Works on all Onda Tablets including new Quad-Core tablets, for VI40 Ultimate 4.1.1 go to bottom of guide.
New instructions PLEASE read carefully, if you are unsure just post what files you have in the firmware package, which tablet and which firmware it is currently running.
Please note most Onda Tablets come Pre-Rooted, download the file below, it contains Superuser and Root Explorer. Once done open the zip file and put them both on your SDcard and install Superuser first then Root Explorer, if successful you can delete the chinese apps using Root Explorer.
To install the PlayStore - First copy Phonesky.apk to your SDcard then using root explorer go to sdcard/external_sdcard and press and hold Phonesky.apk until menu shows and select copy, go back to system/app and paste it there, now press and hold Phonesky.apk for menu and select permissions, change them to RW-R-R, now press Phonesky.apk to install once done reboot.
If you don't have your Firmware file then download yours from here - http://www.onda.cn/Support/Search.aspx
Open the Firmware zip file you have then follow the step which relates to the Firmware zip file's contents.
If it contains a USB program and a Resource.zip follow STEP 1
If it contains a USB program and a .IMG file follow STEP 2
If it contains Update.zip/Patch.zip etc follow STEP 3
The USB program needs to be run with administrators privileges on Windows xp/7 32bit, copy the USB folder to your desktop then copy the Resource zip file in to the USB folder and run the USB program, you can change the language in the top left of main window, now select CONFIG tab and choose Import Update and point it to the resource zip file, then click START, once done follow root section.
Download this file - SU-RootKeeper.zip
You need to be on ICS firmware as this is pre-rooted then open the SU-Rootkeeper zip file and copy the SuperSU and OTA-Root_keeper apk' to your SDcard, then make sure the WiFi is set up and using the tablets "File manager" go to the external SDcard and install SuperSU.apk and update if it asks to do so, now install OTA-Root_keeper.apk.
Run Root-Keeper and make sure the boxes are ticked to say you have Root, then select to "BACK-UP ROOT" once done select "TEMP UN-ROOT" then exit Root-Keeper. You can now update to Jellybean using either the USB flash program or OTA and once done run Root-Keeper again and select "RESTORE ROOT".
Now download this file http://www.mediafire.com/download.php?bbuqt6rwxou7cw2
Open the zip file and copy Root Explorer to your SDcard and using the tablets File manager go to external SDcard and install it, now you can uninstall all the chinese apps using Root Explorer.
copy the following files to your SDcard -
update.zip - patch.zip - aml_autoscript - factory_update_param.aml - uboot.bin - uImage_recovery
Once done shut down tablet and boot to recovery* The white android will show for about 30 seconds and go off, it will then reappear and then the green android will show and the firmware installation will commence, once complete the tablet will restart in chinese, shut down and follow the Root Section.
Please make sure you have removed ALL files used during firmware install from sdcard, other files (music/pics etc) are ok.
Installs Superuser, Root Explorer, New Google Play Store, Maps etc and deletes chinese apps.
Download the following file -
Now open Root_Gapps_complete.zip and copy root.zip and factory_update_param.aml to your sdcard, once done shut down tablet and boot to recovery* the white android will show then the green android, once done the tablet will restart in chinese, go to the settings and change to your language and time zone then go to your apps and you will now see Superuser, Root-Explorer and Chrome etc.. if any chinese apps are left, delete them using Root Explorer.
Depending on tablet, Hold HOME-KEY for 4 seconds then still holding home-key, hold POWER-KEY until the white android shows then release BOTH keys. Not all tablets are the same some use the volume/back key instead of home key.
If your having any problems with apps not showing/incompatible follow mcduck$ post in the guide below, all thanks go to their members.
VI40 ULTIMATE 4.1.1
This is for firmware 4.1.1 Jellybean only as 4.0.3 is pre-rooted.
Download this file - Root-Restore.7z
Extract files to desktop then connect tablet to pc, make sure USB debugging and non-market apps are checked in tablets settings then double click RunMe.bat and follow instructions, if you get stuck there is a video guide below.