Memup Slidepad 704ce / 704cet are very affordable Android 7' tablets with a Allwinner A13 SoC (Cortex A8 processor), 4 Gb flash memory, 512 Mb RAM, a microSD connector and a fully working micro USB OTG port.
Memup posted on their web site some new Jelly Bean 4.1.1 firmware version for these 2 tablets. This firmware is flashable thru a tool provided in the firmware archive called LiveSuit. For Slidepad 704 ce, the Jelly Bean firmware version runs very well, it is much smoother than previous ICS build.
But main drawback of these firmware is that they are not pre-rooted.
On Slidepad 704ce, I tried to flash a signed version of SuperSU from the stock recovery (3e). It has been accepted, but it didn't flash the /system partition. Any unsigned upate has been refused by the stock recovery. Then I tried with no luck to root the tablet with latest ICS/JB adb restore exploit.
As no other exploits are available at this time for Jelly Bean, what to do ? To stay with an unrooted tablet ? Too sad ... As Santa Claus says : If the door is closed, enter by the window. If the window is closed, enter by the chimney :-)
So I decided to try the hard way : by cooking the original Memup ROM to include ClockWorkMod Recovery natively. This allows to root it by flashing an unsigned su update. And after lots of efforts, it worked !
LiveSuit only runs on Windows OS. The following guide has been run from a Windows XP computer.
So, let's start ...