I swapped my physical sim for an esim at eastgate mall and though I was physically present with my id and proof of residence I still had to do that exam with questions like last five dialled numbers, last time I recharged, how much etc. I had my phone with me and banking app from where I buy airtime so I could just get the answers from there ( they allowed me to cheat the exam using my cellphone). I think I passed the exam because they swapped and gave me an esim voucher. Without my phone I would have failed those security questions. I am however happy that someone else will not have it easy to swap my CellC number.