Re: But I don't have a so-called "smart" phone.
thats not how the system works.
It uses bluetooth, and records a GUID for what ever phones the first phone comes int proximity with... Then, f you get covid, the data in your phone is sucked out, and the guids are de-anomised. It does not contain gps data (allegedly) - at least the singapore version.
It has to be a smart phone, because it needs both local storage (and network access to extract this data) and bluetooth to harvest the guids.
still, its evil from a liberties perspective.