Your browser does not support JavaScript! GTA04
GTA04 Motherboard
Letux 2804 Smartphone
Letux 3704 PDA
Letux 7004 Tablet
Neo900 project
GTA04 Custom
Letux 400 Minibook

Openmoko Speaker
Goldelico Molex Cable
Letux 400
Openmoko Community
ZAGG Invisible Shield
Hardware Products
Software Products
Projects and Services
Consulting & Contract Development
  MacOS X / iPhone / Cocoa
  GNUstep / X11
  U-Boot / embedded Linux
  Embedded Hardware

Please Contact us.
30. Nov. - 1. Dec 2013: - Open Hard- and Software Workshop in Garching (Munich), Germany.
22.-25. May 2013: - LinuxTag, Berlin, Germany
2.-3. Feb 2013: - FOSDEM, Brussels, Belgium
1.-2. Dec 2012: - Open Hard- and Software Workshop in Munich, Germany.
23.-26. May 2012: - LinuxTag, Berlin, Germany

Donate to the Openmoko:Community and the OpenPhoenux project (GTA04:Donation).
Service and Repairs
Conditions / AGB
Mailing Lists

Openmoko GTA04 Motherboard -

The GTA04 is a motherboard replacement for the Neo Freerunner or the Openmoko Neo 1973. Therefore you need such a device to install the new motherboard or some creativity to print a 3D case yourself. Or you check for a complete Letux 2804 which comes inside a used Neo Freerunner case.

New features are:

  • ARM Cortex A8 processor with 1000 MHz and 512 MB RAM
  • UMTS 3.75G (14 MBit/s max.)
  • Integrated sensors (Barometer, Gyroscope, Accelerometer, Compass)
  • optional: Camera
  • USB OTG 2.0
  • fits into existing Neo Freerunner case (we have some Used Neo Freerunner)
  • Software maintenance: we will do our best to provide continuous software updates for kernel and user-space (e.g. Replicant, Debian etc.) for as many years as doable.
For a complete documentation, please study the System Manual.

We offer three different product options:

  • GTA04A5 motherboard for DIY upgrades from latest production run.
  • GTA04A4 motherboard for DIY upgrades from previous production run.
  • Letux 2804: preinstalled GTA04A5 in a refurbished Openmoko GTA02 case.

If you want to stay informed or discuss the latest announcements, please subscribe to

Note: this is not a complete phone. You need to get a new or used Neo 1973 or Neo Freerunner unless you purchase one of the rare complete Letux 2804 units. Or you take a Case Kit plus a 3D printed or 3D cut case (see for proposals).

GTA04 board

Project Donation:
1.00 €
Donation for the project

currently not in stock
Latest GTA04 revision A5 incl. software maintenance

currently not in stock
Some remaining units of older revision A4 incl. software maintenance
Letux 2804

currently not in stock
Completely installed devices with GTA04A5 board, case, display and battery incl. software maintenance
GTA04 Installation Service
10.00 € (+ shipment)
If you don't feel comfortable to peel off the LCD module. Please follow the Rework Instructions


LCD Module (TD028TTEC1)
69.00 € (+ shipment)
If you don't want to dissect your GTA02
Case Kit

currently not in stock
Compontents required to fill a 3D printed case (Speakers, Vibramotor, GPS&GSM antennae)
GTA04 Camera Module
29.00 € (+ shipment)
Optional camera module; requires you to drill a hole into the case.
GTA04 RS232 Cable

currently not in stock
Allows to access the RS232 console. Useful for debugging or controlling external devices.
Neo Freerunner:Battery
19.00 € (+ shipment)
GTA02 battery (works with GTA04)

Features GTA04A5

  • Motherboard upgrade (PCB) that fits into Neo Freerunner case (and reuses the existing Display, Battery, Antennas and some other components)
  • TI DM3730 with 800 1000 MHz
  • 512 MB RAM, 512 MB 1 GB NAND Flash
  • microSDHC slot for up to 32 GB
  • WLAN (a/b/g/n), Bluetooth 4.0 (BLE)
  • Navigation sensors: GPS, Accelerometer, Gyroscope, Barometer, magnetic Compass
  • USB OTG 2.0
  • Display (not included): 7.1cm / 2.8 inch, VGA resolution (480x640 = 285ppi), Touchscreen
  • Battery (not included): 1200 mAh
  • camera connector
  • keyboard and expansion connector
  • Stereo Audio, Microphone and Earpiece
  • Composite Video output
  • Fully open Bootloader, Kernel
  • can run Debian/LXDE, SHR, QtMoko, Replicant, ...
  • Software maintenance: we will do our best to provide continuous software updates for kernel and user-space (e.g. Replicant, Debian etc.) for as many years as doable.
  • For more details visit

Features GTA04A4

same as GTA04A5 except:
  • WLAN (b/g), Bluetooth (no BLE)
  • older Navigation sensor chips (need different drivers): GPS, Accelerometer, Gyroscope, Barometer, magnetic Compass
  • no keyboard and expansion connector


Ports of SHR, FSO, QtMoko etc. are done by these software projects
cart32.gif Shopping Cart


If the cart does not work, please check that cookies are enabled for this site

Destination*: If your country is not included in the list we regret that we currently can't serve you.
Shipment to Germany selected. Includes German VAT.
Shipping Cost calculation details

All Prices are in €
incl. German VAT 7/19% unless indicated
Payment Options
Prepaid: SEPA Bank Transfer
Major Credit Cards:
Master Card
We regret that we can't process debit cards like "VISA Electron" and "Maestro" or PayPal or BitCoin.
Information about Order Processing
Shipping Cost
VAT and Taxfree options
Stock Indicator ()
Prepaid (SEPA Bank Transfer)
Tracking of Orders
Recommend a Friend