Hi Alex,

 > As I come to investigate this, I find I am concerned about using the
> Service Provider Name as I can't see any registry for those names, it's
> free text for display purposes, so I assume it is at least possible it
> might change without warning,
> whereas there does seem to be a registry for MCC/MNC (e.g.
> http://www.mcc-mnc.com/)

In theory MCC/MNC should be unique even for MVNOs.  But some have not 
followed that properly.  SPN is free-form, but it probably doesn't 
change all that often.  The provisioning database would have to be 
updated frequently.

If you know you will only need a subset of particular providers, it 
might be easier to develop your own provisioning db.

>
> I am thinking it may be preferable to use the registered IIN number from
> the ICCID - http://www.controlf.net/iccid/
>
> This seems a more controlled way of providing the uniqueness needed to
> me and presumably it's easy enough to read the ICCID out, if it's not
> already being read out.
>

I don't recall that any provisioning (proprietary or otherwise) database 
used ICCID as an identifier.  Not saying it won't work, so feel free to 
investigate what is possible.

Regards,
-Denis