<div class="gmail_quote"><div>Hey Michael,<br><br>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!)<br>
<br>It still works now.<br><br>Thanks,<br>Bobby aka wurp2<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Subject: <br>Hello,<br>
<br>
As most of you know, there was a bug in earlier GSM firmware on Neo 1973<br>
which prevented certain AT&T 3G SIM cards from working in the Neo 1973.<br>
<br>
As most of you know, the upgraded GSM firmware that fixed this problem<br>
could only be installed by an employee of Openmoko.<br>
<br>
I peformed this upgrade for perhaps a couple dozen of you.<br>
<br>
After I upgraded the firmware on your phones I tested them with my<br>
personal AT&T SIM card, and they always worked fine.<br>
<br>
Starting a few months ago my AT&T SIM card no longer works in upgraded Neos.<br>
<br>
We're trying to get to the bottom of this. Meanwhile, a useful point of<br>
information would be your experience:<br>
<br>
For those of you for whom I performed the GSM firmware upgrade, did the<br>
Neo 1973 work properly with your AT&T SIM card after the upgrade? Most<br>
of you wrote me when you received the phones to indicate that it did.<br>
Does it continue to do so? If not, when did this start happening? What<br>
are the symptoms?<br>
<br>
For the larger community, do any of you have insight into cellphone<br>
tower technology? Has AT&T performed an update in the past few months?<br>
<br>
Is it possible that AT&T has modified its policy towards unlocked phones?<br>
<br>
These are all extreme notions - it is far more likely that something<br>
trivial and local has occurred. Perhaps I've forgotten to do something<br>
(although I've reviewed my steps in excrutiating detail with the folks<br>
back home) during the upgrade process. But since I'm completely out of<br>
ideas, I'm reaching to the less plausible.<br>
<br>
Any ideas welcome, including crackpot ideas. To paraphrase Sherlock<br>
Holmes, when you have removed the possibility of all other causes, the<br>
one remaining explanation, no matter how implausible, must be the one.<br>
<br>
Michael<br>
<br></blockquote></div><br>