Question for those of you for whom I've done a GSM firmware upgrade

Bobby Martin bobbymartin2 at
Tue Mar 11 01:34:23 CET 2008

Hey Michael,

I use AT&T as my service (since they bought out Cingular).  I had an
Cingular SIM (63689 G 4004) that wouldn't work.  You upgraded my GSM
firmware and it worked fine afterwards.  (Thanks!)

It still works now.

Bobby aka wurp2

> Subject:
> Hello,
> As most of you know, there was a bug in earlier GSM firmware on Neo 1973
> which prevented certain AT&T 3G SIM cards from working in the Neo 1973.
> As most of you know, the upgraded GSM firmware that fixed this problem
> could only be installed by an employee of Openmoko.
> I peformed this upgrade for perhaps a couple dozen of you.
> After I upgraded the firmware on your phones I tested them with my
> personal AT&T SIM card, and they always worked fine.
> Starting a few months ago my AT&T SIM card no longer works in upgraded
> Neos.
> We're trying to get to the bottom of this. Meanwhile, a useful point of
> information would be your experience:
> For those of you for whom I performed the GSM firmware upgrade, did the
> Neo 1973 work properly with your AT&T SIM card after the upgrade? Most
> of you wrote me when you received the phones to indicate that it did.
> Does it continue to do so? If not, when did this start happening? What
> are the symptoms?
> For the larger community, do any of you have insight into cellphone
> tower technology? Has AT&T performed an update in the past few months?
> Is it possible that AT&T has modified its policy towards unlocked phones?
> These are all extreme notions - it is far more likely that something
> trivial and local has occurred. Perhaps I've forgotten to do something
> (although I've reviewed my steps in excrutiating detail with the folks
> back home) during the upgrade process. But since I'm completely out of
> ideas, I'm reaching to the less plausible.
> Any ideas welcome, including crackpot ideas. To paraphrase Sherlock
> Holmes, when you have removed the possibility of all other causes, the
> one remaining explanation, no matter how implausible, must be the one.
> Michael
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