification bar on the tablet says it's connected to USB debugging, but I can't access it from the computer...

I've tried multiple cables and multiple computers, all with the same result.

I've also tried several different drivers that I've found on the Web, to no avail. :'(

Update: My problem magically solved itself. I plugged it in today and it just worked. ?
[Android General] dan1239:
[MENTION=4168942]Can0dope[/MENTION] I've already tried all of my cables and none work. [MENTION=4796707]syserr[/MENTION] I went into CWM and I tried mounting usb and nothing happened, but when I went into advanced and clicked show log it gave me this output:

"I:Trying /dev/block/mmcblk0p4 on LUN file /sys/devices/platform/usb_mass_storage/lun0/file

W:Unable to opem ums lunfile /sys/devices/platform/usb_mass_storage/lun0/file (No such file or directory)

I:Trying /dev/block/mmcblk0p4 on LUN file /sys/class/android_usb/android0/f_mass_storage/lun_ex/file

W:Unable to open ums lunfile /sys/class/android_usb/android0/f_mass_storage/lun_ex/file (No such file or directory)

W:Could not disable /dev/block/mmcblk0p4 on LUN 2

I:Can't partition unsafe device: /dev/block/mmcblk1p1"

I sort of have no idea what is wrong... I don't know if I should try to reinstall stock recovery and then CWM again. Please help! Thanks Again!
[Android General] krustyzy:
Hi guys,

I hope this is the right place to ask my question. I have an European Lenovo A2107A-H dual-sim tablet which I have beenn using (and flashing) for some time now. Unfortunately, something went wrong a few days ago when trying to restore a former nandroid-backup and I already suspected my device to be bricked. By trying with various ROMs, I managed to revive it.

Unfortunately, I accidentally flashed a single-sim ROM (stock AT&T from US market) on my device. This results in the following situation:

- flashing a dual-sim ROM does not reveal any SIM functionality (menu item remains grayed out)

- flashing a single-sim ROM only allows access to the first SIM (well I expected that)

- NVRAM backup which would probably resolve this situation is not available

Trying to flash a generic European stock ROM did not help. Instead, no SIM access is granted here as well.

Does anybody happen to be able to offer a solution for this issue? I would prefer not to use a WIFI-only tablet in the future ..

Thanks!
[Android General] syserr:
In CWM, you should have access to ADB. Can you run ADB... "adb device" and "adb shell" ? If so.. your USB is fine and your "VFAT" filesystem in flash is corrupt and needing formatted.
[Android General] syserr:
Yes, a NVRAM partition/block backup would have resolved your problem.

I'm actually working on a slightly different problem but has the same solution for sevenRA1. I think I have some dual-SIM NVRAM blocks floating around. I'll blank out the IMEI and let you guys try them. If that works, we can hexedit in your MAC... but I have not been able to write IMEI directly to the block, so you'd need to used the sub-standard method of writing IMEI to /data/nvram with one of the tools out there.

I'll see what I can do.
[Android General] dan1239:
Uh can you be more specific... I dont really understand what you mean.
[Android General] syserr:
While your tablet is booted into CWM, it should be available for ADB to attach to. So from your PC (Windows/Linux) you should be able to run ADB commands to talk to it. This will work around potential problems with your ROM, and let you know that your hardware is good.
[Android General] syserr:
Asked how a person could update their NVRAM partition without Windows

The following was taken from a PM.

Of course you need root.

As root I was able to get the nvram partition image like this:

dd if=/dev/nvram of=/cache/nvram.dd bs=3145728 count=1

If you don't restrict the length like that, then it apparently keeps going.

You should be able to do the reverse to force your image on:

dd if=/cache/nvram.dd of=/dev/nvram bs=3145728 count=1

I would follow that with a "sync" and hit the reset button to kill power. MTK has a weird algorithm on when to use /data/nvram and when to use NVRAM partition, I'd hate for the NVRAM partition to get updated by /data/nvram, so cutting power after sync should ensure that doesn't happen.

THEN, on first boot go into recovery and Wipe Cache/Data because you want your /data/nvram to be built from the NVRAM partition.
[Android General] syserr:
I soft brick my lenovo ideatab a2107a-h 16gbl-pe

I replied here as you posted this in an odd thread/forum.

Stopping boot at first logo could be many different things. Maybe you can boot into recovery and clear data/cache? If that doesn't work, it's having trouble booting the kernel I think. First logo is displayed at bootloader time.

You map want to read some of my threads in my sig. If you find that Windows can't find a driver to match your DEVICE ID, you can edit the .INF file that comes with your driver... some info: http://xdaforums.com/showpost.php?p=47661185&postcount=2027
[Android General] Andrew72nd:
USB Connection issue

Hello to all,

I need some help regarding my USB connection when flashing with sptf.

So, I start the flash tool , select the scatter file and hit download , then I connect the tablet (as I saw in many tutorials: keep the reset button down , connect usb, release reset button...etc ) the device connects(I hear it and I see it in device manager) the flashing starts, but the device disconnects in 1 second, reconnects, and then disconnects again...and it stays disconnected. Then I receive this message from the tool

Do you guys have any idea why this happens? why it disconnects?