Openmoko Bug #666: 3G SIM capability
Openmoko Public Trac
bugs at docs.openmoko.org
Sun Jul 13 08:05:25 CEST 2008
#666: 3G SIM capability
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Reporter: steven.demetrius at fiwwi.com | Owner: michael
Type: defect | Status: new
Priority: high | Milestone:
Component: GSM Modem | Version: unspecified
Severity: critical | Resolution:
Keywords: | Blocking:
Blockedby: |
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Comment(by openmoko at enslaves.us):
I've just noticed, my Cingular branded 3G sim (7300G 3021) will not work
if it's seated correctly; but will work, and can be locked into place,
seated slight off. If I push the sim a little bit in the direction of the
notch, it seems to work. With the discussion of the appearance of the
circuit side of the sim, I took a look at the contacts for accessing the
sim in my Nokia 6102, and my Neo1973, and noticed the pins are in slightly
different places, which is how i figured this out. This might also explain
why some sims will work for some people, some of the time. This also
might only happen for some sims. If this theory makes sense to anyone
other than me, I can take photos of my sim, as well as the contacts for
the sims in the two phones to compare.
In fact, when comparing the sim to the specifications found in Annex A of
this file, www.ttfn.net/techno/smartcards/gsm11-11.pdf the contacts on the
left side (away from the big notch) do not fully cover the square
indicated, It looks like at least some of the pins on the 1973 may contact
the center section instead of the contacts they're supposed to. On an
older cingular sim (64k which I couldn't get activated), has the contacts
shaped differently than the new sim, they bulge in the center and the
contacts on the left side go more to the right. It looks like the pins on
the 1973 are towards the right edge of the allowed contact region (for all
pins), but the nokia has the pins on the left on the left side of the
region, and the pins on the right towards the right side.
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/666#comment:49>
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