Missing hr call callback failed.

It's normal to miss the call and fail to call back. Don't be discouraged.

Maybe someone else is on the phone over there, or maybe he is busy with something else and hung you up. It seems that you also attach great importance to this job.

Anyway, don't have too many other ideas until things are clear.

Call back later. I believe that if it is a regular company, normal calls will always be answered.

After you get through, briefly explain that you missed the call and politely ask about your consideration of working there. No matter what the result is, if you miss the call, you still have to communicate with each other.