MK802-IV How to downgrade to 4.1

[DirtyrRican]

Does any one know how to downgrade the rom to 4.1. Cant run netflix on 4.2.2.

[twjordo]

Does any one know how to downgrade the rom to 4.1. Cant run netflix on 4.2.2.

thanks for making this topic and raising this question for I am wanting to do same until a custom rom becomes available - right now I have requested the original 4.1 firmware from a few places but have not had any luck getting it and I have also read in some posts that on other rikomagic devices that when you upgrade it is not possible to go back to old firmware - but I am not sure that is true (don't believe everything you read) ...my issue is that my device shipped with 4.2.2 on it already and it is definitely "buggish" and not only with Netflix but other issues as well but for the sake of keeping on topic I will not ramble on here is what I have done thus far to get the 4.1 firmware - I got a reply email from geekbuying support stating "hello friend
good morning. thanks for telling us the details
pls do not worry. we will contact to the factory
after we get the firmware 4.1 if they have, we will upload to our blog
then u can see it
thanks
anna " - and as I am moderator at rikomagic I have requested the administrator Andy Kirby to get it from rikomagic as well but neither of those sources have provided anything yet... I think I will try to reach out to some re-sellers on aliexpress to get it if none of my sources can provide it (maybe not even available???) ~~~~~~ Have you any source for the 4.1 original firmware ???? - if so I will definitely be the guinea pig and test it thanks again!

[Gasp]

...

If i am not mistaken rikomagic.co.uk is not directly related to Rikomagic... Aren't they just resellers in UK?

EDIT: Nah, they are connected, my bad.

I have many units that are still on 4.1 - If you provide me any guide how to get the original ROM from it, i could upload it

[twjordo]

that would be awesome @Gasp - but I am unaware of how to dump the device rom

anyone have a program for the rk3188 to dump it ?

[Finless]

There is no program to dump it.
You have to dump it via ADB and DD commands or use Linux and rkutility.

Bob

[twjordo]

thanks Bob

here is a quote from a member at riko forum stating going back is not possible -

...Back up to previos firmware is not availible because boot loader is changed.

I have tested multiple firmwares but they were all same os i.e. - 4.1 to 4.1 and 4.2 to 4.2 etcc... has anyone confirmed this info ????

[Finless]

thanks Bob

here is a quote from a member at riko forum stating going back is not possible -



I have tested multiple firmwares but they were all same os i.e. - 4.1 to 4.1 and 4.2 to 4.2 etcc... has anyone confirmed this info ????

That is TOTALLY an incorrect statement! The person does not know what he is talking about.
If I were to get a ROM dump of this 4.1.1, I guarantee you I can make a ROM to go back.

Bob

[Gasp]

thanks Bob

here is a quote from a member at riko forum stating going back is not possible -



I have tested multiple firmwares but they were all same os i.e. - 4.1 to 4.1 and 4.2 to 4.2 etcc... has anyone confirmed this info ????

Huh that is odd, i have flashed one unit many times trying other rk3188 ROMs - 4.1 and 4.2.2 on and back (Got a few working, except wifi and BT)

[twjordo]

thanks again Bob - it seems getting the 4.1 .img is the only hold up atm for me

still no emails or pms from my sources

btw - here is a modded v1.8 of Netflix that I do use on my other devices

http://www.mediafire.com/download/7xt98ik0zve1t58/Netflix-Black-RotationMod-v1.8.1.apk

[Gasp]

That is TOTALLY an incorrect statement! The person does not know what he is talking about.
If I were to get a ROM dump of this 4.1.1, I guarantee you I can make a ROM to go back.

Bob

I will try romdump, doesn't look that hard
Update:
4.1 Dumped - result files boot.img, config.gz, recovery.img, system.info.gz, system.tar (tar?), checksum.md5

Which files do you need (I hope there aren't my personal config files - account and etc..)

I will dump 4.2.2 also, it may be useful

[neomode]

Hello,

The 4.1.1 Firmware is very Buggy i can say. I have try it, that´s was a Nightmare.
Graphics Failures and Pixel Failures and of course the Wifi Bug.

Neomode

[twjordo]

thanks neomode for the info -

I only wish the device to function as demonstrated in the geekbuying video on YT - I was seriously concerned that there might be a leak at riko and possibly a clone was made when I first saw all the issues but not confirmed. riko claims they are working to sort the issues and I am sure soon a new fware will be released

thanks Gasp -

please upload when you can and I would love to test and mirror if you don't mind

....for now I got to go cut some hay - cows gotta eat too ttys

[Gasp]

So i got official RKM MK802IV (4.1 and 4.2.2) ROM dumps (BOOT, RECOVERY, SYSTEM partitions)
Followed this guide http://forum.xda-developers.com/show...php?p=28732414

I will upload them soon, DEVs PM me for the files and tell me which files do you need (i guess all of them)

[Finless]

We need system, recovery, and boot at a minimum. No worry about personal data as you did not dump the data space.
I will use the latest loader from Rockchip. Again that does not matter to the ROM.

Converting a dump to a flashable ROM takes time. Neomode now knows how to do it so either of us can convert it.

Bob

[Finless]

Oh also... just to be sure. If kernel is in boot.,img on this ROM we are OK. If it is not then we also need you to dump the kernel.

Just use DD to do that.

Bob