If I understand correctly Saunders vs UK, if you killed someone and hide the body you have to show the body when you are asked to, even if you are just suspecte

If I understand correctly Saunders vs UK, if you killed someone and hide the body you have to show the body when you are asked to, even if you are just suspected and not confessed. The phone and the body is the parallel here, they suspect there is something in the phone so you have to produce proof of guilt - that is exactly self-incrimination.