Hi,
As I was told By SiWi representative, modem behaves as expected, as those commands will stop GSM and keep it in off state. At+CFYN=1,0 should get GSM back 9I am yet to try it).
Personally, I would expect that there should not be a situation where GPRS is up but GSM is not. It is not logical. Also, if GSM is trully off, AT+CREG? should return 2,0, not 2,2 as this is misleading.
On the other hand, there is a definite problem with the FXT-003 unit. We can reliably get it into state where underlying base-band processor crashes. After recovery attempt, AT+CREG? commands may fail to produce any result ever. I call the command from the code using API and handler is never called. Unit is registered and GPRS and GSM parts work at this stage. Given that ICERA is no longer and FXT-003 is discontinued, I do not think there will be any support, but any ideas on how to minimise ICERA crashes and/or recover from one will be greatly appreciated. Our code now consists of relatively small core with huge amount of logic around it to work around platform bugs and deficiencies.
Thanks,
Rudolf