I was interviewed for two technical rounds via video call, and the interview went well.

Based on my projects and domain-related experience, I was asked about programming.

The next round was taken by the manager and director. That round also went well.

Then came the HR round. That was also good. I stated my expectations, and everything went well.

HR told me, "We will send an offer letter in 3 days; the total process may take 1 week."

After that, I haven't received any offer letter, not even a response from HR.

Some consulting people processed my resume to the company. For each, they used to take feedback from them and scheduled the next round for me.

One week after completing my HR round, when I contacted these people, they said, "They have kept your position on hold; we can't give HR-related information like email ID or contact number."

When we clear all the technical rounds very well, still these people have problems. I didn't understand what type of thing that was.

Relate to LTE Physical layer and DSP questions, and C programming.