[Bill Christiansen]

Tom wrote:

Hi, I’m using a HI12 myself but can’t get the partition to get bigger, I’n flahing a CM12, and putting the gpt.bin file in the root of the zip-file. But nothing… Can you help?

You have to flash ROM using Intel Phone flash tool and replacing the stock gpt.bin . Use stock or Remix first and after repartitioning successful you can replace with CM12.

[Bill Christiansen]

It is possible to do for advanced user. You need to replace the gpt.bin file in the ROM folder with one that modifies the partition layout and reflash android. Please see my post in this thread for details:

techtablets.com/forum/topic/how-to-increase-internal-space-on-android/

I’m still running CM12 on mine with 53Gb storage and no Windows.

[Bill Christiansen]

First get familiar with using the Intel PhoneFlashTool and flashing stock android or remix:

http://forum.chuwi.com/thread-1633-1-1.html

To repartition you use the same tool but replace the gpt.bin file in the rom folder with the modified one. I would also use the unlocked boot.img uploaded by Carlos that I linked to in my earlier post in this thread.

[Bill Christiansen]

You can read here about LiPo batteries:

https://learn.adafruit.com/li-ion-and-lipoly-batteries/voltages

3.7 Volts is the nominal (average) but 4.2 is the max or fully charged voltage

So I would definitely try to charge it some more. Also it may be difficult to start first time, try a long 15 or 20 sec hold of power button to make sure it’s off then the normal 5 sec hold

[Bill Christiansen]

The gpt.bin that I used was repacked by spzjulien for Teclast X98 and originally from Chinese Teclast bbs. I used gpt_53g.bin (renamed to gpt.bin) which give total space for Android and none for Windows. It worked for me but use at own risk.

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[Bill Christiansen]

3 volts is too low on the battery, it needs to be at least 3.7 V to boot. A charged battery would be around 4.2V.

[Bill Christiansen]

Yes, it’s possible but you need to flash the ROM with Intel Phone Flash tool, not by booting USB.

Have a look at the official firmware links on the Chuwi forum if you haven’t done that before:

http://forum.chuwi.com/forum.php?mod=viewthread&tid=1160&extra=page%3D1%26filter%3Dtypeid%26typeid%3D6

If you want to use the whole internal storage for android / remix, the partitioning file gpt.bin needs to be modified. You can see my post in this thread:

How to increase internal space on android

 

[Bill Christiansen]

There’s probably very little different in performance and older Hi12 has more custom ROM support whereas the z8350 is a bit more unknown.

[Bill Christiansen]

If you have the new z8350 CPU Chuwi says not to flash bios. The bios they publish is for older z8300.

[Bill Christiansen]

I would agree it’s unlikely to be software, maybe a loose ribbon cable missing contacts for that part of the screen, but hardware related.

[Bill Christiansen]

Overall stability and performance s better in CM12.1 and more complete play store compatibility compared to stock. Aso built in root manager that you can turn on/off in developers mode so no need to flash SU. It does have support for NTFS on USB stick. I haven’t tried the sdcard as my internal card reader is broken. I liked it so much I deleted Windows and have 53 GB Android.

[Bill Christiansen]

Not dead, mine still working 🙂  The forum gets less active when people are interested in new models. It seems the boot.img in the stock ROM you flashed is not unlocked. For me, I flashed the ROM that Carlos uploaded in the Remix thread then I changed to CM12.1.

[Bill Christiansen]

The TWRP I’m using I got from this thread:

Tethered TWRP / Clean Root / Android exFAT+NTFS support for Hi12 Dual Boot

but I have an older Hi12 so not sure of it’s compatibility with latest version. If Remix was working except for screen rotation then it’s probably just the change in g-sensor which TWRP doesn’t use so should be ok.

I had a look on the Chuwi forum but it wasn’t really clear what stock firmware to use for Z8350 cpu. Hopefully they will correct that.

[Bill Christiansen]

I have the same issue that seems to be a hardware fault with the internal card reader as it sometimes works when the card is pressed in firmly but can’t rely on it. I don’t use Windows on this tablet any more so my work-around was to reflash the tablet with 53 GB data partition and make it Android only.

[Bill Christiansen]

You probably have a later version where they changed the gsensor.

The best Android for Hi12 is CM12.1

http://www.modaco.com/forums/topic/377890-devrom281-cyanogenmod-121-android-511-for-chuwi-vi10-plus-hi10-plus-hi10-pro-hibook-hibook-pro-hi12/

First you will need TWRP recovery. There are different ways to do that but one is replacing recovery.img and boot.img  in the stock ROM folder before flashing.

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