A week after the interview, I called to ask about the results of the HR interview. He said he would text me, but now he will throw it away if he doesn't return. Is it impossible?

After the interview, HR will report to the leader according to the situation reflected by the job hunting department. It takes some time for leaders to approve personnel. It is also possible that HR will interview in batches, hoard some excellent interviewers and report them to the job hunting department in a unified way. Of course, it may have passed. If you really need and like this job, you can call for specific results. There is nothing to be embarrassed about.