Function get_iccid 

pub unsafe extern "C" fn get_iccid(
    handle: ClientHandle,
    sim_id: SlotId,
    iccid: *mut c_char,
    iccid_len: usize,
) -> ErrorCode

Available on non-ag35 only.

Sends a command to the modem to retrieve the ICCID from SIM in ASCII form.