Community update: GSM firmware, 850MHz experiment, GTA02 progress

Michael Shiloh michael at
Mon Dec 10 22:31:08 CET 2007

As has been discussed earlier, this is not a change you can make yourself.

Conceivably, you could change the components yourself, if you had the 
right equipment, but there are also changes to the firmware that you can 
not make yourself.

There is no possibility of adding a switch, as a number of components 
have to be replaced.


Jonathon Suggs wrote:
> Depending on the level of complexity, this could be *great* news for me.
> I don't travel internationally that often (currently, but the frequency
> could always up in the future) so having quad-band is borderline nice
> and necessity.
> But if I could make changes (before/after trips) to "switch" the bands,
> then I might consider that a workable solution.  I'm fairly handy with a
> soldering iron, so as long as it isn't too complex I'd feel comfortable
> doing it.
> I know that they are probably into very finalized versions of the
> hardware, but it might be worth looking into how much change would be
> required to ease the "transition" between bands.  Example, if it is just
> a small number of wires that has to be changed, possibly creating a
> "switch" to toggle between the settings.  I, for one, would consider
> that a more than suitable workaround and almost nullify my "no-quadband"
> issues.
> -Jonathon
> -----Original Message-----
> From: Mark <markitect at>
> Reply-To: List for OpenMoko community discussion
> <community at>
> To: List for OpenMoko community discussion
> <community at>
> Subject: Re: Community update: GSM firmware, 850MHz experiment, GTA02
> progress
> Date: Mon, 10 Dec 2007 09:32:50 -0500
> In regards to the 850MHz Issue:
> It seems that very little effort was required to switch a phone board
> to 850 for testing.  So my question is what exactly is involved.  Was
> it simply switching which pin is attached to the antenna?  If it is a
> relatively simple circuit change and involving only a top (or bottom)
> layer trace, is it possible to tell us what connections to change to
> convert an existing unit to 850MHz.  Obviously only  for the very
> experienced people.  If there is different capacitor, etc required to
> match the frequency it might be less doable, but details would be
> nice. once the design has been confirmed.  On a side note this is
> excellent news that the 850 variant may not be far behind GTA02.
> Mark
> Mark
> _______________________________________________
> OpenMoko community mailing list
> community at

More information about the community mailing list