umb_pinop
void umb_pinop(int, int, const char *, const char *);
umb_pinop(MBIM_PIN_OP_ENTER, 0, pin, NULL);
umb_pinop(MBIM_PIN_OP_CHANGE, 0, pin, newpin);
umb_pinop(MBIM_PIN_OP_ENTER, 1, pin, newpin);