In preparation for the multi-SIM setup, we need a way to tell whether
a given SIM card is active or not in the system.
On systems with one single SIM slot, the available SIM card will
always be active.
On Multi-SIM Single-Standby setups we may have multiple SIM slots with
multiple SIM cards, but only one of them will be active at any given
time.
On Multi-SIM Multi-Standby setups we may have multiple SIM slots with
multiple SIM cards that may be active at the same time. E.g. the QMI
protocol allows up to 5 different active SIM cards (primary,
secondary, tertiary...).
This patch modifies mm_3gpp_parse_iccid() to auto-detect if an ICCID
response is character swapped or not by comparsing the major industry
identifier part of the ICCID response to the known value (89) for
telecommunication purposes. This addresses the issue where the same AT
command (e.g. AT^ICCID used by the huawei plugin) does not report ICCID
in a consistent format.
Aleksander Morgado
Ben Chan
Aleksander Morgado
Dan Williams