[PATCH] huawei: fix ^ICCID parsing

[Aleksander Morgado]

On 09/25/2013 02:56 PM, Dan Williams wrote:
>> Seems like some modems swap digits in ^ICCID response and some don't.
>> > We may need to compute the check digit to determine which format to
>> > use.
> Ben and I talked about this yesterday; every Huawei modem I have, from
> the E160g (really old) to a new E397 (recent) swaps the digits in the
> ^ICCID response.  These are all Qualcomm-based devices.
> 
> But I think the E3xxx devices are HiSilicon-based devices, not Qualcomm
> ones.  Which would mean completely different firmware, and probably a
> completely different team, which probably interpreted the ICCID command
> specs completely differently (if there were any).  Not sure about the
> MU736 though.

Using the checksum in the ICCID would be a good way, and easy to
implement I guess. Another option would be to just check the first two
digits to see if they're 89 or 98 :) '89' is the ISO 7812 Major Industry
Identifier for telecomm purposes. Have you guys ever seen a ICCID in a
SIM card not starting with 89?

-- 
Aleksander