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Looks like I'm having the same problem as some of the other guys.

Just got a c93 for my daughter last week, its the 2F version.
I've originally tried to flash using the original mentioned recovery and compatibility files. I've then since found that my model was shipped with ZT283_H6_2f_1GB_Android4.1_20130316_V2.2.zip
So with this in mind i'm presuming I should have used the recovery and compatibility files in the NOTE section on the 2F model?

With this being assumed I've tried to follow CT's guide to install 1.6 stock firmware but this fails.
So I then tried to flash factory reset.zip but this would not work either
Everything I try just gets constant errors stating:

E: Unable to mount '/emmc'

I've also tried flashing the ZT283_H6_2f_1GB_Android4.1_20130316_V2.2.zip ROM from the zenithink site and this also fails on flashing.

What i'm looking for is a step by step guide on what I should be doing.

I'm guessing that I should be flashing to v1.6 ROM as described by CT so many times in this post, when doing this does it make any difference which recovery.img I use? If so which should I use the original one mentioned in the 2F section ore the one in the note below that?

what I'm trying to get at is if i've screwed things I think my procedure should be as follows (the sections in bold are where i'm looking for conformation/clarification)

1 - run TWRP by creating zt-update folder in root of my SD card and renaming file to 'recovery.img' (WHICH VERSION OF TWRP IS REQUIRED)
2 - flash factory reset.zip in TWRP
3 - flash v1.6 stock rom provided in note in OP on 2F section
4 - flash compatibilty file from note in OP on 2F section (FILE ENDING 0316Kernel.zip?)
 

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If you're using the 2.2 on 2F you have to go back to 1.6 and use the stuff in the "note" section.

You need to downgrade because Zenithink tried to screw us (I don't think it's an unintentional bug
), with their new bootloader (even on the C71A/C71L) when you boot to recovery using the button trigger AND the recovery.img on the microsd it wipes the partition table on the NAND (nice move ZT
).

The easiest way is downgrading to 1.6, it might even work if you just grab the recovery.img and from 2.2 (if it has root permissions on it) you just flash the recovery.img on the recovery MTD partition (flash_image recovery /path/to/recovery.img) and after that you boot into android using "reboot recovery" command or booting with the button trigger but WITHOUT the recovery.img file present in /sdcard/zt-update folder

But this second step is for "power users"


Anyway, once again, nice move ZT, you tried to screw me...
 

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The problem I'm having is getting back to 1.6.
The second method you mention I'm assuming is if i'm booted into the 2.2 OS and using something like terminal emulator? Problem is I cant get an OS to boot at all at the minute.

I've tried flashing 1.6 using the recovery.img from the original 2F section and also the notes section. Should it make any difference which of these I use to try and re-flash 1.6?
My next issue is am I using TWRP correctly?
I'll list below the exact steps I take and hopefully someone can point out what I'm doing wrong.

1 - boot into TWRP using back + power button on c93 (by using the NEW recovery.img from the 'notes' section)
2 - select INSTALL from TWRP menu
3 - choose the 1.6.zip ONE PROBLEM I MAY HAVE HERE IS SHOULD I HAVE THE 'Using extrenal SD' or 'Using internal storage' CHECK BOX TICKED?
4 - .zip tries to flash but i get E:Unable to mount '/emmc' error

Anyone have any idea which bit i'm doing wrong, i'm sure its pretty simple
 

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Discussion Starter · #405 ·
to flash stock firmwares you need the stock recovery
 

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It must be some app you've installed that maybe tries to sync or do whatever the app is going to do when the screen turns on and for some reason fails and crashes the whole system.
Try to do a factory reset and see if it happens on a "naked" system
Hi Christian,

A great thanks, it was an app. After i uninstall it, no more freezes ! Thanks for this great rom and your help !
 

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Discussion Starter · #407 ·
Hi Christian,

A great thanks, it was an app. After i uninstall it, no more freezes ! Thanks for this great rom and your help !
 

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Discussion Starter · #408 ·
today I will release the updated ROMs. Subscribe to this thread because from now on zenithink devices will use the compatibility zip as well.


In a couple of hours all the roms will be up and you'll be ready to test it. BTW I was able to test it only on the C97
 

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today I will release the updated ROMs. Subscribe to this thread because from now on zenithink devices will use the compatibility zip as well.


In a couple of hours all the roms will be up and you'll be ready to test it. BTW I was able to test it only on the C97
So is this the new thread to watch for C93/C97 ROM updates ?
and then we'll use the link you just gave for the common & compatibility files.
 

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Discussion Starter · #410 ·
That link is just for the compatibility zip, roms update are in the "official thread" linked at the beginning of that OP. BTW i compile new ROMs every 2 weeks, usually on saturday or sunday
 

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That link is just for the compatibility zip, roms update are in the "official thread" linked at the beginning of that OP. BTW i compile new ROMs every 2 weeks, usually on saturday or sunday
Hi Christian,

Is the popping sound problem in standby solved in your ROMs now? In that case I'd move back to PA3. Thanx for all your work!!!

Sent from my g04ref using Tapatalk HD
 

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Discussion Starter · #414 ·
Hi Chris,

Why is nos necessary the comp zip for C97? What's the procedure to put CM 10.1 on it ?

Sent from my Zenithink C97
you just have to flash one more zip, everything is explained in that thread
 

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Discussion Starter · #416 ·
there won't be any update for this rom so it's better if you move to the comp zip based one
 

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Hi Christian,

Remember me ? My C93 was freezing after unlock. After you told me to try again with a "naked" tablet, all was ok. But not for a long time...

I've tried differents solutions, and i think i found the bug ! When i set the wifi policy to "when screen turns off", it freezes when unlocking (about
% of the time). If i set it to "never", i have no problem.

Is it a known bug ? I don't find much informations on that issue.
 

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Discussion Starter · #418 ·
Nope, it's an hw fault. Your unit has troubles coming out from suspend to ram state.
 

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Nope, it's an hw fault. Your unit has troubles coming out from suspend to ram state.
That's a bummer. Mine has been doing the same thing for the last month or two. Not sure which release it started with, but it didn't do it when I first got the C93. If it's a hardware defect I really doubt there's going to be any hardware/warranty support from Zenithink.
 
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