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The Inet 97F was one of the earliest Allwinner based tablets and, due to its low price, got sold under many many guises, and with many different options. These changes are different battery sizes, wifi modules, touchscreen controllers, camera modules, and of course slightly differing cases.

Identification

Inet 97f
Manufacturer	Inet-Tek
Dimensions	192mm x 124mm x 12.8mm
Release Date	January 2012
Website	Device Product Page
Specifications
SoC	A10 @ 1Ghz
DRAM	512MiB DDR3 @ 408MHz
NAND	4GB
Power	DC 5V @ 2A, different 3.7V Li-Ion batteries.
Features
LCD	800x480 (7" 16:9)
Touchscreen	5-finger capacitive/resistive (Goodix GT80x or Solomon Systemtech Ltd. SSD2533)
Video	HDMI (Type C - mini)
Audio	3.5mm headphone plug, HDMI, internal speaker, internal microphone
Network	WiFi 802.11 b/g/n (Unknown Realtek device(s))
Storage	µSD
USB	1 USB2.0 OTG
Camera	0.3MP (640x480) front
Other	Accelerometer (Manufacturer device FIXME)
Headers	UART

In android, under Settings->About Tablet, you can look at the Build Number, and it should start with 97F2, like for the Yarvik Tab260:

Model Number: TAB260
Build Number: 97F2-R1-H1-H01-1366.20111219

Most rebadgers did succeed in changing the Model Number.

Sunxi support

Current status

Supported.

Images

HW-Pack

BSP

Manual build

Clarify why these are 2 different fex files, one for the inet97f-ii.fex and the one below.

Yarvik Tab 260/264

For building u-boot, use the "INet97F-II" target.
The .fex file can be found in sunxi-boards as yarvik_tab260.fex

Everything else is the same as the manual build howto.

Mainline kernel

Use the sun4i-a10-inet97fv2.dts device-tree file for the mainline kernel.

Tips, Tricks, Caveats

FEL mode

The volume up button triggers FEL mode.

Adding a serial port (voids warranty)

TTL connections

Device disassembly

The precise disassembly procedure varies per brand since each put a different case around the board. The Cherry M667 has a screwless plastic case that consists of a white back and a black front. After inserting a thin flat screwdriver the white back can easily be pushed off of the rest of the device.

It helps that for most tablets the plastic case will have a lot of empty space, since the iNet-97F board is less than half the size of the display. Put the tablet with its screen facing down, then use your hands to knock on the back cover to find any hollow areas. Those would be good places to start with the screwdriver.

Inside the device you should find a few tiny screws to hold the PCB in place (about 5), but most things are held together by tape. In the Cherry M667 the battery pack was tightly taped to the back of the display assembly. It could only be removed by guessing where the tape was (3 strips: 1 on top, 1 in the middle, 1 below) and sticking a screwdriver underneath to cut the tape.

Be very careful when removing the display assembly: its metal casing is not sealed shut very well and bends easily. In the Cherry M667 the touchscreen module is glued to the black plastic frontpanel, so when you pull out the LCD module you separate touchscreen and display. Be careful not to damage the touchscreen.

Locating the UART

The UART seems to be the 3 big pads in the bottom left corner of the board. From left to right they are: GND, RX (connect to the TX on your TTL adapter), and TX (connect to the RX on your TTL adapter). If you connect a voltmeter between GND and RX (or GND and TX) you should measure around 3 V.

The connection has been tested with a CP2102 USB to UART adapter, but others should work fine too. Do not connect the +3.3V or +5V VCC from your adapter to the PCB, this is not necessary.

The pads are quite close to eachother. To make your life a little easier the GND runs around the edge of the board, so you have a lot of freedom to choose where to connect that wire.

Serial speed is 115200.