As soon as you put everything on a single point of failure, it will fail you.
It is not a good idea to have keys, documents, passes, ... all on a smartphone: it can break if dropped, it can be stolen anytime, it can have no battery. Those devices are not good for such important elements of a travel.
It is not a good idea to have keys, documents, passes, ... all on a smartphone: it can break if dropped, it can be stolen anytime, it can have no battery. Those devices are not good for such important elements of a travel.