Trending @Capgemini; Advice needed: Handling interview integrity concerns🙂

One of my friends recently attended a client interview. In the final round, he was asked a scenario-based question and, under pressure, he checked his mobile for help. Unfortunately, the interviewer noticed this and later gave feedback stating that cheating was observed during the interview. He is afraid that he might face any disciplinary action.

Looking for genuine advice from the community:

How serious is this kind of remark from a client’s perspective?