You shouldn't write on your resume that you have passed Band 4 and Band 2, because your resume is to establish your image. If you had written that, the company wouldn't have asked you for an interview. However, you can't lie and say that you have crossed the line, otherwise you will cheat the company and seriously affect your reputation. I suggest you highlight your strengths and avoid your weaknesses in your resume. When the company informs you of an interview, if you ask questions like Band 4, you should answer them truthfully, because your image will also be added to the interview.