log also application-level errors
Right now all the logging just relates to the remsim transport layer. However, it would be rather useful to also check the SW of the SIM communication and log errors whenever non-successful SW are observed. Or at least warnings. This could help us to identify where/when communicatiaon between modem and SIM goes wrong. The best location for this is probably the client, as this is also where (if at all) we are accidentially breaking the communication on the UART.
No data to display