Is it a possible downgrader the bootloader?

[mega-samu]

I have a doocoler r39 with Android 6.0. But only it allows me to install rom that his bootloader is 2.32 (since rk3229_6.0_MX4N_SSV6051p_zhongx_20170616_v017_Spec tek). The question is a possible downgradear to 2.31? Since the majority of rom use as the bootloader 2.31

[anthony96]

It's possible, see bellow.

1. Install RK Drivers.
2. Run rk develop tool.
3. At the bottom of program select boot (extracted boot loader bin fine)
4. Select erase ID Block.
5. Now select download to flash bootloader back.

The tool can be downloaded here http://chinagadgetsreviews.blogspot....date-tool.html. You can extract the bootloader with Android tool 2.3 which can be found anywhere.

[gefattern]

Hi ,

but why shall you do that you can flash it without changing the Bootloader .

Really not understand why ??? good luck

gefattern

[mega-samu]

Hi ,

but why shall you do that you can flash it without changing the Bootloader .

Really not understand why ??? godd luck

gefattern

It gives mistake to the flash and I think that it can be for the bootloader.

[gefattern]

Hi mega_samu ,

does the Device start with this Firmware ???

greetings

gefattern

[mega-samu]

Hi mega_samu ,

does the Device start with this Firmware ???

greetings

gefattern

Wine with android 6 (I think that it is the same that it has now (
rk3229_6.0_MX4N_SSV6051p_zhongx_20170616_v017_Spec tek))

The rom that I try flash is this:

Also I have proved several of v88 and not flash.



Enviado desde mi Redmi Note 3 mediante Tapatalk

[gefattern]

Hi mega_samu ,

the best is you post a Pictures of your PCB (nearby good quality) , so we can search for the right Rom ,

and restore your Box that you can use it . That is important , no Panic we get it back to life , but be

patient and send the Pictures that we can go on . greetings

gefattern

[mega-samu]

To work works. But I look for other compatible rom. Afterwards I do photos to the PCB.

I am sorry, for my bad english.

[gefattern]

Hi mega_samu ,

okay as u want , but if you flash bad Rom it can brick , and we have to restore first ,

I know here are some useable Roms , but for this we need a Pic. of PCB .

gefattern

[pauljbl]

I cannot flash any v88 roms with 2.31 loader on my v88 either.
anybody know how to change a ROM to 2.32 loader?

[vagvalas]

Hi also here try to flash a V88_Firmware_Dump with 2.31 bootloader and other STOCK fw with that version with completely fail.
The weird is that i had another V88 (in 2016 August. that it came with 5.1 with 2.31 bootloader, and it flashed liked a charm) This one on PCB refered as 2017-05-04 and it only accept all STOCK and not ATV all roms with bootloader 2.32.... So is there any way to flash back the old one 5.1 with 2.31?
Come on its the same HW exactly with the same wifi chip and same nand.....
Someone?

Thank you.

[angelobiz]

It's possible, see bellow.

1. Install RK Drivers.
2. Run rk develop tool.
3. At the bottom of program select boot (extracted boot loader bin fine)
4. Select erase ID Block.
5. Now select download to flash bootloader back.

The tool can be downloaded here http://chinagadgetsreviews.blogspot....date-tool.html. You can extract the bootloader with Android tool 2.3 which can be found anywhere.

HOW you can extract bootloader whit android tool 2.3?

[mega-samu]

Well if it helps, this is the rom I use in my Doocoler D39. Supposedly it is compatible with all v88 y D39.

https://uploads.to/238cit63zfz1

[aquarius]

hi, I can not download this file.
can you reload file?