SIM card woes

Lorn Potter lpotter at
Tue Oct 23 21:58:52 CEST 2007

Nick Guenther wrote:
> I was having problems getting GSM to work on my neo. Eventually a
> thought struck me: maybe my SIM is 'locked' (which I still don't fully
> understand what that means), and so I tried a friend's SIM which I was
> sure was unlocked and lo and behold: I could connect. So now I either
> need to shell out for an unlocked SIM, or see if I can figure out how
> to get it unlocked.
> Does anyone know how to determine via AT commands if a SIM card is
> locked? It would be useful if gsmd could alert the user to this.

I have one "usim" that refuses to work in a v4 phone, but works fine in 
a loaner v3 phone.

I have another sim that works fine. Another developer here has an older 
sim that works 'most of the time'.

Lorn 'ljp' Potter
Software Engineer, Systems Group, MES, Trolltech

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