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Identification

Prestigio PMP3670B
Manufacturer	Manufacturer web page
Dimensions	192 mm x 116 mm x 10.7 mm
Release Date	May 2013
Website	Product page
Specifications
SoC	A13 @ 1Ghz
DRAM	512MiB @ 408MHz
NAND	4GB
Power	DC 5V microUSB, 3200mAh 3.7V Li-Ion battery
Features
LCD	800x480 (7" 16:9)
Touchscreen	5-finger capacitive (Silead GSLX680)
Audio	3.5mm headphone plug, internal speaker
Network	WiFi 802.11 b/g/n (Realtek RTL8188EUS)
Storage	µSD
USB	1 USB2.0 OTG
Camera	0.3MP (640x480) front (gt2005)
Other	Accelerometer (Domintech DMARD10), RTC (pcf8563)

The back of the tablet reads:

Prestigio Multipad 7.0 Ultra+
Tablet PC|PMP3670B

The board has the following printed on it:

A86 MB V4.0
2013/01/31

In android, under Settings->About Tablet, you will find:

Model Number: PMP3670B
Build Number: PMP3670B.2013.10.14.4.01.02

Note that there two different versions of this tablet. The ones with the black screen frame and different color back covers is what is currently documented here. There is also a version with a white screen frame and a white cover, which supposedly is somewhat incompatible with this device, as it at least has a different touchscreen controller.

Sunxi support

Current status

Supported.

Tested:

boot from SD card - mmc0
PMU
original nand flash content access
LCD
USB OTG (ethernet gadget)
USB HOST (wifi)
tablet keys

Untested (should work):

mali
cedar

Detected by kernel but needs testing:

rtc
USB WiFi
audio

Unknown:

accelerometer
camera
touchscreen

Images

HW-Pack

BSP

Manual build

For building u-boot, use the prestigio_pmp3670b target.
The .fex file can be found in sunxi-boards as prestigio_pmp3670b.fex

Everything else is the same as the manual build howto.

Tips, Tricks, Caveats

FEL mode

Powering on an A13 tablet requires somewhat longish press of the power button. If during that time Vol+ or Vol- is pressed repeatedly (~5 times) FEL mode is activated instead of powering on normally.

Enabling ADB

To enable ADB go to tablet info and tap the build number multiple (~7) times. Then in tablet settings debugging options appear. At the very top of debugging options a switch in OFF posistion is shown. Change to ON and find USB debugging in the list of options below. Tick the checkbox.

Rooting

rootdashi (Chinese) appears to root the tablet.

As advised here you should use su in adb shell to get root access.

Adding a serial port (voids warranty)

The device has no useful UART pads, as pins that would be usable for UART are in use by other devices. You can either use a µSD breakout board or disable the camera and locate the usable UART pins on the camera connector .

Device disassembly

Remove two screws on the connectors side. Then carefully use your Plastic tool to pop the clips on the back cover by pushing the back cover out, only on the sides without the connectors. The connector side will come free when the other 3 sides are released. When re-assembling, replace the connector side first.