3G sim cards

[Pranav Desai]

On 7/29/07, Andy Poling <andy at realbig.com> wrote:
>
> > Many people (including I) have not been able to get the at&t 3g sim card
> > (the one with the "3g fireball") working in our neos. The older cingular
> > ones do work (they are "64K smart chip").



I can make calls using the cingular 3G sim card. I dont know much about SIM
cards/networks but it says 3G on it and its by cingular. Is there a way to
confirm that its 3G ?


I have two cingular "64K smart chip" SIMs that won't work in the neo1973
> (CME
> 10), but they both work in both my razr and sierra ac860 card.
>
> Both SIMs are about 9-10 months old now - maybe they changed a while back
> while keeping similar markings?  On the back, one says "3G" (with a tiny
> "c"
> after it) and has the numbers 64205G and 3020.  The other also has 3G(c)
> and
> has 64205O (capital "o") and 4020.
>
> I dug up an old SIM (also cingular) that does work (so I know the GSM chip
> and
> SIM socket aren't faulty), but that account is no longer active.
>
> -Andy
>
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