INet 3F

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INet 3F
INet 3F Front.png
Manufacturer iNet Tek
Dimensions 240mm x 185mm x 10mm
Release Date October 2013
SoC A10 @ 1Ghz
DRAM 1GiB DDR3 @ 432MHz
Power DC 5V @ 2A, 8000mAh 3.7V Li-Ion battery
LCD 1024x768 (9.7" 4:3)
Touchscreen 10-finger capacitive (Goodix GT801 2+1)
Video HDMI (Type C - mini)
Audio 3.5mm headphone plug, HDMI, internal stereo speakers, internal speaker, internal microphone
Network WiFi 802.11 b/g/n (Realtek RTL8188CUS)
Storage µSD
USB 1 USB2.0 Host, 1 USB2.0 OTG
Camera 1.3MP (1280x1024) front, 5MP (2560x1920) rear
Other Accelerometer (Bosch BMA250)
Headers UART



ZaReason ZaTab

On the back of the device, the following is printed:


The PCB has the following silkscreened on it:

2012-02-06 ZGC

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

  • Model Number: ZaTab
  • Build Number: cm_zatab-userdebug 4.0.4 IMM76L eng.paulv.20120705.201823 test-keys

Polaroid MIDC010

The PCB has the following silkscreened on it:

2012-03-26 PYQ

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

  • Model Number: MIDC010

Sunxi support

Current status

The device is supported and maintained in mainline U-Boot. There is no mainstream kernel support at this point. Linux (sunxi-3.4 branch) properly supports the device.

Manual build

  • For building U-Boot, use the iNet_3G target.
  • The .fex file can be found in sunxi-boards as inet_3f.fex

Everything else is the same as the manual build howto.

Mainline U-Boot

For building mainline U-Boot, use the iNet_3F target.

Tips, Tricks, Caveats

FEL mode

Sending '2' over UART at boot triggers FEL mode from boot1.

USB storage mode

Sending '1' over UART at boot triggers an USB storage mode that exposes the nanda partition as well as the Android external storage.

Reset button

The reset button (on the PCB) reboots the device.

Adding a serial port (voids warranty)

iNet 3F pads

Device disassembly

The aluminium back case is very hard to detach from the rest of the device. In most cases, it will have to be damaged (or at least scratched) to open the device properly. There are no screws to remove nor any kind of glue, but the sides of the back case are curved to cover part of the front plastic part, making it stay it place very firmly. It is advised to use a a plastic tool and start opening at the corners of the case.

Locating the UART

The UART pads are exposed on the PCB, under the touchscreen ribbon cable, that has to be gently removed before soldering connectors. The pads are clearly labeled on the PCB: GND, Rx, Tx. Connectors can easily be soldered according to the UART howto. Ensure to cover the connectors with an isolating layer since the back of the touchscreen connector ribbon may have a conductive part.


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