I am seing some strange behaviour on FXT009 and FXT003, both running 7.45 f/w
SIM is in, but AT+WSHS command returns 0 (SIM holder status). Internally, our application is subscribed to SIM service and we get status SIM_REMOVED. On FXT-009 modem refused to register. On FXT003, modem happily registered, while reporting missing SIM. My guess is that problem is in OpenAT f/w and in FXT-003 registration is done purely by ICERA processor and it does not care about SIM holder status.
Issue is only seen on two modems so far. In both cases issue popped up after we used AT+WDWL command to load software. One of the units is running purely OpenAT, user application turned off. I loaded 7.45.1 before problem started, then 7.46, then downgrading back to 7.45.0 and problem was still there. On the second modem we were downloading new version of our application.
Unfortunately, both modems are not on my desk (both are couple of thouthands km away). When I tried same procedure on the modems I have here, no issues were observed.
Problem modems are not in same place. In fact they are in different countries.
The only way for me to get modems to register again was to disable SIMREMOVAL feature (at+wfm=0,7).
Did anyone observed a problem like that?